<P> Eccentric movement provides a braking mechanism for muscle and tendon groups that are experiencing concentric movement to protect joints from damage as the contraction is released . </P> <P> Eccentric training is particularly good for casual and high performance athletes or the elderly and patients looking to rehabilitate certain muscles and tendons . </P> <P> This movement has also been described as negative training . This "negative" movement is necessary to reverse the muscle from its initial trajectory . </P> <P> When weight exceeds the force developed by the muscle, as in an eccentric muscle action, the exercise is referred to as negative work because the muscle is absorbing energy in this loaded position . </P>

Which of the following is a muscle that is prone to lengthening