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The High-Pull Exercise: A Comparison Between a VersaPulley Flywheel Device and the Free Weight
International Journal of Sports Physiology and Performance
|October 6, 2016
Summary
The VersaPulley (VP) device offers enhanced eccentric overload and greater metabolic demand compared to free-weight (FW) exercises, as indicated by higher blood lactate concentrations. This makes VP training an efficient method for athletes seeking intensified training stimuli.
Area of Science:
- Sports Science
- Biomechanics
- Exercise Physiology
Background:
- Understanding the biomechanical and metabolic effects of different resistance training devices is crucial for optimizing athletic performance.
- The VersaPulley (VP) is a novel training device, and its comparative effectiveness against traditional free-weight (FW) exercises requires detailed kinematic and kinetic analysis.
Purpose of the Study:
- To compare the kinematics (displacement, velocity, acceleration) and kinetics (force) of high-pull exercises using the VersaPulley (VP) versus free-weights (FW) at similar external loads.
- To assess the impact of VP versus FW training on blood lactate concentration as a marker of metabolic demand.
Main Methods:
- Fifteen rugby players participated in two randomized training sessions, performing 6 sets of 6 repetitions of the high-pull exercise with either VP or FW, with 72 hours between sessions.
- Kinematic and kinetic data (displacement, velocity, acceleration, force) were continuously recorded during each repetition.
- Blood lactate concentration was measured immediately post-exercise and at 3 and 5 minutes post-exercise.
Main Results:
- The VersaPulley (VP) resulted in significantly higher barbell displacement, peak velocity, mean propulsive acceleration, and eccentric force compared to free-weights (FW).
- Blood lactate concentrations were substantially greater following VP exercise compared to FW exercise.
- Maximal concentric force was higher with FW during later sets, suggesting different force production characteristics.
Conclusions:
- The VersaPulley (VP) is an effective training device for inducing accentuated eccentric overload.
- VP training leads to augmented metabolic demands, evidenced by increased blood lactate concentration.
- VP exercise offers a distinct training stimulus compared to free-weight exercises, particularly regarding eccentric loading and metabolic stress.
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