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1
Ballenberg, Nat. "Clutch pitching in baseball does it exist? /." Diss., Connect to the thesis, 2007. http://hdl.handle.net/10066/986.
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Hagee, Daniel R. "Baseball Temporal Seam Recognition Study." The Ohio State University, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=osu1458666577.
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McNally, Michael P. "Energetic Contributions to Performance and Upper Extremity Joint Kinetics in Baseball Pitching." The Ohio State University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=osu1543411893186982.
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Leslie, P. Jason. "The Effects of Video-Computerized Feedback on Competitive State Anxiety, Self-Efficacy, Effort, and Baseball Hitting-Task Performance." Thesis, University of North Texas, 1998. https://digital.library.unt.edu/ark:/67531/metadc278280/.
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This study examined the effects of frame-by-frame video-computerized feedback on competitive state anxiety, self-efficacy, effort, and baseball performance of high school players. Players were randomly assigned to one of three feedback conditions: (a) Hitting score, (b) Hitting score and frame-by-frame analysis of a mechanically correct swing, (c) Hitting score and frame-by-frame analysis of participant's swing and a mechanically correct swing. Once per week for six weeks, the players completed three questionnaires: (a) Hitting Self-Efficacy Scale, (b) Competitive State Anxiety Inventory-2C, and (c) Performance Effort Scale, and performed a hitting task. Results of the 3 (Group) x 6 (Trials) ANOVAs revealed no significant effects. This study does not support previous confidence-baseball hitting research.
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Boyer, Brent Leonard. "Using the self-as-a-model with video editing in athletic performance." Scholarly Commons, 1987. https://scholarlycommons.pacific.edu/uop_etds/501.
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A study was designed in order to assess the effectiveness of a positive self-modeling strategy in increasing the performance of four University of the Pacific baseball players. A multiple baseline design across participants was used as a means of assessing the effectiveness of the self-modeling technique. Participants viewed edited positive self-modeling videotapes of their own batting performance. Measures were taken on: (a) the number of line drive hits; (b) ground ball hits; (c) the number of times the participant hit a ground ball, but was thrown out; (d) the number of times the participant hit a line drive, but it was caught; (e) swings and misses; (f) not swinging at a strike (called strikes); (g) not swinging at a ball (called balls); (h) the number of foul balls; and (i) the number of pop ups. In addition, batting averages were kept for game performance. It was expected that participants would show an increase in hits, a decrease in hit outs, a decrease in called strikes, an increase in called balls, a decrease in foul balls, and an increase in batting average when each participant began the positive self-modeling. The performance of those participants not yet viewing their positive self-modeling tape was not expected to show such improvement. Improvement was observed in three out of the four participants.
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CHIANG, JUNG-CHUNG, and 江榮忠. "An investigation of winning percentage pitching and batting performance of top six countries in 2013 World Baseball Classic." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/9vw4bc.
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碩士輔仁大學
體育學系碩士在職專班
104
At the 117th IOC (International Olympic Committee, IOC) Session in 2005, the major program revision was the exclusion of baseball and softball from the official program in 2012 London Games. After that, some of the baseball power nations proposed to hold a baseball game, which opens the limitation to the participation of the Major League Baseball (MLB) players. This international baseball competition eventually has been named “World Baseball Classic (WBC)” to distinguish among the World Cup held every two year and the World Series of the MLB Finals. The investigation of the baseball statistics helps to read the game and analyze the team characteristics, and further to strengthen the weakness of a team. The study uses 43 games records of WCB in 2013 to investigate if the hitters’ offensive capability of the top six rank teams, including numbers of two-base hit, three-base hit, home run (HR), total hits, on base percentage (OBP), batting average, slugging percentage (SLG) have the significant relevance. Also, to probe if there is a significant difference between the winning percentage and the pitchers’ defensive capability, which can be measured by the numbers of hit (H), HR, bases on balls (BB), the strike outs (SO), the earned runs (ER), and the earned run average (ERA), among the top six rank teams. Conclusion: 1.The numbers of hits of the top six rank teams in WBC 2013 is the only measurement of the teams’ offensive capability, which has a significant relevance to the winning percentage. That means the hitting capability is a very important factor to affect if the team could win the game in the recent international competition. 2.All the six records about the teams’ defensive capability have no significant relevance to the winning percentage. Based on this finding, we can assume that there must have other elements which determinate the outcomes of the games. 3.There are no significant differences between the overall performances of both the offensive and defensive capability of the top six rank teams and their winning percentages. Keywords: World Baseball Classic, winning percentage
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Shih-YuKuo and 郭時聿. "Differences in Baseball Batting Movement Strategy between Facing a Pitcher and Pitching Machine." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/99495078425274151776.
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碩士國立成功大學
體育健康與休閒研究所
101
Pitching machines are able to offer pitches with both quality and quantity for baseball batting practice. Until now, however, pitching machines still cannot completely simulate a real pitcher’s pitching motion. Whether by rotating a metal arm or squeezing through rubber wheels, none of the pitches generated by pitching machines can provide sufficiently informative cues that batters used to acquire from pitchers before ball release. To understand if a batter would change his strategy of batting movement due to unequal information provided by a pitching machine as opposed to a real pitcher, four professional baseball players in the minor league in Taiwan were recruited. The vertical ground reaction forces of their batting movements were recorded, and all three subjects were analyzed as a single subject. We examined several time instants of events and also some kinetic parameters. It turned out that every subject stepped earlier, shifted weight more slowly with a significant difference during “swing to impact” in facing a pitching machine. The variability of stepping was also raised. However, the other parameters had different characteristics among subjects and needed to be interpreted individually. These results may be attributed to lack of visual clues which could be found in a real pitcher’s whole body kinematics, and resulted in an uncertainty for the batter. Therefore, it was concluded that our participants did change their batting movement strategy in the batting practice with a pitching machine. It has to be noted that it is premature to generalize this conclusion to larger population due to small sample size used in this study.
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Pluta, Anthony III. "Using background EEG to predict baseball batting performance." Thesis, 2017. https://dspace.library.uvic.ca//handle/1828/8477.
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In this thesis, I sought to determine whether frequency bands in the human electroencephalogram could be used to predict baseball batting performance. Past electroencephalographic (EEG) studies have found that alpha power in the human electroencephalogram predicts subsequent performance. Specifically, Mathewson and colleagues (2012) found that background brain activity, in particular, frontal alpha, had a direct correlation with one’s ability to learn a video game. Here, we decided to see if a similar result would hold true for baseball batting performance. We used a portable electroencephalographic (EEG) data collection system to record EEG data prior to batting practice. Participants sat quietly in a room with the portable EEG unit affixed to their head. Participants then stared in silence at a fixation cross in the center of a computer screen for 30 seconds and then counted backwards from 1000 by 7’s for 30 seconds as a masking task while background EEG was recorded. Player’s were then immediately given live batting practice and with performance judged by three different coaches on four different criteria. The four criteria were: batting mechanics, power, contact, and the batter’s ability to recognize good and bad pitches. Post-hoc, a frequency decomposition was performed on each participant’s EEG data to obtain power in all frequency bands. A correlation analysis of EEG power and batting performance showed that beta power and not alpha power predicted the subsequent performance of the batter. Importantly, a high correlation and significance show that predicting a batter’s performance with a portable EEG system, specifically the MUSE Headband, is highly plausible.Graduate
2018-08-09
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張霖家. "Effect of visuo-motor behavior rehearsal on baseball pitching performance." Thesis, 1988. http://ndltd.ncl.edu.tw/handle/19607432454762841595.
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Wen, Tsai Yi, and 蔡意雯. "The Effect of Balance on Baseball Pitching Performance and Kinematics." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/92104476851180888677.
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碩士臺北巿立體育學院
運動器材研究所
96
Good balance performance is important for baseball pitchers in order to achieve an ideal balanced position. The primary aims of this study are to: (a) compared the balance data (one leg stance test, eyes-close and center of pressure displacement), the baseball pitchers’ pitching performance (ball velocity and accuracy), kinematics (stride length, lead knee flexion, foot placement, center of mass displacement, pivot knee joint displacement, pivot ankle joint displacement and temporal data) between a normal situation and using an unbalanced base to interfere with the pitching motion. (b) Investigate the correlation between balance performance and pitchers’ performance, the correlation between pitchers’ performance and kinematics. Twelve healthy male right hand dominant baseball pitchers, from the Taipei Physical Education College baseball team, participated in this study. Ten motion capturing high-speed digitizing cameras, (Motion Analysis Corporation., Santa Rosa, CA) were used to record the three dimension throwing kinematic patterns of pitching. AMTI force plate were use to collected center of pressure data at the same time. Ball velocity was measured when the ball contacted the target net. Using a STALKER sports radar gun. A digital camera (Sony, DCR-TRV40, Japan) was used to record ball contact on the target net. siliconCOACH Pro video analysis software was employed to calculate the distance between ball location and target center. A self-made unbalanced base was used to disrupt pitching movement. COP displacement of wind-up phase, accuracy, stride length, COM displacement of stride phase and time percentage of arm-acceleration phase significantly affected the unbalanced base situation. Finally, there is no significant correlation relationship found in this study. The unbalanced base affected the part of baseball pitchers’ balance performance, pitching performance and kinematics, thus, in order to improve baseball pitcher performance, baseball pitchers could notes these parameters and it will help coaches and players to adjust specific conditions.
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Chen, Yu Chuan, and 陳玉船. "Effects of Somatic Movement Education on Body Awareness Ability and Baseball Batting Performance for Youth Baseball Players." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/6mku86.
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碩士國立臺東大學
進修部運動休閒管理碩(假日)
99
The purpose of this study was to explore the effects of Somatic Movement Education, which emphasized on breathing awareness, body structure cognitive learning and somatic games, for youth baseball players, in order to enhance their baseball batting performance. Both qualitative and quantitative research methods were used to collect data. There were 20 youth baseball players as objects from Bei-Nan Elementary School in Taitung county. They were divided into two groups: 12 players in experimental group and 8 players in control group. The experimental group took 10-week courses of Somatic Movement Education besides their regular baseball training, however the control group only took their regular baseball training. The players in experimental group had to fill in all the learning sheets related to the course and interview notes as the quantitative data. These two groups were tested on batting performance before and after the course, by using batting strike-rate and batting distance average as quantitative index. By comparing the difference between experimental and control group, the testing data collected before and after the course were analyzed by ANCOVA to investigate the effect of Somatic Movement Education course on baseball batting performance for youth baseball player. The results were as follows: 1. Youth baseball players were able to apply the ideas from Somatic Movement Education to assist their baseball skill training, especially through the breathing awareness and relaxing to use the body structure cognitive knowledge. 2. The Somatic Movement Education training could help the youth baseball players to explore their own body awareness and to discover their body structure
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Estes, Brent Cullen James Jeffrey D. "Slugger or slacker a sabermetric assessment of free agency on major league baseball player performance /." Diss., 2006. http://etd.lib.fsu.edu/theses/available/04062006-125546.
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Thesis (Ph. D.)--Florida State University, 2006.Advisor: Jeff James, Florida State University, College of Education, Dept. of Sport Management, Recreation Management and Physical Education. Title and description from dissertation home page (viewed June 13, 2006). Document formatted into pages; contains ix, 131pages. Includes bibliographical references.
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Tang-chao-Chun and 唐昭鈞. "The Analysis of Relavent Factors on Baseball Batting Performance and Swing Time." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/45420903362513388367.
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碩士中國文化大學
運動教練研究所
91
The Analysis of Relavent Factors on Baseball Batting Performance and Swing Time Abstract The purpose of this study is to explore a baseball hitter’s swing time and whole body reaction time at different pitching speed. We analyzed and discussed a hitter’s swing time, the relationship between swing time and batting average, whole body reaction time and batting average, and whole body reaction time and swing time. Using product-moment correlation analysis, we collected and examined 15 testers’ basic data. We employed experimental equipments to measure whole body reaction time. Besides, we examined swing time at different pitching speed, calculated batting average of a year, and investigated the relationship among swing time, whole body reaction time and batting average. The average age of the 15 testers was 29.9, average height was 176.5 cm, average weight was 81.7 kg, and average year as a baseball player was 19. The testers were asked to swing as the pitching machine pitched at two different speed, 120km/hr and 130km/hr, respectively. We recorded the tester’s swing movement with a video camera. Then, we examined his swing time and used whole body reaction timer to measure the whole body reaction from different angles. A product-moment correlation analysis was employed to determine whether the variables were correlated. The results are as follows: (1) A significant correlation was found between whole body reaction time and batting average (P<.05). (2) A significant correlation was found between whole body reaction time and swing time at different pitching speed (P<.05). (3) A significant correlation was also found between swing time and batting average (P<.05). (4) From the results described above, there exists a strong association between whole body reaction time and swing time. It is one of the most important factors that would influence the hitter’s batting average. Key words: swing time, batting average, whole body reaction time.
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謝志偉. "The Influence of Pitching Performance upon Winning Percentage of Professional Baseball Teams –A Case Study of Major League Baseball." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/47gw4u.
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碩士美和科技大學
運動與休閒系碩士班
104
The purpose of this study is intended to: (1) probe into the current status of Major League Baseball (MLB) pitchers’ pitching performance indicators in the regular season. (2) compare the differences in pitching performance of MLB pitchers’ from different teams. (3) analyze the impact of pitching performance on winning percentage in MLB regular season. The research took the MLB pitchers from different teams as participants, through collecting regular season pitching data from 2005 to 2015 by MLB official site as the sample, and an analysis of the influence of pitching performance upon regular season winning percentage was conducted. After analyzing the obtained data, the following results were observed: (1) the pitching performance indicators indicated New York Yankees, Los Angeles Dodgers, and Los Angeles Angels were better pitching performance teams; (2) the pitchers’ performance indicators ranked higher in American League, American League Central and populations in metropolitan area; meanwhile, the more the payroll is, the more it would be in a higher ranking; (3) the save rate of the pitching performance, on base rate and save opportunities were efficient in predicting winning opportunities and explaining the variance (52.3%), of which the save rate was the most significant factor on the team winning percentage (39%). Conclusions: The pitching performance of MLB pitchers from American League, metropolitan area, and with high payroll would rank higher. The winning percentage would be more than fifty percent. To improve the winning percentage, the teams should reinforce the hitters’ combat efficiency based on the team salary structure, especially the bullpen players. In the meantime, the teams should enhance pitchers’ training, draw up various plans for offense and defense, and reduce the chance of hitter on base to improve winning percentage.
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Lin, Chao Hon, and 林昭宏. "The Effects of CubaBall Training on Pitching Performance of Junior Baseball Pitchers." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/53642558741149508194.
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碩士國立臺灣師範大學
運動科學研究所
99
Purpose: To investigate the effects of Cubaball training during 10 weeks on Taiwan junior baseball pitchers’ pitching speed, accuracy and muscle action potential. Methods: Subjects were 16 high school baseball pitchers. (age: 17.6±0.9 yr, height: 175.8±7.4 cm, weight: 72.4±8.1 kg). A random sample design was used for the experiment. Both Cubaball training group and normal pitching group were separated for 8 pitchers. The effect of treatment were evaluated using a paired sample t-test to compare. A p values of less than .05 were considered to be statistically significant. Result: Pitching speed: Cubaball (122.48±13.83km/hr), normal pitching (122.73±8.32 km/hr); pitching accuracy: Cubaball (18.75±12.46%), normal pitching (12.50±10.35%); Muscle action potential of extensor carpi radialis: Cubaball (436.32±45.77uV), normal pitching (439.48±45.44); Muscle action potential of flexor carpi radialis: Cubaball (413.86±95.93uV), normal pitching (419.83±107.64uV). Muscle action potential of flexor carpi radialis of Cubaball before and after (404.96±93.26 and 413.86±95.93uV), Muscle action potential of flexor carpi radialis of normal pitching before and after (417.40±106.92 and 419.83±107.64uV). Conclusion: The Effects of Cubaball training on pitching performance of junior baseball pitchers in Taiwan was no significantly different. But muscle action potential of flexor carpi radialis of Cubaball and normal pitching were significant different. Therefore, Cubaball training could enhance flexor carpi radialis muscle power.
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Peng, Hsien Ting, and 彭賢庭. "Effects of Functional Arch Support Insoles on Pitching Performance of Baseball Pitchers." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/41733971839048388699.
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碩士中國文化大學
體育學系運動教練碩博士班
103
Within these few years in Taiwan, the number of participants in baseball have been increasing . Sport injury prevention and performance enhancement products are popular among players. The purpose of this study is to analyze how pitching with functional arch support insoles can affect the stabilities of knee and ankle joints, accuracy of ball control, and velocity of fastball. This study was a repeated measures design. Subjects were asked to wear two different foot insoles and pitched fastball on an indoor pitching mount. Subjects were asked to pitch 15 fastballs and had to deliver the next pitch within 20 seconds after receiving the ball from the catcher. Pair sample t-test was used to analyze and compare the data collected from the experiment. The result shows that subjects wearing the functional arch support insole increased the velocity of their fastball by 0.2%, the accuracy of ball control by 5%, the percentage of strike by 2%, the stability of the leading foot ankle by 9%, and the impact of the leading foot decreased by 1%. All of the aforementioned parameters were not statistically significant except for the stability of the leading foot knee which increased by 10%. The study concluded that the effect of wearing functional arch support insole on the velocity of fastball was small but it showed a large improvement in the stability of the leading foot knee. Keywords: stability, knee joint, leading foot
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Chang, Yu-Cheng, and 張育誠. "The effect of the performance of baseball batting in the different batter’s boxes." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/3kw6n8.
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碩士國立臺東大學
體育學系碩士班
97
The purpose of this study was to compare with the influences of performance of baseball batting, when baseball player stood in used and non-used batter’s boxes. The experimental participants were twelve baseball players who were certain elementary school students in Taitung City. Using of Qualisys Motion Capture Systems and Noraxon TeleMyo 2400T G2 to capture the kinematics and EMG during the phase of baseball swing. The independent variables were used and non-used batter’s boxes. The dependent variables were batting performances, inclusive of bat swing speed, hitting accuracy, kinematic parameters of the wrists, elbows, knees and muscle activity. Dependent sample t-test, principal component analysis, and Pearson product-moment correlation were applied to examine the hypothesis of this study, and the significance level set at p＜.05. The results of this study were that the most differences were instantaneous bat swing speed, hitting accuracy, lead knee flexion, muscle activation of triceps brachii of lead and trail hand. The conclusions of this study showed that: 1. For the baseball players, the task constraints could affect the bat swing speed and hitting accuracy. Standing at the non-used batter’s box, they couldn’t perform the same bat swing speed and hitting accuracy at the used batter’s box. 2. Batting in the different batter’s boxes could affect the lead knee flexion. At the non-used batter’s box, players changed the degrees of freedom of lead knee flexion to achieve the task. 3. The task constraints could affect the muscle activation of triceps brachii, players must adjust the parameters of muscle to accurately hit the ball. Key words: baseball, bat swing, batter’s boxes
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"A Comparison of the Effects of Imagery and Action Observation on Baseball Batting Performance." Master's thesis, 2010. http://hdl.handle.net/2286/R.I.8735.
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abstract: This study investigated the effect of two different preparation methods on hitting performance in a high&ndashfidelity; baseball batting simulation. Novice and expert players participated in one of three conditions: observation (viewing a video of the goal action), visualization (hearing a script of the goal action), or a no&ndashpreparation; control group. Each participant completed three different hitting tasks: pull hit, opposite&ndashfield; hit, and sacrifice fly. Experts had more successful hits, overall, than novices. The number of successful hits was significantly higher for both the observation and visualization conditions than for the control. In most cases, performance was best in the observation condition. Experts demonstrated greater effects from the mental preparation techniques compared to novices. However, these effects were mediated by task difficulty. The difference between experts and novices, as well as the difference between the observation and visualization conditions was greater for the more difficult hitting task (opposite&ndashfield; hitting) than for the easier hitting task (sacrifice fly). These effects of mental preparation were associated with significant changes in batting kinematics (e.g., changes in point of bat/ball contact and swing direction). The results indicate that mental preparation can improve directional hitting ability in baseball with the optimal preparation methods depending on skill&ndashlevel; and task difficulty.Dissertation/Thesis
M.S. Applied Psychology 2010
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Lu, Lee-Chang, and 呂理昌. "Effects of 10-Weeks Underweighted and Overweighted Training on Pitching Performance in Youth Baseball Players." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/85171473357120297597.
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碩士臺北巿立體育學院
運動器材研究所
99
ABSTRACT Introduction: A pitcher was the most important player in baseball game. A fast and accurate pitche often advantaged on decreasing hitter’s swinging time and disturbing swinging rhythm. Thus, pitching velocity and accuracy were critical factors for an elite pitcher. Objectives: This study was to examine the effects of pitching training with various weighted baseball on pitching velocity, pitching accuracy, strength, power, and pitching movement. Methods: Thirty-six youth baseball players were divided into 125g-underweight group, mixed group with 145g-standard, 175g-overweight, and 125g-underweight, as well as 145g-standard group. All groups trained 3 days a week for 10 weeks. The pitching velocity, pitching accuracy, 145g-baseball throwing distance, 50g-ball throwing distance, shot-put, grip force, finger strength, 30m sprint, and pitching movement were measured at pre- and post-training. Results: After 10-weeks training period, the underweight and mixed groups both significantly improved in pitching velocity about 3.12±3.68% and 2.12± 2.67%, in 145g-baseball throwing distance about 2.67±2.60% and 2.76± 3.74%, in 50g-ball throwing distance about 5.39±3.74% and 9.40±6.53%, as well as in arm swing velocity about 5.34±5.41% and 4.97 ±6.71% (p<.05). However, there were not significant improvement in standard group (p>.05). Conculsion: The findings suggested that both pitching training groups with underweight baseball and with various weighted baseball singnificant improve pitching velocity and throwing distance by increasing arm swing velocity. The smaller torgue of elbow and shoulder joints were found when lighter baseball throwing compare to standart baseball throwing. The underweight baseball was an appopriate implement of pitching training for youth baseball players who were in the period of developing physique, physical fitness, and pitching technique. For adapting the weigh of a standard baseball, mixed pitching with standard, overweight, and underweight baseball should be use before approaching competition season. Key words: pitcher, pitching velocity, arm swing velocity, softball.
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Garin, Theresa May, and 泰瑞莎‧葛琳. "Effects of Dynamic and Static Stretching on the Subsequent Pitching Performance in Collegiate Baseball Players." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/92y9x2.
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碩士中國文化大學
體育學系運動教練碩博士班
102
Stretching is an important component of all athletic warm-up routines. These activities are done before exercises as they are believed to prepare the body for vigorous physical activities and athletic events. The study poses that there is no significant difference between the effects of dynamic and static stretching to the pitching velocity of the players. This research aims to determine the effect of dynamic versus static stretching of throwing shoulder on throwing velocity of baseball players. The subjects of the study were 15 collegiate baseball players of Chinese Culture University. A repeated measure One-Way ANOVA was used to determine if there is any significant differences in velocity performance existed in baseball players. The statistic significance was set at p < .05. The result showed that stretching protocols has no significant effect on the pitching performance of the baseball players. It is concluded that no matter what type of stretching was performed there is no significant effect, either negative or positive, on the performance of throwing velocity among baseball players
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Lan, Tian-Yong, and 藍天勇. "An Analysis of Taiwanese Professional Baseball Fielders’ Batting Performance and the Salary in the Sequential Year." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/97193036940070913044.
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Yang, Ming-Dar, and 楊明達. "Effects of Weight and Medicine Ball Training on Muscular Strength of Upper Body and Pitching Performance in Baseball Players." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/64848377657746089422.
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碩士大葉大學
運動事業管理學系
93
The purpose of this study was to investigate the effects of 8 weeks weight training or medicine ball training on muscular strength of upper body and pitching performance in baseball players. Twenty-three baseball players aged from 15 ~ 19 were divided into weight training group (WT group, n=8), medicine ball training group (MB group, n=7) and control group (C group, n=8). All subjects sustained the regular baseball training programs during the experimental period. The subjects of WT group and MB group had additional training schedules with barbell or medicine ball three times per week. The throwing distance and pitching velocity of baseball, time of shuttle run as well as the strengths of pectoralis major m., latissimus dorsi m., rectus abdominis m., erector spinae m., left and right external oblique m. of subjects were tested before and after training. Paired t-tests and one-way independent ANOVA were used to compare the variables within and between groups. The results showed that all variables were no significant differences between three groups before training. After training, the strengths of rectus abdominis m. and right external oblique m. in MB group and the pectoralis major m. in WT group were significantly higher than C group (p＜.05). There were no differences between WT and MB groups after training. Moreover, the baseball throwing distances as well as strengths of pectoralis major m., rectus abdominis m. and erector spinae m. in both WT and MB group were significantly increased (p＜.05) after training. The strengths of left and right external oblique m. in MB group were also significantly increased (p＜.05). Furthermore, the baseball pitching velocities of MB group were significantly increased from 115.0±4.8 to 120.0±4.8 km/hr (p<.05). During the experimental periods, the increasing percentages of pitching velocity and strength of left external oblique m. in MB group were significantly higher than WT group. It can be concluded that medicine ball training has the similar effects with weight training. Moreover, the efficiencies of pitching and strength of abdominal muscle by medicine ball training is better than weight training. Medicine ball training may be applied to the baseball players and the persons without the equipments of weight training who need to enhance the power and muscular strength of upper body.
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Chen, Pai-Lien, and 陳百鍊. "The Investigation of the Effect of Glenohumeral Internal Rotation Deficit to Pitching Performance in Student Baseball Pitchers in Taiwan." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/25180891990853141461.
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博士國立體育大學
競技與教練科學研究所
103
Background: Glenohumeral internal rotation deficit (GIRD) has been observed in the throwing shoulder of baseball pitchers. The reason may be result from bony or soft tissue adaptation. GIRD may induce shoulder injury in baseball players. However, little is known pitchers with GIRD may affect the pitching performance, but by physical therapy could decrease GIRD and improve pitching control. Purpose: (1) To investigate the timing that Taiwanese student baseball pitchers occurred GIRD during years of play. (2) To evaluate the difference of pitching performance between GIRD and Non-GIRD group in different level schools.(3) Clarify physical therapy may be improved on GIRD in baseball pitchers(4) Pitching performance may be improved after GIRD is corrected in baseball pitchers. Methods: 258 healthy baseball pitchers (age 10-16 years) participated in this study. The evaluation included bilateral passive shoulder rotation range of motion (ROM) using a standard goniometer. All pitchers will carry out a pitching performance test while throwing fastballs. The pitching performance of 3 different targets was compared with each GIRD and Non-GIRD groups. Furthermore, pitchers with GIRD were randomized 2 groups. 33 pitchers in the experiment group received stretching exercise and deep massage techniques. 35 pitchers were the control group. Data were collected on bilateral passive shoulder rotation ROM and pitching performance. All tests were performed before and after 8 weeks intervention. Results: Baseball pitchers had greater GIRD in the dominant side in 3 years of play between 13 to 14 years. There was a significant pitching performance difference between GIRD and Non-GIRD in different level schools. Also GIRD group in elementary school tended to reflect the balls to dominant side in lower outside target (p=0.05) and GIRD group in junior high school tended to reflect the balls to right upper side of dominant arm in central target (p<.05) and GIRD group in high school showed the balls to upper side in central target (p<.05) compared with Non-GIRD group. Besides, in the dominant arm, the experiment group showed significantly improved internal rotation ROM and total rotation ROM than that of control group (p<.05). Furthermore, the analyses of pithching performance relative to direction and distance between each ball location and target in the experiment group showed significantly improved than those in the control group(p<.05). Conclusion: In Taiwanese student baseball pitchers with GIRD will present improper sport performance. However, the physical therapy showed decreased GIRD, increased total rotation ROM in the dominant arm, and improved pitching performance.
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周玄武. "The Effects of Caffeine Ingestion on Pitching Performance of Senior High School Baseball Pitchers：Take Sioufong Senior High School in Taipei County for Example." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/3qdvj2.
Full textAbstract:
碩士國立臺灣師範大學
體育學系
97
Purpose：To investigate the effects of caffeine ingestion on high school baseball pitchers’ muscle action potential, pitching speed, accuracy and rating of perceived exertion（RPE）in Taiwan. Methods：Subjects were 10 high school baseball pitchers.(age:16.7±1 yr, height:174.3±4.3 cm, weight:72.5±7.3 kg, years of pitching:2.8±1.3 yr), A double-blind repeated-measures design was used for the experiment. The testing order was counter-balanced. Placebo or caffeine (5mg/kg) capsules were ingested 60 minutes before 20 pitching tests with a 7-day washout period between tests. The effects of treatment were evaluated using a repeated-measures t-test to compare：muscle action potential, pitching speed, accuracy and RPE. A p values of less than .05 were considered to be statistically significant. Results：Muscle action potential of triceps：caffeine (0.45V), placebo (0.42V)；muscle action potential of wrist flexor：caffeine (0.23V), placebo (0.23V)；pitching speed：caffeine (116.4km/hr), placebo (113.9km/hr)；pitching accuracy：caffeine (23.6％), placebo (28％)；RPE：ingested caffeine (13.5), ingested placebo (14.1), the results of all the above tests were no significantly difference between groups. Conclusion：The effects of caffeine ingestion on pitching performance of senior high school baseball pitchers in Taiwan was no significantly different. The pitching number is about 20 pitches (the average pitching number of one inning). We can only infer that the caffeine consumption doesn`t have significantly influence on whose pitching number is lower than average. But for those whose pitching number is larger than average, we still need to go for further research.