"Strength is an excellent example of a physical characteristic that drives improvement in other athletic parameters. More strength means more power, more endurance, better coordination, and better everything else. This is why, all other things being equal, the stronger athlete is the better athlete."

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A sexual athlete is not likely to find sufficient energy for work of another athletic kind, and the acting of great parts most definitely was and always will be athletic, depending on inner if not on visible energy. Members of other professions that depend on the expenditure of physical energy must, I believe, find similar difficulties when attempting to double up on their energies. One has often heard that the most magnificent specimens of boxers, wrestlers and champions in almost every branch of athletic sport prove to be disappointing upon the removal of that revered jockstrap.

— Laurence Olivier