The increased flexibility protects muscles and tendons against possible injuries such as pulls and tears. The best exercises for flexibility are low-intensity cycling, walking, calisthenics, dance, and yoga. Flexibility is also aided by warmth. So work out in a warm environment. Do your stretching in a sauna, steam room, or whirlpool bath.
Massage also helps restore flexibility.
It's important for you to remember that stiffness didn't happen overnight, so don't expect to become flexible overnight. If you try too hard and work too fast, you may injure muscle or tendon tissue. Do your stretching and flexibility exercises slowly and gently at first and gradually intensify them.