plural sit-ups
: an exercise in which you lie on your back and use your stomach muscles to raise the top part of your body to a sitting position
She does 50 sit-ups every morning.
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“Sit-up.” Merriam-Webster.com Simple Definition, Merriam-Webster, https://www.merriam-webster.com/simple/sit-up. Accessed 24 Jun. 2026.
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