2) “Train hard, train briefly, train infrequently,” Jones repeated over and over again. Not everyone agrees—most probably don’t—but I have followed that advice with great success for many years. The end result has been ~45-minute, one-set, whole-body weight workouts once or twice a week; split routines, according to Jones, make no more sense than eating or sleeping for a particular part of your body.
And that's all the people need to know. Unless you're young and on the sauce.