Flexibility Exercises This phase of exercise follows immediately after warm-up. It is done by doing gradual stretching activities from upper to lower extremities. There are different types of stretching to improve flexibility: static, and dynamic stretching Static stretching is more appropriate in the cool down as they help muscles to relax, realign muscles fibers and re-establish their normal range of movement. Dynamic stretching exercises specifically prepare the muscles for active contraction. However, they do not cause long-term improvement in flexibility because of the short stretching time. 7​