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Sled-push load-velocity profiling and implications for sprint training prescription in young athletes

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Author
Cahill, Micheál
Oliver, Jon
Cronin, John
Clark, Kenneth
Cross, Matt
Lloyd, Rhodri S.
Date
2020-01-16
Acceptance date
2019-06-08
Type
Article
Publisher
Lippincott, Williams & Wilkins
ISSN
1533-4287
Metadata
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Abstract
Resisted sled pushing is a popular method of sprint-specific training; however, little evidence exists to support the prescription of resistive loads in young athletes. The purpose of this study was to determine the reliability and linearity of the force-velocity relationship during sled pushing, as well as the amount of between-athlete variation in the load required to cause a decrement in maximal velocity (Vdec) of 25, 50 and 75%. Ninety (n=90) high school, male athletes (age 16.9 ± 0.9 years) were recruited for the study. All participants performed one un-resisted and three sled-push sprints with increasing resistance. Maximal velocity was measured with a radar gun during each sprint and the load-velocity relationship established for each participant. A subset of 16 participants examined the reliability of sled pushing on three separate occasions. For all individual participants, the load-velocity relationship was highly linear (r > 0.96). The slope of the load-velocity relationship was found to be reliable (CV = 3.1%), with the loads that cause a decrement in velocity of 25, 50 and 75% also found to be reliable (CVs = <5%). However, there was large between-participant variation (95%CI) in the load that caused a given Vdec, with loads of 23-42% body mass (%BM) causing a Vdec of 25%, 45-85%BM causing a Vdec of 50% and 69-131%BM causing a Vdec of 75%. The Vdec method can be reliably used to prescribe sled-push loads in young athletes, but practitioners should be aware that the load required to cause a given Vdec is highly individualized.
Journal/conference proceeding
Journal of Strength and Conditioning Research;
Citation
Cahill, M.J., Oliver, J.L., Cronin, J.B., Clark, K.P., Cross, M.R. and Lloyd, R.S. (2020) 'Sled-push load-velocity profiling and implications for sprint training prescription in young athletes', Journal of Strength & Conditioning Research.
URI
http://hdl.handle.net/10369/10607
DOI
https://doi.org/10.1519/JSC.0000000000003294
Description
Article published in Journal of Strength and Conditioning Research on 16 January 2020 (online), available at: https://doi.org/10.1519/JSC.0000000000003294.
Rights
http://www.rioxx.net/licenses/all-rights-reserved
Sponsorship
Cardiff Metropolitan University (Grant ID: Cardiff Metropolian (Internal))
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