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The Journal of Sports Medicine and Physical Fitness 2020 Jun 30

DOI: 10.23736/S0022-4707.20.10962-9

Copyright © 2020 EDIZIONI MINERVA MEDICA

lingua: Inglese

Rotational flywheel training in youth female team sport athletes: could inter-repetition movement variability be beneficial?

Jorge AREDE 1, 2 , Oliver GONZALO-SKOK 3, Chris BISHOP 4, Wolfgang I. SCHÖLLHORN 5, Nuno LEITE 1

1 Research Center in Sports Sciences, Health Sciences and Human Development, CIDESD, University of Trás-os-Montes and Alto Douro, Vila Real, Portugal; 2 School of Education, Polytechnic Institute of Viseu, Viseu, Portugal; 3 Faculty of Health Sciences, University of San Jorge, Zaragoza, Spain; 4 Middlesex University, London, UK; 5 Institute of Sports Science, Johannes Gutenberg University Mainz, Mainz, Germany


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BACKGROUND: The aim of this study was to analyse the effects of an inter-repetition variable rotational flywheel training program (Variable) over standard rotational flywheel training (Standard).
METHODS: Twenty-four youth female team-sports players were randomly assigned to both training groups (Variable, n = 12; Standard, n = 12), which consisted of 1 set of 3 rotational flywheel exercises x 10-12 repetitions, biweekly for a period of 6-weeks. The participants included in Variable group were instructed to perform the movement randomly in one of the three directions (0o, 45o right, and 45o left). Measurements included reactive strength, jumping, change of direction, and sprinting tests; patellar tendon condition was also assessed.
RESULTS: Substantial improvements were found in vertical jump with left leg (16.9%), lateral jump with right leg (13.6%), and patellar condition in left leg (4.1%) for Standard group, but also in reactive strength index in right leg landing (33.9%), vertical jump with right (10.1%) and left leg (12.0%) for Variable group. A significant interaction effect (group x time) wasobserved on patellar condition in right leg (F = 10.02, p < 0.01, η 2 = 0.37), favoring Variable group.
CONCLUSIONS: Rotational flywheel training programs were beneficial for youth-female team-sports athletes, although the movement variability may play a key role to develop different and specific physical adaptations.


KEY WORDS: Variability; Resistance training; Injury prevention; Between-limbs asymmetry

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