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Open AccessArticle

Relationship between Cyclic and Non-Cyclic Force-Velocity Characteristics in BMX Cyclists

by Micah Gross 1,* and Thomy Gross 2
1
Swiss Federal Institute of Sport, 2532 Magglingen, Switzerland
2
Department of Medicine, Movement and Sport Science, University of Fribourg, 1700 Fribourg, Switzerland
*
Author to whom correspondence should be addressed.
Sports 2019, 7(11), 232; https://doi.org/10.3390/sports7110232
Received: 3 October 2019 / Revised: 4 November 2019 / Accepted: 6 November 2019 / Published: 9 November 2019
(This article belongs to the Special Issue Applied Sport Science for Elite Athletes)
Especially for bicycle motocross (BMX) cyclists, transfer of muscular force-velocity (Fv) characteristics between common strength training exercises and cycling is important. This study investigated the relationship between Fv characteristics in a common training exercise (squat jumps) and a sport-specific task (cycling) in high-level BMX racers by exploring the degree to which Fv and torque–cadence (Tc) characteristics correspond. Twelve BMX racers performed an Fv (multiple loaded squat jump) and two Tc tests (ramp starts and flat-ground sprints). Results revealed very large correlations between F 0 and T o r 0   s t a r t (r = 0.77) and between P m a x   j u m p and P m a x   s t a r t (r = 0.85). On the other hand, the relationships between v 0 and C a d 0   s t a r t (r = –0.25) and between S F v and S T c   s t a r t (r = –0.14) were small and negative. Similar results were observed for sprints. Based on dichotomous classifications (greater or less than group median), several discrepancies occurred, particularly for the profile slopes and high-speed variables. Thus, we recommend performing both jump-based and cycling-specific F v testing. Of additional note, T c characteristics on flat ground were similar to, but slightly different from those on the start ramp. Therefore, where possible, Tc tests should be carried out on a ramp. View Full-Text
Keywords: torque; power; sprint cycling; vertical jump; profile torque; power; sprint cycling; vertical jump; profile
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Gross, M.; Gross, T. Relationship between Cyclic and Non-Cyclic Force-Velocity Characteristics in BMX Cyclists. Sports 2019, 7, 232.

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