A comparison between a Versa-Pulley flywheel and the free weight resistance during a 6x6 repeated power ability test
The majority of research concerning flywheel resistance has been performed with Teschs Yo-Yo technology. To date, there are few known peer reviewed journal articles investigating the VersaPulley device. The current research comparing Versapulley high-pull [VPHP] and Olympic barbell high-pull [OBHP] with standard velocity and relative load between both forms. The investigation hypothesizes that eccentric loading characteristic of the VersaPulley will increase metabolic demand and therefore be a more efficient and safer method of power endurance training.
Methods: 15 sub-élite rugby players performed totally 6x6 maximal sets, with 20 seg. of rest, on the Versapulley and in Olympic barbell high-pull. Peak force, mean force, time force, were measured in concentric and eccentric phase. Mean propulsive velocity, peak propulsive velocity, peak acceleration, mean propulsive acceleration and propulsive fase (%),was measured or calculated in concentric phase. Heart rate between sets and accumulated blood lactate immediately following the series of 6 sets, 3 and 5 minutes post-test, were measured
Results: The maximal concentric force was significant higher in the 6th set with barbell. The VP average eccentrics were significant higher in all sets. During the first 3 sets, versapulley force time is higher in concentric phase, and lower in eccentric phase, than with barbell. Peak velocity and mean propulsive acceleration were significant higher with versapulley than with barbell. The heart rate were significant higher with versapulley in all sets. The lactate concentration was higher in all measures too.
Discussion: The results of the study show that using versapulley we can produce the same concentric power and force than using free weight exercise, but higher values for the eccentric phase. VersaPulley will have greater accumulated blood lactate, heart rate and total work in the same magnitude of exercise when compared to free weights. Concentric displacement and eccentric loading characteristic of the VersaPulley will increase metabolic demand and therefore be a more efficient and safer method of power endurance training.
© Copyright 2012 17th Annual Congress of the European College of Sport Science (ECSS), Bruges, 4. -7. July 2012. Published by Vrije Universiteit Brussel. All rights reserved.
|Subjects:||sports game rugby training strength auxiliary device relation energy metobolism metabolism performance development|
|Notations:||training science strength and speed sports sport games|
|Published in:||17th Annual Congress of the European College of Sport Science (ECSS), Bruges, 4. -7. July 2012|
|Editors:||R. Meeusen, J. Duchateau, B. Roelands, M. Klass, B. De Geus, S. Baudry, E. Tsolakidis|
Vrije Universiteit Brussel
|Document types:||congress proceedings