The ability of your joints to move the way that they’re supposed to move is called flexibility. Long muscles and tendons allow you to have good flexibility. Stretching, using the types of static stretches and PNF stretches described in the text, is the best way to stretch muscles and tendons and improve flexibility.
The best time to do your stretching is when the muscles are warm. Many experts recommend that you do your stretching program after you have been exercising for at least 5 to 10 minutes. Warm muscles stretch more easily than cold muscles, so your program will be more effective if you do your stretching after doing other exercise.
The warm-up before your exercise program is not the same thing as a stretching program or workout that you do as part of your total exercise program.