Q.Differentiate between active flexibility and passive flexibility.

Flexibility is the range of motion available at a joint, and it can be developed or expressed in two distinct ways depending on whether the movement is self-generated or assisted.

Active flexibility is the range of motion achieved using only the contraction of your own muscles, without any external help. When you lift your leg forward and hold it high using your hip flexors and quadriceps alone, you are demonstrating active flexibility. The limiting factor here is the strength of the agonist muscles (the ones doing the lifting) and the ability of the antagonist muscles (the ones being stretched) to relax and lengthen. Active flexibility is generally smaller in range than passive flexibility because it depends entirely on your muscular effort.

Passive flexibility, on the other hand, is the range of motion achieved with the help of an external force—a partner, gravity, a stretching strap, or your own hand pulling a limb. If a partner pushes your leg higher than you can lift it yourself, you are displaying passive flexibility. Because an outside force assists the stretch, passive flexibility typically allows a greater range of motion than active flexibility. The limiting factor is the extensibility of the soft tissues (muscles, tendons, ligaments) rather than muscular strength. …

Flexibility is not a single quality but exists in two distinct forms, and understanding the difference matters because each type develops differently, serves different athletic needs, and carries different injury risks.

Active flexibility is the range of motion you can produce and control entirely through your own muscular effort. When you lift your leg forward into a high kick without touching it, or hold your arm overhead in a fully extended position using only shoulder strength, you are demonstrating active flexibility. The limiting factors here are twofold: the strength of the agonist muscles (the ones doing the moving) and the ability of the antagonist muscles (the ones on the opposite side) to relax and lengthen. A gymnast holding a split in the air, unsupported, relies on active flexibility.

Passive flexibility, by contrast, is the range of motion you can achieve when an external force assists the movement. That force might be a partner pushing your leg higher in a stretch, gravity pulling your torso down in a forward bend, a strap drawing your arm into deeper rotation, or even the momentum of a swing. Because you are not fighting against the resistance of weak agonists, passive flexibility is almost always greater than active flexibility in the same joint. When you sit in a straddle split on the floor and let gravity and your body weight deepen the stretch, you are using passive flexibility.

The gap between the two reveals something important: active flexibility depends on strength as much as on muscle length. You might be able to passively stretch your hamstrings until your nose touches your knees, but if your hip flexors and quadriceps are weak, you will not be able to actively lift that leg anywhere near as high. This is why dancers and martial artists train both: they need the passive range for certain positions, but they need the active range to move into and hold those positions under control.