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Dissertations / Theses on the topic 'Lumbar strength'

Author: Grafiati

Published: 2 June 2025

Last updated: 31 July 2025

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1

Buckenmeyer, Laura. "Optimization of Pedicle Screw Depth in the Lumbar Spine: Biomechanical Characterization of Screw Stability and Pullout Strength." University of Toledo / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1365099627.

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2

Masaki, Mitsuhiro. "Studies on sagittal spinal alignment in middle-aged and elderly women and on strength training of lumbar back muscles." 京都大学 (Kyoto University), 2016. http://hdl.handle.net/2433/215469.

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3

Altunsoz, Omur Serdal. "Determine The Effects Of Long Term Playing Soccer On The Degeneration Of Lumbar Spine." Master's thesis, METU, 2006. http://etd.lib.metu.edu.tr/upload/12607487/index.pdf.

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The main purpose of this study was to determine whether playing soccer at high intensity training for a long period causes degeneration of the lumbar spine or not. This degeneration may occur without any symptoms or low back pain. Results of the present study were discussed in the framework of lumbar disc degeneration, trunk strength, lumbar and hip bone mineral density, trunk flexibility, activity MET scores for active and veteran soccer groups. There have been four subject groups in this study (15 active soccer players, 15 sedentary participants, 14 veteran soccer players, 13 sedentary parti

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4

Song, Ino. "The effect of variations in the strength and type of spinal muscles on the stabilization of the lumbar spine via follower compressive load mechanism." Thesis, University of Iowa, 2017. https://ir.uiowa.edu/etd/5638.

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The ligamentous human lumbar spine is considered as a long and slender column, which can be buckled when subjected to the axial compressive load even less than 100N. However, previous in vivo study showed that the compressive force acting on the spine predicted by intradiscal pressure was exceed 2600N. Meanwhile, recent experiments suggested that, when the compressive force is subjected to the lumbar spine along the spinal curvature (follower load), the lumbar spine may support up to a compressive force of 1200N without buckling while maintaining its flexibility. Since such a follower load is

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5

Silva, Lincoln da. "Proposta de método de avaliação da força de extensão lombar por meio da dinamometria." Universidade do Estado de Santa Catarina, 2015. http://tede.udesc.br/handle/handle/327.

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Made available in DSpace on 2016-12-06T17:07:06Z (GMT). No. of bitstreams: 1 Lincoln.pdf: 1533006 bytes, checksum: ae93ee7385384ea081f013ac9aaded2d (MD5) Previous issue date: 2015-09-25<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>This study aimed to propose a method for assessing isometric strength of lumbar extension by dynamometry, aiming to investigate the possibility of estimating the functional capacity of the trunk extensor muscles in office workers. The Sociodemographic, anthropometric, clinical characteristics, functional capacity and isometric muscle strength o

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Janulis, Marius. "Liemens raumenų izometrinės jėgos, simetriškumo ir gyvenimo pilnatvės kaita atliekant stuburo stabilizavimo ir laikysenos korekcijos pratimus asmenims, kuriems diagnozuota juosmeninės stuburo dalies išvarža." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2013. http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2013~D_20130613_144432-76257.

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Tyrimo tikslas – įvertinti liemens raumenų izometrinės jėgos, simetriškumo ir gyvenimo pilnatvės kaitą po taikytos stuburo stabilizavimo ir laikysenos korekcijos programos asmenims, kuriems diagnozuota juosmeninės stuburo dalies išvarža bei vargina lėtinis apatinės nugaros dalies skausmas. Uždaviniai: 1. Įvertinti vyrų ir moterų, kuriuos vargina lėtinis apatinės nugaros dalies skausmas, nugaros, pilvo bei liemens šoninių raumenų izometrinės jėgos kaitą po taikytos kineziterapijos; 2. Įvertinti vyrų ir moterų nugaros-pilvo bei liemens šoninių raumenų izometrinės jėgos santykio kaitą po taikytos

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7

Higgins, Edward Donald. "The strength of bonded wood strand composites." Thesis, University of British Columbia, 1990. http://hdl.handle.net/2429/30613.

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A method for modelling the strength of bonded wood strands which are oriented principally in one direction is proposed. The hypothesis tested was that strand grain orientation data, fitted to a von Mises probability distribution, could be used in an analysis for estimating the potential tensile strength of an ideally bonded composite. The strand strength, resolved at any loading angle with respect to the principal composite strand orientation axis, was multiplied by the distribution probability at that angle. When integrated over all angles, this product yielded the mathematical expectation of

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8

Santos, Marta Silva. "A importância do core na funcionalidade de jovens adultos." Pós-Graduação em Educação Física, 2018. http://ri.ufs.br/jspui/handle/riufs/7842.

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In recent years, the scientific community has emphasized the importance of the core both in the sports context and in rehabilitation. The core is an area of the body, responsible for generating force from the center and dissipating it to the extremities. In this perspective, specific exercises have been used for this area in functional training, in order to promote improvements in functional and core performance. However, it is not clear in what magnitude the core actually participates in performing functional actions in young adults and yet whether the inclusion of core-specific physical exer

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9

Cai, Yanling. "Statistical methods for relating strength properties of dimensional lumber." Thesis, University of British Columbia, 2015. http://hdl.handle.net/2429/54404.

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We present a novel approach for predicting one lumber strength property from another, each being measured destructively. The objective is to reduce the cost of lumber monitoring programs, by measuring one of the properties and predicting the other. To reach the objective, we review single proof load design (SPLD) proposed to assess dependence between two jointly normally distributed random variables X and Y that cannot be observed simultaneously. The SPLD tests specimens in one mode X up to a determined load (proof loading), and the survivors are tested to failure in a second mode Y. To resolv

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10

Nava, Guilherme Thomaz de Aquino [UNESP]. "Avaliação das respostas neuromusculares durante atividades funcionais em adultos com dor lombar crônica idiopática." Universidade Estadual Paulista (UNESP), 2017. http://hdl.handle.net/11449/150244.

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Submitted by GUILHERME THOMAZ DE AQUINO NAVA null (gtanava@gmail.com) on 2017-04-11T22:09:25Z No. of bitstreams: 1 Dissertação completa 11.04.17.pdf: 1432186 bytes, checksum: 8e046f8b963abbcce7de1c7843bdc403 (MD5)<br>Approved for entry into archive by Luiz Galeffi (luizgaleffi@gmail.com) on 2017-04-17T19:39:39Z (GMT) No. of bitstreams: 1 nava_gta_me_rcla.pdf: 1432186 bytes, checksum: 8e046f8b963abbcce7de1c7843bdc403 (MD5)<br>Made available in DSpace on 2017-04-17T19:39:39Z (GMT). No. of bitstreams: 1 nava_gta_me_rcla.pdf: 1432186 bytes, checksum: 8e046f8b963abbcce7de1c7843bdc403 (MD5) P

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Chuo, Terence Chung Biau. "Fire Performance of Connections in Laminated Veneer Lumber." Thesis, University of Canterbury. Civil Engineering, 2007. http://hdl.handle.net/10092/1131.

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The embedment strength of timber with respect to exposure temperature has not been widely studied. Some studies have suggested that the timber totally loses its embedment strength when the timber temperature reaches 300℃. This research concentrates on the embedment strength study of Laminated Veneer Lumber (LVL) timber product exposed to elevated temperatures up to 250℃ using singly bolted connections. Experiments showed that the embedment strength of LVL decreased at a constant rate from 0.08 kN/mm² to 0.025 kN/mm² once the bolt temperature increased from ambient conditions. The embedment str

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12

Gray, Jody D. "In situ determination of strength and stiffness of structural lumber and composite products." Morgantown, W. Va. : [West Virginia University Libraries], 2003. http://etd.wvu.edu/templates/showETD.cfm?recnum=2817.

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Thesis (M.S.)--West Virginia University, 2003.<br>Title from document title page. Document formatted into pages; contains xi, 154 p. : ill. (some col.). Vita. Includes abstract. Includes bibliographical references (p. 112-122).

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13

Xiong, Pingbo. "Modelling strength and stiffness of glued-laminated timber using machine stress rated lumber." Thesis, University of British Columbia, 1991. http://hdl.handle.net/2429/29824.

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A localized E-simulation model and a strength simulation model, which are based on the theories of stationary random process and the bivariate standard normal distribution, have been developed. A group of 2x6 2100f-1.8E SPF MSR lumber have been tested to obtain the within-board compressive strengths. The test E-profiles and compressive strength data was used to provide the statistical information for E-simulation model and σ-simulation model. The comparison between the within-board compressive strength test data and the simulation results shows that the E-simulation approach and the σ-simula

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14

Showalter, Karen L. "The effect of length on tensile strength parallel-to-grain in structural lumber." Thesis, Virginia Tech, 1985. http://hdl.handle.net/10919/41539.

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<p>Two sizes (2x4 and 2x10) and two grades (2250f-1.9E and No. 2 KDl5) of Southern Pine lumber having three different test span lengths of 30, 90 and 120 inches were tested in tension parallel-to-grain. Results obtained from the tests indicated that the tensile strengths of the 30-inch test specimens were significantly higher than the tensile strengths of the 90- and 120-inch test specimens. A tensile strength-length effect model was developed for generating tensile strength values of lumber taking the length effect into consideration. The model generates tensile strength values for lumber lon

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15

Heatwole, Edwin L. "Allowable bending strength enhancement of 2 by 4 lumber by tension and compression proofloading." Thesis, Virginia Polytechnic Institute and State University, 1987. http://hdl.handle.net/10919/53718.

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Research has established that correlations exist between bending and tension, and bending and compression strength of lumber. Because of this correlation, improvement in bending strength may be realized from proofloading in tension or compression. The data utilized in a reliability analysis was from Galligan et al. (1986) that characterized the properties of 2-inch softwood dimension lumber with regressions and probability distributions. Randomly selected groups of 2 by 4 1650f-1.5E Hem-fir and No.2 KD Southern Pine were evaluated for bending strength. One group from each species was selected

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16

Jamil, Nor Aini. "Vitamin D and muscle strength in ethnic minorities visiting Scotland : and a comparison of their sunlight behaviour with residents of South East Asia." Thesis, University of Aberdeen, 2016. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=228979.

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There is a paucity of longitudinal data investigating the role of vitamin D in the maintenance of health in ethnic minority groups. Specifically, little is known about the role of vitamin D on muscle strength, how this affected by emigrating from low to high latitudes. This PhD thesis provides insight into the relationship between vitamin D status and muscle strength in healthy adults migrating from sunny climates (45°N to 45°S to the equator) to higher latitude (Aberdeen, 57°N) (first study) and also sunlight behaviours in both low and high latitudes (second study). A total of 71 people of et

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17

Bonnevie, Tristan. "Nouveaux outils et optimisation des outils existants pour la réhabilitation respiratoire et la ré-autonomisation des patients atteints d'un handicap ventilatoire. Chronic obstructive pulmonary disease Six-minute stepper test to set pulmonary rehabilitation intensity in patients with COPD - a retrospective study Can the six-minute stepper test be used to determine the intensity of endurance training in early stage COPD : a multicenter observational study The six-minute stepper test is related to muscle strength but cannot substitute for the one repetition maximum to prescribe strength training in patients with COPD People undertaking pulmonary rehabilitation are willing and able to provide accurate data via a remote pulse oximetry system : a multicentre observational study Mid-term effects of pulmonary rehabilitation on cognitive function in people with severe chronic obstructive pulmonary disease NIV is not adequate for high intensity endurance in COPD Home-based neuromuscular electrical stimulation as an add-on to pulmonary rehabilitation does not provide further benefits in patients with chronic obstructive pulmonary disease : a multicenter randomized trial Lumbar transcutaneous electrical nerve stimulation to improve exercise performance in COPD patients Advanced telehealth technology improves in-home pulmonary rehabilitation for people with stable chronic obstructive pulmonary disease : a systematic review Nasal high flow for stable patients with chronic obstructive pulmonary disease : a systematic review and meta-analysis." Thesis, Normandie, 2020. http://www.theses.fr/2020NORMR024.

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La réhabilitation respiratoire (RR) est recommandée dans la prise en soin des patients atteints d’un handicap ventilatoire afin d’améliorer leur qualité de vie. Malgré une efficacité clairement établie, très peu de patients en bénéficient et les modalités optimales d’entrainement restent à définir. L’utilisation des outils existants et des nouveaux outils pour optimiser l’accès au programme et ses effets représentent des développements majeurs qui méritent d’être évalués. Dans le cadre de cette thèse, nous avons cherché à aborder ces deux problématiques (1) en tentant de proposer un modèle de

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18

HUY, DINH CONG, and 丁公輝. "An Optimization Study of Screw Orientation on the Pullout Strength of Anterior Lumbar Plate System." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/25351964582756356916.

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碩士<br>國立臺灣科技大學<br>機械工程系<br>101<br>Anterior lumbar plate system has been widely used as an effective interbody fusion device for treating spinal cord compression. In order to reduce the chance of clinical complications including the implant loosening and breakage, manufacturers have provided many kinds of anterior lumbar plate with variable angle screws. However, these devices, which were inserted with a particular inclined screw angle to strengthen whole plate system, were used based on the experience of surgeon without biomechanical evidences. Therefore, the purpose of this study was to inves

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19

Hilligan, Bruce Kevin. "The relationship between core stability and bowling speed in asymptomatic male indoor action cricket bowlers." Thesis, 2008. http://hdl.handle.net/10321/342.

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Thesis (M.Tech.: Chiropractic)- Dept. of Chiropractic, Durban University of Technology, 2008. x, 52 leaves, Appendices A-E, [25] leaves.<br>To determine whether a relationship exists between core stability and bowling speed in Action Cricket bowlers. Methods: Thirty asymptomatic indoor Action Cricket fast and fast-medium bowlers were divided into two groups of 15 each, with Group A having well-developed core stability and group B having poorly-developed core stability. The concept of matched pairs was used for age and cricket experience in order to maintain homogeneity between the groups.

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20

Shelly, Cassi Elizabeth. "Effects of fusion mass density and fusion location on the strength of a lumbar interbody fusion." 2004. http://etd.nd.edu/ETD-db/theses/available/etd-05072004-084209/.

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Thesis (M.S.M E.)--University of Notre Dame, 2004.<br>Thesis directed by Glen L. Niebur for the Department of Aerospace and Mechanical Engineering. "May 2004." Includes bibliographical references (leaves 72-75).

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21

Lai, Chi-Ping, and 賴奇屏. "The Effect of Low Back Strengthening on Quadriceps Strength in Low Back Pain Patient with Lumbar Sacralization." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/62026316620877137384.

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碩士<br>台北巿立體育學院<br>體育與健康學系碩士班<br>98<br>The purpose of the study was to investigate: low back strengthening effects of the low back pain patients with lumbar sacralization on (1) low back isometric strength, range of motion (ROM) and back pain scale of (2) quadriceps isokinetic strength and knee pain scale. Thirty low back pain patients with lumbar sacralization were divided into two groups, group A (extensor-flexor) and group B (flexor-extensor). In the 1st session of 6-week training group A started low back extensors strengthening and group B did flexor and in the 2nd session, the training pro

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22

Thiel, Gregory Justin. "The effectiveness of spinal manipulation at L3 on lumbar paraspinal extensor muscle endurance in asymptomatic males." Thesis, 2014. http://hdl.handle.net/10321/1318.

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Submitted in partial compliance with the requirements for the Masters’ Degree in Technology: Chiropractic, Department of Chiropractic, Durban University of Technology, Durban, South Africa, 2014.<br>Background Spinal manipulative therapy (SMT) is a commonly used therapeutic modality. It has been shown that neuromuscular reflexes are elicited during spinal manipulation resulting in changes in the surrounding muscle tonicity and seen as changes in surface electromyography. Despite this little is known about the effect that SMT may have on muscle function. Increased maximum voluntary contraction

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23

Hung, I.-Chun, and 洪儀君. "The Ice Pack Application Short Effect of Lumbar Range of Motion, Trunk Muscle Strength, and Muscle Endurance Performance on Sacralized L5 Patients." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/26659811928107873118.

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碩士<br>國立體育大學<br>運動科學研究所<br>98<br>PURPOSE: This research was designed to study on the ice pack application short effect on patients’ lumbar Range of Motion, Trunk muscle strength and muscle endurance. Patients with low back pain were caused by Sacralized L5 were selected by clinical diagnosis. METHOD: 24 subjects were conducted in this study. 12 subjects who have low back pain and were dignosed with Sacralized L5 as experimental group, other 12 healthy subjects who have similar ages, heights, and weights with experimental group as control group. Two groups had lumbar Range of Motion, Trunk musc

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24

Wang, Chia Cheng, and 王家政. "The Relationships Between Lumbar Lordosis and the Length and Strength of Muscle Groups Controlling the Pelvis in Treatment-Based Classification of Low Back Pain." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/62rrhk.

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25

Matsebula, Lindelwe. "The effectiveness of lower thoracic spinal manipulation on lumbar extensor muscle endurance and range of motion in asymptomatic males : a placebo controlled study." Thesis, 2015. http://hdl.handle.net/10321/1344.

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Submitted in partial compliance with the requirements for the Master’s Degree in Technology: Chiropractic, Department of Chiropractic, Durban University of Technology, Durban, South Africa, 2015.<br>Background: Spinal manipulative therapy (SMT) is a commonly used treatment for many musculoskeletal conditions although the exact mechanism explaining its effectiveness is not well understood. Several studies have investigated the effect of SMT on the paraspinal muscles where neuromuscular effects have been observed, however few studies have assessed whether these changes result in a change in the

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26

Saboksayr, Hossein. "Tensile strength estimation of lumber." Thesis, 2001. http://hdl.handle.net/2429/13832.

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The problem of wood tensile strength estimation of softwood lumber is studied in this thesis. The main contributions brought to this topic here are first, a set of knot geometry features that can be used in board strength estimation, and second a learning algorithm that selects the best set of features for the purpose of strength measurement. The estimation problem is posed as an empirical learning problem that is based on the measured properties of wood. The process of producing the required database consisted of three distinct tasks: selecting and preparing the boards, measuring a set of pro

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27

Maul, Derek G. "Bending strength of reclaimed dimensional lumber." 2004. http://catalog.hathitrust.org/api/volumes/oclc/56773868.html.

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Thesis (M.S.)--University of Wisconsin--Madison, 2004.<br>Typescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 179-181).

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28

Yee, Hon Wing. "Shear strength of Canadian softwood structural lumber." Thesis, 1995. http://hdl.handle.net/2429/4209.

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An experimental study has been conducted to evaluate the longitudinal shear strength of Canadian softwood structural lumber using a two span five point bending test procedure. Nominal 38mm x 185mm Douglas-Fir, nominal 38mm x 185mm and nominal 38mm x 285mm Hem-Fir and Spruce-Pine-Fir boards have been considered. Flat-wise and edge-wise modulus of elasticity tests have been conducted for each specimens prior to the destructive shear tests. A two span five point bending test procedure has been chosen because of its ability to produce a relatively high percentage of longitudinal shear failur

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29

Gyamfi, Charles Kumi. "Effect of proof loading on the strength of lumber." Thesis, 2002. http://hdl.handle.net/2429/12077.

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A Monte Carlo simulation program was used in this study to evaluate the performance of No.2 and better grade combination of 38 mm x 140 mm Western Hemlock lumber proof loaded in bending. Two proof load magnitudes of 19.54 MPa and 23.05 MPa representing the 2nd and 5th percentile load levels of the short-term strength respectively were selected for the proof testing program to investigate the impact of proof loading. The rate of loading for all the testing programs was 2679 MPa/hr. The Canadian damage accumulation model was incorporated into the simulation program to calculate the probab

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30

Yang, Zhuo. "Torsional Shear Strength and Size Effect in Structural Composite Lumber." 2012. https://scholarworks.umass.edu/theses/964.

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The natural variation of strength properties within brittle materials leads to size effect, a well-known phenomenon whereby the mean strength of a material is observed to decrease as the stressed volume increases. An important implication of size effect is that size adjustment parameters must be incorporated into multi-axial constitutive and failure models used in numerical simulations to predict material response to loading. This experimental study seeks to verify and quantify the presence of depth effect under shear failure in the orthotropic principal material directions of parallel strand

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31

Williamson, Justin Andrew. "Statistical models for the effect of length on the strength of lumber." Thesis, 1992. http://hdl.handle.net/2429/3347.

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This thesis concerns the problem of modelling the effect of length on the strength of lumber. The length effect manifests as a shift to lower values of the strength distribution from shorter to longer boards. This effect is also noticeable for other materials. It is usually attributed to a statistical effect: a longer member has a greater chance of having a serious defect. This effect is not currently allowed for in design codes, which results in boards of different length having different reliability. A method is needed to find adjustment factors that will provide equal reliability. It h

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Heck, Leanne Renee. "Evaluation of the torsion test for determining the shear strength of structural lumber." Thesis, 1997. http://hdl.handle.net/1957/33992.

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The torsion test was evaluated as a method for determining the shear strength of full-size structural lumber. The evaluation involved an experimental length study, an experimental depth study, and a finite element study. The length study consisted of fifty nominal 2x4 specimens, ten specimens for each length, and ten American Society for Testing and Materials (ASTM) shear blocks. One 14 foot long board yielded one specimen for each length: (a) 21.0", (b) 28.5", (c) 32.0", (d) 35.5", (e) 39.0", and (f) an ASTM D143-94 shear block. The statistical analysis revealed no evidence that the length af

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Courchene, Terry. "The effect of edge knots on the strength of Western SPF MSR lumber." Thesis, 1996. http://hdl.handle.net/2429/4724.

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Mill visits were conducted to evaluate the effect of Visual Quality Level (VQL) restrictions of edge knots on the yields of Machine Stress Rated (MSR) lumber. This initial study indicated that edge knots contribute significantly to the amount of MSR lumber that is being downgraded because of visual override requirements, representing in excess of $15,000 per month in lost revenue to MSR producers. Therefore, an experimental study was initiated to study the effect of large VQL (edge knots) on the strength properties of Spruce-Pine-Fir (SPF) MSR lumber. Two groups of material were studied

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莊鴻濱. "Studies on the fundermental properties and joint strength of laminated veneer lumbor of china fir and Cxy ptomeria." Thesis, 1991. http://ndltd.ncl.edu.tw/handle/00968911562047147120.

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35

Steiniger, Markus. "Tensile strength and performance of the INDUO®-heavy-timber connector in combination with structural composite lumber and Douglas fir." Thesis, 2003. http://hdl.handle.net/2429/14327.

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The INDUO-connection is a new steel-to-wood joint for highly loaded heavy-timber structures. Embedded in the end-grain of laminated timber beams, the special INDUOconnector is designed to transfer axial and transverse loads. Due to the weaker strength properties of solid wood perpendicular to the grain direction, the connection's capacity under transverse loading is comparatively small. Parallel to the grain, however, the connection is capable to transfer loads of up to 180kN and is thus predominantly suited for tension applications. Since the introduction to the European market in the M

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Stahl, Douglas C. "The effect of "dive" on the tensile behavior of defect containing lumber modifications to the U.W. grain angle strength prediction program /." 1988. http://catalog.hathitrust.org/api/volumes/oclc/20031600.html.

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Thesis (M.S.)--University of Wisconsin--Madison, 1988.<br>Typescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 62-64).

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