Question

1. how is mobility different from flexibility?

flexibility involves joint structures.
mobility is about passive stretching.
flexibility is about active movement.
mobility is about controlled joint movement.

1. how does flexibility contribute to injury prevention?

by reducing joint stress
by promoting muscle imbalances
by limiting range of motion
by causing muscle tension

1. what should be the intensity of static stretches?

painful
mild tension or discomfort
bouncing
rapid movements

Explanation:

1. Flexibility is the ability of a joint or series of joints to move through an unrestricted, pain - free range of motion. Mobility is the ability to move a joint through its full range of motion actively, which is about controlled joint movement. Passive stretching is more related to flexibility. Flexibility does involve joint structures but that does not distinguish it from mobility. And flexibility is about passive or active stretching (not just active movement).
2. Flexibility helps in reducing joint stress. Promoting muscle imbalances, limiting range of motion, and causing muscle tension are not positive contributions of flexibility to injury prevention.
3. Static stretches should be done with mild tension or discomfort. Painful stretches can cause injury. Bouncing and rapid movements are not characteristics of static stretches (bouncing is more related to ballistic stretches).

Answer:

1. Mobility is about controlled joint movement.
2. By reducing joint stress.
3. Mild tension or discomfort.