Why two muscles are needed to bend and straighten a joint?

Why two muscles are needed to bend and straighten a joint?
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Description : Instructions for the patient with low back pain include which of the following? a) When lifting, avoid overreaching. Instructions for the patient with low back pain should include that when lifting, ... lifting, the patient with low back pain should bend the knees and tighten the abdominal muscles.

Last Answer : a) When lifting, avoid overreaching. Instructions for the patient with low back pain should include that when lifting, the patient should avoid overreaching. The patient should also keep the load close to the ... muscles, use a wide base of support, and use a back brace to protect the back.

What happens during isokinetic exercise Muscles contract at a constant rate. Muscles contract and relax to move a joint. Muscles do not contract at all. Muscles contract with very little body movement.?

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Last Answer : Muscles contract and relax to move a joint. ... Muscles contract at a constant rate. Muscles contract and relax to move a joint.

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