antagonistic muscles:
pairs of muscles that move parts of the body in opposite directions

posture:
the way you hold your body when you stand or sit

varicose veins:
veins in the body, usually the legs, which have been stretched out of shape and do not move blood through the body effectively anymore

Antagonist and agonist muscles often occur in pairs, called antagonistic pairs. As one muscle contracts, the other relaxes. An example of an antagonistic pair is the biceps and triceps; to contract - the triceps relaxes while the biceps contracts to lift the arm

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antagonistic muscles: pairs of muscles that move parts of the body in opposite directions posture: the way you hold your body when you stand or sit varicose veins: veins in the body, usually the legs, which have been stretched out of shape and do not move blood through the body effectively anymore

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