Using Sprint Velocity Decrement to Enhance Acute Sprint Performance

Cochrane, DJ and Monaghan, D. Using sprint velocity decrement to boost intense sprint operation. Currently, sled loading is decided from body mass (BM) per cent. It might be important to work with a percentage of maximum sprint reduction to ascertain a person’s load. The goal of this study was to determine if reduction in speed and sled loads at 35 will improve sprint performance that is 20-m. Additionally, electromyography (EMG) was evaluated to establish if any sprint-related improvements in velocity were due to changes in neural excitation. Twelve senior club male rugby union players achieved 2 and familiarization sled towing sessions employing cross-over, a randomized, and counter balanced design. Testing sessions included: base-line unresisted 20-m sprints, resisted sprint (35 and 55% decrease in speed ), and unresisted 20-m sprints in 2, 4, 6, 8, 5, 12, and 16 minutes. The sled load to reduce maximal velocity by 35% significantly improved 20-m velocity (p <0.05, effect size [ES] = 0.21) compared with all the heftier sled load (55% reduction in maximum speed ). A significant reduction in rotational velocity occurred at 12 minutes (p < 0.01, ES = −0.61) and 16 minutes (p 0.05). There was no shift in EMG. Reducing sprint speed offers an alternate process to ascertaining loading. Nonetheless, a greater variety of sprint speed must check when it is more effective than using BM percent procedure.
Address correspondence to Darryl J. Cochrane,
Copyright © 2019 by the National Strength & Conditioning Association.

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