The purpose of this study was to compare kinematics of un-resisted and active resisted 30m sprints with different loads in experienced sprinters. kinematics were measured using laser gun, contact mat and IMUs integrated with a 3-axis gyroscope in fourteen participants during an un-resisted 30 m sprint and sprints with a 10, 20, 30 and 40% of body weight (BW) active resistance. The main findings were that 30m times increased with resp. 16, 31, 51 and 77% from 3.95±0.28 (un-resisted) to 6.99 ±0.85 s (40% BW resistance). These increases were caused by lower maximal velocity reached earlier in the 30m sprints. The lower maximal velocity was a result of shorter step length, flight time and longer contact times. These changes were accompanied with lower maximal knee and hip extension, and plantar flexion velocities with increasing resistance.
Van den Tillaar, Roland
"COMPARISON OF KINEMATICS ON 30 M SPRINTS WITH 0, 10, 20, 30 AND 40% BODY WEIGHT OF ACTIVE RESISTANCE IN EXPERIENCED SPRINTERS,"
ISBS Proceedings Archive: Vol. 37
, Article 116.
Available at: https://commons.nmu.edu/isbs/vol37/iss1/116