An athlete’s ability to demonstrate consistent physical high performance under vigorous challenge and stress.

The ability to perform work with the least mechanical energy cost possible.  To be an efficient mover one must be able to produce, reduce, apply and stabilize force throughout the body from toenails to fingertips.

Being off balance, under fatigue or in a tackle are commonplace for athletes. Maintaining stable motor-patterns in all scenarios is a requirement for peak performance, and injury prevention.