Search Results - "Gregor, R J"

Biomechanics of sprint running : a review by MERO, A, KOMI, P. V, GREGOR, R. J

“…Understanding of biomechanical factors in sprint running is useful because of their critical value to performance. Some variables measured in distance running…”
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Lower extremity dexterity is associated with agility in adolescent soccer athletes by Lyle, M. A., Valero-Cuevas, F. J., Gregor, R. J., Powers, C. M.

“…Agility is important for sport performance and potentially injury risk; however, factors affecting this motor skill remain unclear. Here, we evaluated the…”
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In vivo moment arm calculations at the ankle using magnetic resonance imaging (MRI) by Rugg, S G, Gregor, R J, Mandelbaum, B R, Chiu, L

“…In vivo moment arm lengths for the Achilles tendon and tibialis anterior (TA) were determined in 10 adult male subjects. Moment arms were measured as the…”
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Weight-bearing hindlimb stepping in treadmill-exercised adult spinal cats by Lovely, R G, Gregor, R J, Roy, R R, Edgerton, V R

“…Hindlimb locomotion on a motor-driven treadmill was studied in 5 cats spinalized at a low thoracic level adults. Six months after surgery, the cats were…”
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Effects of training on the recovery of full-weight-bearing stepping in the adult spinal cat by Lovely, R G, Gregor, R J, Roy, R R, Edgerton, V R

“…The effects of ambulatory training on the extent and time course of recovery of weight-bearing-stepping in cats spinalized (T12-T13) as adults were…”
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Intense Tai Chi Exercise Training and Fall Occurrences in Older, Transitionally Frail Adults: A Randomized, Controlled Trial by Wolf, Steven L., Sattin, Richard W., Kutner, Michael, O'Grady, Michael, Greenspan, Arlene I., Gregor, Robert J.

“…Objectives: To determine whether an intense tai chi (TC) exercise program could reduce the risk of falls more than a wellness education (WE) program in older…”
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Coordination of two-joint rectus femoris and hamstrings during the swing phase of human walking and running by PRILUTSKY, B. I, GREGOR, R. J, RYAN, M. M

“…It has been hypothesized previously that because a strong correlation was found between the difference in electromyographic activity (EMG) of rectus femoris…”
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A comparison of the triceps surae and residual muscle moments at the ankle during cycling by Gregor, R J, Komi, P V, Browning, R C, Järvinen, M

“…The rigid linked system model and principles of inverse dynamics have been widely used to calculate residual muscle moments during various activities. EMG…”
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Adaptive control for backward quadrupedal walking. IV. Hindlimb kinetics during stance and swing by Perell, K L, Gregor, R J, Buford, J A, Smith, J L

“…1. Hindlimb step-cycle kinetics of forward (FWD) and backward (BWD) walking in adult cats were assessed. The hindlimb was modeled as a linked system of rigid…”
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Mechanical energy management in cycling: source relations and energy expenditure by Broker, J P, Gregor, R J

“…Conservation of energy suggests that during cycling the constrained lower extremity is capable of delivering energy to the bicycle without expending energy to…”
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Biomechanical factors associated with shoe-pedal interfaces : implications for injury by GREGOR, R. J, WHEELER, J. B

“…The principal demand on the body during cycling is on the lower extremities as they are responsible for producing a majority of the energy imparted to the…”
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Swing- and support-related muscle actions differentially trigger human walk-run and run-walk transitions by Prilutsky, B I, Gregor, R J

“…There has been no consistent explanation as to why humans prefer changing their gait from walking to running and from running to walking at increasing and…”
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Relationship between ankle muscle and joint kinetics during the stance phase of locomotion in the cat by Fowler, E G, Gregor, R J, Hodgson, J A, Roy, R R

“…The purpose of this study was to examine the relationship between internal force production in selected skeletal muscles and the externally calculated joint…”
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Mechanical output of the cat soleus during treadmill locomotion: in vivo vs in situ characteristics by Gregor, R J, Roy, R R, Whiting, W C, Lovely, R G, Hodgson, J A, Edgerton, V R

“…To study the mechanical output of skeletal muscle, four adult cats were trained to run on a treadmill and then implanted under sterile conditions and…”
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Knee flexor moments during propulsion in cycling--a creative solution to Lombard's Paradox by Gregor, R J, Cavanagh, P R, LaFortune, M

“…The function of two joint muscles in the human lower extremity was studied during a cycling task with efficiency of their action discussed in light of…”
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Knee kinetics during functional electrical stimulation induced cycling in subjects with spinal cord injury : A preliminary study by FRANCO, J. C, PERELL, K. L, GREGOR, R. J, SCREMIN, A. M. E

“…The purpose of this preliminary study was to describe pedal effectiveness parameters and knee-joint reaction forces generated by subjects with chronic spinal…”
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Temporal and spatial features of gait in older adults transitioning to frailty by Kressig, Reto W, Gregor, Robert J, Oliver, Alanna, Waddell, Dwight, Smith, Webb, O’Grady, Michael, Curns, Aaron T, Kutner, Michael, Wolf, Steven L

“…Examining gait characteristics in older adults who are transitioning to frailty enhances our understanding of movement control in this fall-prone population…”
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Achilles tendon forces during cycling by Gregor, R J, Komi, P V, Järvinen, M

“…Cycling represents an activity, in which the leg extensor muscles have been thought to contract only concentrically. In the present investigation, the forces…”
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Electromyographic activity of cat hindlimb flexors and extensors during locomotion at varying speeds and inclines by Pierotti, D J, Roy, R R, Gregor, R J, Edgerton, V R

“…Electromyographic activity (EMG) was used to determine how hindlimb muscle activation patterns are modified as speed and incline of locomotion are varied in…”
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Analysis of muscle coordination strategies in cycling by Prilutsky, B.I., Gregor, R.J.

“…The functional significance of the stereotypical muscle activation patterns used in skilled multi-joint tasks is not well understood. Optimization methods…”
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