When lifting weights, arch your lower back for extra strength.

True
False

True

Explanation:

It is TRUE that When lifting weights, you arch your lower back for extra strength.

This is because arching the back assists the body to arrange the ball and socket in the shoulder such that the shoulder is well placed to enables you to utilize your body strength particularly the upper back to arrange your shoulder blades down and back into a safe position.

This in turn will help you to avoid lower back pain associated with carrying loads

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