Effects of Variable Resistance Using Chains on Bench Throw Performance in Trained Rugby Players

Area of Science:

• Sports Science
• Biomechanics
• Strength and Conditioning

Background:

• Variable resistance training is increasingly utilized to enhance athletic performance.
• Chains offer a method to progressively increase resistance during an exercise movement.

Purpose of the Study:

• To investigate the acute effects of adding chain resistance to the bench throw exercise.
• To compare bench throw performance metrics between constant and variable resistance conditions in trained rugby players.

Main Methods:

• Eight male rugby union players participated in a randomized crossover study.
• Participants performed bench throws at 45% of their one-repetition maximum (1RM) under two conditions: constant load and variable load (chains).
• Key performance variables including peak/mean velocity, peak power, and peak acceleration were measured.

Main Results:

• While peak and mean power differences were trivial, bar velocity and acceleration were significantly enhanced with chain resistance.
• Greater bar velocity was observed between 50 and 400 ms from initiation in the chain condition.
• Bar acceleration was very likely greater when using chains.

Conclusions:

• The inclusion of chain resistance can acutely improve specific performance variables during the bench press throw.
• Variable resistance training with chains may be a beneficial addition to training programs for athletes.