The purpose of a repetition is to create tension in the muscle through a full range of motion, that when repeated throughout a set, would fatigue a muscle. There are additional considerations in performing the repetition correctly.
- Minimize momentum by performing each repetition slowly and with control. Increasing the momentum takes tension off of the muscle. Taking tension off the muscle during a repetition is not only counterproductive, but also dangerous.
- Pausing in the position of full muscle contraction minimizes the momentum.
- Emphasizing the negative or lowering portion of the repetition keeps tension on the muscle. If the weight is allowed to fall or drop, then only half the possible work is being performed with each repetition. Maximizing the negative cuts the amount of repetitions in half.
- Body position influences leverage, and can also expose lifters to injury. Arching the back and other forms of poor technique may allow the lifter to move more weight, but often these poor forms lead to muscle strains and joint sprains.