Flexibility training is possibly the least popular and the most underrated element of tennis fitness training. Even though you might have heard a lot of contradicting opinions about the importance of stretching in the injury prevention, it is obvious that the flexibility of the muscles and joints plays an important roll in any athletic movement. The muscles that are not tight can move more efficiently and in a bigger range of motion resulting in better performance and less injuries, because the limb can move further before an injury would occur. A flexible athlete is a supple athlete. With better flexibility your movement and agility on the court will improve. Another benefit of flexibility training is that the stretched muscles get more relaxed, and with relaxed muscles, it is easier to learn new skills. Your body awareness will increase and that itself will help with your movement and performance.
In life the greatest handicap is fear, the hardest thing to do is to begin, the most useless asset is pride, the scariest thing to do is change and the biggest mistake is giving up!