The potential for variable range of motion training to optimise functional performance

"Although full range of motion (ROM) resistance training is a successful method of enhancing force potential, it does possess a number of limitations such as terminal deceleration and the countermovement occurring at the same position during all repetitions. In an effort to overcome these drawbacks, this thesis explored the effects of variable range of motion (VROM) resistance training on neuromuscular performance, activation and muscle architecture. This method of training involves the countermovement position occurring in a different ROM for each set. Experiment 1 consisted of a study examining the load lifted, force produced and concentric workload during a VROM training session. The findings of this study suggested that VROM training results in increased peak force levels as the training ROM decreased, a potential foundation for enhanced longitudinal performance benefits. A potential mechanism for these proposed gains in response to VROM training appeared to be a change in muscle architecture. Therefore, Experiment 2 examined the relationship between muscle architecture and upper body pressing strength and power in 30 professional rugby league players. The results of this study revealed that while changes in pennation angle were originally believed to be a potential mechanism for performance gains in response to VROM training, the limited relationship between this variable and function suggested otherwise. Finally, Experiment 3 examined the effect of VROM training on strength, power, neuromuscular activation and muscle architecture in 22 professional rugby league players. The results of this final study revealed that VROM training produced enhanced full ROM ballistic performance and isokinetic strength towards the terminal phase of the bench press movement. These findings suggest that a VROM training program provides superior performance gains in subjects with extensive resistance training experience, and is therefore a worthy addition to a high level athletes training program." -- abstract