Alteration of swing leg work and power during human accelerated sprinting
نویسندگان
چکیده
منابع مشابه
Alteration of swing leg work and power during human accelerated sprinting
This study investigated changes in lower-extremity joint work and power during the swing phase in a maximal accelerated sprinting. Twelve male sprinters performed 60 m maximal sprints while motion data was recorded. Lower-extremity joint work and power during the swing phase of each stride for both legs were calculated. Positive hip and negative knee work (≈4.3 and ≈-2.9 J kg-1) and mean power ...
متن کاملKinematics of transition during human accelerated sprinting
This study investigated kinematics of human accelerated sprinting through 50 m and examined whether there is transition and changes in acceleration strategies during the entire acceleration phase. Twelve male sprinters performed a 60-m sprint, during which step-to-step kinematics were captured using 60 infrared cameras. To detect the transition during the acceleration phase, the mean height of ...
متن کاملCharacterizing Swing-Leg Retraction in Human Locomotion
Swing-leg retraction, the backward rotation of the swing leg just prior to ground contact, is observed in human locomotion. While several advantages of swingleg retraction, like gait stability and perturbation rejection, are shown by conceptual models, there is currently very little experimental data on swing-leg retraction in human motion. In this paper, kinematic data for twenty-eight subject...
متن کاملEnergetic cost of producing cyclic muscle force, rather than work, to swing the human leg.
We compared two hypothesized energetic costs for swinging the human leg quickly. The first cost is to perform mechanical work on the leg, and the second is to produce muscle force cyclically at high frequencies. Substantial metabolic energy is expended to perform isolated leg swinging, especially at rates greater than the leg's natural pendular frequency. To determine whether the production of ...
متن کاملPosterior Leg Bruising After Sprinting
A 48-year-old male presented to the emergency department with enlarging regions of ecchymoses over the posterior aspect of both legs (Figure 1). Four days earlier he had the sudden onset of severe achy hamstring pain during a 50-yard sprint. He denied weakness, similar prior episodes, or bleeding abnormalities. Both lower extremities had full range of motion, no loss of strength, a normal knee ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Biology Open
سال: 2017
ISSN: 2046-6390
DOI: 10.1242/bio.024281