What is "chin-ups"

Usage examples of "chin-ups".

Her twelve hadn't taken a third as long as his forty-two, and when Esau had finished his chin-ups, Fong had ordered him to do fifty pushups for the backflash.

He told the master sergeant how many chin-ups he'd done, and about the fifty pushups, not withholding what they'd been for.

Then, driven by barking second-tier cadre, they ran hard to the chin-up bars, a bar per man, where they alternated between sets of ten chin-ups, fifteen pushups, and thirty side-straddle hops, each exercise serving as rest from the one before.

Sixty feet away, the trainees were doing their pre-supper chin-ups before going in, callused fists gripping wet bars without a sign of slippage.

As a boy in New Jersey, he made himself strong from chin-ups, push-ups and maniacal repetitions with free weights he constructed from cinder blocks and mop or broom handles.