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Full-Text Articles in Life Sciences
Active Versus Passive Control Of Arm Swing: Implication Of The Restriction Of Pelvis Rotation During Human Locomotion, Stephen Paul Canton
Active Versus Passive Control Of Arm Swing: Implication Of The Restriction Of Pelvis Rotation During Human Locomotion, Stephen Paul Canton
LSU Master's Theses
To date, it remains unclear how passive dynamics and active neural control contribute to arm swing during human locomotion. The passive hypothesis attributes arm swing to the passive transfer of energy from the legs to the arms via biomechanical linkages, while the active hypothesis states that arm swing is actively driven by muscles via neural mechanisms. The present study aims to investigate this phenomenon further by disrupting the biomechanical linkages, thereby directly challenging the passive hypothesis. Ten healthy individuals walked on a treadmill with and without an apparatus that constrained pelvis rotation at 3 different speeds (2 mph, 3 mph, …
Effects Of Exercising With A Weighted Vest On The Output Of Lower Limb Joints In Countermovement Jumping, Behdad Tahayori
Effects Of Exercising With A Weighted Vest On The Output Of Lower Limb Joints In Countermovement Jumping, Behdad Tahayori
LSU Master's Theses
The effect of exercising with a weighted vest equal to 15% of body mass on vertical jump height was assessed. It was hypothesized that the defined treatment protocol could enhance jumping performance by increasing hip, knee and ankle joint power. The findings of this study showed that the defined active stretching protocol significantly increases jump height in male participants (0.3364 m compared to0. 3456 m from pre to post exercise respectively) but did not yield a significant increase in females. No significant changes in joint angle, torque, power or velocity were observed between the pre and post exercise jumping. However, …
Coordination Of The Lower Extremity Muscles During Gait Transitions, Lorna Louise Ogden
Coordination Of The Lower Extremity Muscles During Gait Transitions, Lorna Louise Ogden
LSU Master's Theses
Often the approach to investigating muscular coordination during transitions entailed conducting tests at speeds held constant. This study investigated muscular activity during continuously changing speeds in order to further detail and quantify neuromuscular changes during gait transitions. Twelve healthy adults, 18-41 years of age, were recruited as participants. Informed consent was obtained. Gait transitions were induced by the speed of the treadmill changing with constant acceleration. Reflective markers were placed on anatomical landmarks of the hip, knee,ankle, heel, and 5 th metatarsal joint. Bipolar surface electrodes were positioned on the subjects’skin over the muscular bellies of the gluteus maximus (GM), …