This article is from the Aerobics Fitness FAQ, by email@example.com (Robles) with numerous contributions by others.
According to Step Reebok guidelines, music should be played at
a speed of 118-128 BPM. At higher tempos, technique and safety are
SERIOUSLY compromised. It is impossible to get the full range of
motion that can be achieved at slower tempos. Because of this,
unlike in traditional floor aerobics, faster tempos do not
necessarily yield tougher workouts.