Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 45 for “"hamstrings"”.
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Kinematic and Kinetic Effects of Alterations in Lumbar Lordosis in People with Tight Hamstrings
… investigated further in this thesis, is tight hamstrings. Specifically, the effect of hamstring length on pelvic position during gait and activities of daily living under normal and altered spinal position were investigated as part of this study in a motion analysis lab.</p> <p>First, a marker …
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The Relationship Between the Hamstrings to Quadriceps Strength Ratio and Anterior Cruciate Ligament Forces
… osteoarthritis (OA). Forces developed by the hamstrings and quadriceps have been found to decrease and increase forces on the ACL, respectively. Thus, some believe that the ratio of the strengths of these muscles groups (the H:Q strength ratio) is relevant when discussing ACL forces; a low H:Q …
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An Investigation Into Isokinetic Normative Data of the Quadriceps and Hamstrings Muscles of Males and Females, Ages 36 Through 40
… (selected) normative data for the quadriceps and hamstrings muscles of males and females ages 36 through 40.</p><p>Sixty adults, meeting specific age, medical, and activity requirements were tested on the Cybex II System. Reciprocal contractions of the quadriceps and hamstrings were performed at …
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Muscle-specific considerations for aging human skeletal muscle
… lateralis, vastus medialis, vastus intermedius), hamstrings (biceps femoris short and long heads, semitendinosus, semimembranosus), psoas, rectus abdominis, lateral abdominals (obliques and transversus abdominis), and paraspinal muscles (erector spinae and multifidi) of older individuals from the …
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Influence of Thigh Muscle Forces on Anterior Cruciate Ligament Forces during Single-Leg Landing from Three Different Heights
… on the tibia that causes the ACL to strain, the hamstrings muscle can protect the ACL by producing a posterior shear force to the tibia reducing the strain. When the hamstrings contract simultaneously with the quadriceps, ACL strains are considerably less compared to isolated quadriceps forces, …
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The effect of protective knee braces on agility and muscle performance
… torque/body weight ratio of the quadriceps and hamstrings at 60 deg/sec and 300 deg/sec; (2) average range of motion for knee extension/flexion at 60 deg/sec and 300 deg/sec; (3) average power, torque acceleration energy, and endurance ratio of the quadriceps and hamstrings at 300 deg/sec. …
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A Subject Specific Surface Electromyography Model For Estimating L4/L5 Compressive Loading
… Heavy loading of the lumbar spine and tight hamstrings have been identified as risk factors for LBP. Tight hamstrings pull the pelvis posteriorly and reduce the lordosis of the spine, resulting in increased loading of the lumbar vertebral bodies of the spine. While this mechanism has been …
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The Long Term Effects of Short-Wave Diathermy and Long-Duration Static Stretch on Hamstring Flexibility
… Thirty college-age students with tight hamstrings (inability to achieve >160° knee extension at 90° hip flexion) participated. Subjects were assigned to 1 of 3 groups, (diathermy and stretch; sham diathermy and stretch; control). Range of motion was recorded before and after each …
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Momentinis volavimo poveikis paviršinei nugarinei miofascijinei grandinei /
… (n = 20), Group B – thoracolumbar fascia and hamstrings (n = 20), Group C – gastrosnemius muscle and plantar fascia (n = 20). Participants were evaluated before, immediately after and 30 minutes after foam rolling. The evaluation of range of motion was assessed using a goniometer or …
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A sensor system to detect events in gait for the correction of abnormalities in neurological patients
Contraction of the hamstrings or gluteals muscles, using electrical stimulation, could improve the abnormal gait in neurological patients. The stimulation timing which follows the normal muscle activity is impractical to achieve using the traditional sensor (the footswitch). This study focuses on …
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A comparison of muscle damage, soreness, morphology, T2 changes and running performance following an ultramarathon race
… and T2 relaxation times of the quadriceps and hamstrings in an experimental group of endurance runners that took part in a 90 km ultramarathon race and a control group of endurance runners that did not take part in a 90 km ultramarathon race; and (d) to evaluate potential relationships between …
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The relationship of hamstring and hip flexor flexibility to injury rates in collegiate football players
… excluded from this study. Measurement of the hamstrings was done with a passive knee extension test; hip flexors were measured with prone hip extension test. Sixteen hamstring strains occurred within the fifty participants. Correlation statistics were done to show relationship between the two …
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Isokinetic muscular strength and performance in youth football : relationships with age, seasonal variation and injury
… torque relative to body weight (PTBW)) of the hamstrings (H) and quadriceps (Q) using both concentric (CQ, CH) and eccentric muscle actions (EH) was evaluated. Muscular performance of the same muscle groups (characterised by H:Q ratios (conventional (CHQ) functional (FHQ)), asymmetry (dominant …
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Effects of onsite stretching exercise on employee musculoskeletal discomfort and wellbeing
… Exercises targeted the neck, shoulders, triceps, hamstrings, and quadriceps. The exercise program was conducted 5 days a week for 5 consecutive weeks, during daily shift meetings. The results of the intervention revealed that average discomfort levels reduced significantly (p<0.1) in neck (1.4 …
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Embodied multimodal referring expressions generation
… to communicate their intents as humans do, which hamstrings naturalistic multimodal IVA. We introduce SCMRE, a situated corpus of multimodal referring expressions (MREs) intended for training generative AI systems in multimodal IVA, focusing on multimodal referring expressions. Our contributions …
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Effects of Stretching on Jumping Performance
… stretching routine of the gluteus maximus, hamstrings, quadriceps, and triceps surae. This stretching protocol lasted 7 minutes. The non-stretching group did not stretch, they performed two jump tests; the pre-stretching group stretched first and then performed the two jump tests; and the …
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The influence of trunk inclination on lower limb moments and muscle activation patterns
… patterns and the activation of the quadriceps, hamstrings and gastrocnemius along with muscle co-contraction. This third study also aimed to understand the biomechanical effects of increasing trunk flexion but looked at healthy older people and patients with knee OA. Both the second and third …
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Influence of Externally Applied Moments and Loads on Knee Kinematics: A Cadaveric Study of Single- and Multi-Axis Loading of the Knee
… (FCTS) with simulated quadriceps (300 N) and hamstrings (180 N) muscle loads along with a joint compressive force (150 N). Similar trends were observed between knee kinematics obtained from this study and results obtained from previous studies. No significant differences in knee kinematics …
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The effects of ballet training on isokinetic strength, power, and muscular endurance
… or muscular endurance of the quadriceps or hamstrings after training. However, significant isotonic strength gains were found in the weight lifting group on leg press, leg curls, and leg extension exercises after the training sessions.
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