Speed of Movement

Use a smooth, controlled motion during all phases of the lift. This deliberate rep speed produces the greatest results for bodybuilding purposes. Super-fast reps with ballistic movements and jerking can be harmful to muscles and connective tissues, while slow training accomplishes very little. In general, most bodybuilders use a formula that approximates a two-second positive contraction (raising the weight), a momentary squeeze of the muscle at the point of peak contraction, and a two-second negative contraction (lowering of the weight).