Muscle size and density created by a program that includes heavy training low reps are easier to maintain for long periods of time, even with a minimum of maintenance training.

With high rep training only, much of growth is the results of transient factors such as fluid retention and glycogen storage, but MUSCLE made as hard as IRON through lifting heavy comes as a result of an actual increase in muscle fiber size.

The muscle cell walls themselves grow thicker and tougher, so they tend to resist shrinking. So I recommend a program of total development that includes a certain number of power training!