noun
EXAMPLES FROM CORPUS
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An acute attack of dizziness while doing my sit-ups.
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Before you think it's too late to do those sit-ups, though, think again.
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He also did sit-ups, but not in front of me.
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I could get away with only forty twist sit-ups.
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The sit-ups start with the back off the board, and end before the upper body reaches the vertical position.
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Then he did exercises he had learned in the Armystraddle jumps, deep knee bends, sit-ups and push-up.
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Toe touches and sit-ups should be avoided; they are particularly harmful to anyone who has osteoporosis in the spine.