The High Pull Exercise: A Comparison Between a Versapulley Flywheel Device and the Free Weight

The aim of this study was to examine the kinematics and kinetics (force, velocity and acceleration) and blood lactate concentration of the Versapulley (VP) device in comparison with free weight (FW) exercise at a similar external load. Fifteen rugby players randomly performed two training sessions of 6 sets of 6 repetitions with 20 s of recovery in between sets of the high pull exercise with the VP and the FW. Both training sessions were separated by 72 h. Barbell displacement (cm.), peak velocity (m/s), peak acceleration (m/s2), mean propulsive velocity (m/s), mean propulsive acceleration (m/s2), propulsive phase (%), mean and maximal force (Newtons) were continuously recorded during each repetition. Blood lactate concentration was measured after each training session (End), 3 minutes (3´later) and 5 minutes later (5´later). Barbell displacement (+4.8%, small ES), peak velocity (+4.5% small ES), mean propulsive acceleration (+8.8%, small ES), and eccentric force (+26.7, large ES) were substantially higher with VP than with FW. Blood lactate concentration was also greater after the VP exercise (End: +32.9%; 3´later: +36%; 5´later: +33.8 %, large ES). Maximal concentric force was substantially higher with FW than VP during the 6th set (+6.4%, small ES). Within the cohort and exercise investigated in the present study, VP training can be considered an efficient training device to induce an accentuated eccentric overload and augmented metabolic demands (i.e., blood lactate concentration).