Abstract
Several studies have confirmed the efficacy of flywheel training, mainly in the bilateral half-squat exercise. The aim of the present study was to analyze the effects of single-leg Romanian deadlift flywheel training on speed, jumping and change of direction performance. Seventeen young healthy males underwent two periods of 3-week training based on two weekly sessions of 3 sets × 7 repetitions or 4 sets × 7 repetitions of single-leg Romanian deadlifts (0.037 kg/m² moment inertia) with their dominant and non-dominant leg. After the first three weeks of the program, the CMJ, the 10 m, 30 m and total sprint times, as well as the COD-90 test, presented likely substantial beneficial effects and a small decrease in the relationship between the sprint and COD-90 test performance. After the second period of the three-week training, likely detrimental effects were observed in some of the change of direction conditions and an increase in the relationship between the sprint and the COD-180 performance. It could be hypothesized that most of the flywheel training effects reported in the traditional protocols lasting a minimum of 5–6 weeks would occur in the first weeks of training.
Highlights
Different training devices, such as flywheel(s), have been developed and extensively used in recent years to improve several aspects of strength and power related to sport performance [1]
Several studies have confirmed the efficacy of flywheel training devices for improving hypertrophy [5], power [6], countermovement jump (CMJ) performance [4,7,8], 10 m sprint time and changes of direction (COD) [4,7,8,9], and injury prevention or rehabilitation [4,10,11]
CMJ, the 10 m, 30 m and 30 m total sprint time m (TT) 30 m sprint times, and all COD-90 tests likely presented substantial beneficial effects after the first three weeks of the training program based on single-leg Romanian deadlifts on a flywheel device
Summary
Different training devices, such as flywheel(s), have been developed and extensively used in recent years to improve several aspects of strength and power related to sport performance [1] These devices are designed to provide resistance by the torque generated by rotating flywheels during acceleration (concentric) and breaking (eccentric) movement phases. Both eccentric and concentric strength are key components in almost any sport activity (i.e., sprint acceleration, jumping, change of direction, etc.) [2], especially those that require the generation of force over a short period of time [3]. There is some approach in the literature to establish guidelines [12,13], there is still a lack of specific information that makes it difficult to prescribe and control training programs using flywheel devices
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