We define flexibility as the degree to which the muscles, tendons, and connective tissue around the joints can elongate and bend. There are several types of flexibility. Static flexibility describes the amount of motion you have around a joint or series of joints while at rest. Dynamic flexibility refers to the active motion about a joint or series of joints and represents the amount of movement a player has available for executing serves, groundstrokes, and volleys.

Flexibility is essential for two very important reasons. First, it can lessen the risk of injury. Second, it can allow for a faster muscular contraction and, therefore, produce more power.

There are two types of stretching to focus on for tennis: static and dynamic.

Static stretching involves slow, isolated, smooth movements and passively holding the extreme range. This type of stretching is highly recommended as it is the most practical and effective method and can improve flexibility safely. Done correctly, it requires little energy, creates minimal danger and no soreness, and it is best after playing.