Question

which muscles contract and relax while lifting a heavy object from the ground?​

Answer 1

Answer

There are two groups of muscle sets which are involved in lifting, the biceps and triceps muscles when triceps muscle contract then biceps muscles relaxes that cause the straightens the arms when biceps muscle contract and triceps muscles relax then hand lift.

Answer 2

Answer:

When we lift something heavy from the ground Biceps muscle contracts and the triceps muscle relaxes.

Explanation:

Muscles are primarily responsible for changing and holding the posture, movement, and tendency of an internal organ, like contraction of the heart and peristalsis motion of the digestive tract.

Two groups of muscle sets are involved in lifting, the biceps and triceps muscles, when the biceps muscle relaxes the triceps muscle contracts and the arm straightens. As triceps muscles are not as strong as the biceps, it does not have to exert great power to straighten the arm.

So, the biceps apply pressure to straighten the arms and lift a heavy object.

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