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Full-Text Articles in Life Sciences
Impact Of Seated And Standing Bicycle Riding Position On Subsequent Running Performance, Randall L. Jensen‡, Brendon J. Ewers†, Brian Cunniffe*, Brian Phelan*, Andrew J. Harrison‡, Amir Shafat‡
Impact Of Seated And Standing Bicycle Riding Position On Subsequent Running Performance, Randall L. Jensen‡, Brendon J. Ewers†, Brian Cunniffe*, Brian Phelan*, Andrew J. Harrison‡, Amir Shafat‡
International Journal of Exercise Science
This study examined the effects of cycling posture on subsequent running performance similar to the transition phase of a triathlon. Experienced, non-elite triathletes completed two trials of a cycle-run transition. During the last three minutes of a 30 minute cycling bout, at power output equal to lactate threshold, subjects either remained seated (SEAT), or alternated seated and standing cycling (30 s at a time; ALT). Heart rate, RPE, minimum and maximum knee angle, stride frequency and length, and onset and duration of quadriceps and hamstrings activity were obtained at the end of a three-minute control run and at minutes 0, …
Forearm Emg During Rock Climbing Differs From Emg During Handgrip Dynamometry, Phillip B. Watts, Randall L. Jensen, Edward Gannon, Randy Kobeinia, Jeremy Maynard, Jennifer Sansom
Forearm Emg During Rock Climbing Differs From Emg During Handgrip Dynamometry, Phillip B. Watts, Randall L. Jensen, Edward Gannon, Randy Kobeinia, Jeremy Maynard, Jennifer Sansom
International Journal of Exercise Science
Grip force, as measured via handgrip dynamometry, is often given importance in the study of rock climbing performance. Whether handgrip dynamometry produces a degree of muscle activation comparable to actual climbing has not been reported. Furthermore, the degree and variability of muscle activation for various configurations during climbing are unknown. The purpose of this study was to record forearm EMG responses for six hand configurations during climbing and to compare these responses to a maximum handgrip test. Five experienced climbers signed informed consent to participate in the study. Subjects performed four moves up (UP) and down (DN) on an overhanging …