sit-up

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Right shoulder joint from the front.

sit-up

exercise of abdominal muscles, in which the subject lying on the floor raises the upper body towards vertical before lowering again; importantly, for safety, should be performed with knees bent to approximate right angle, when the target becomes touching of elbows to knees. aka trunk curl although this term is sometimes reserved for the particular case where chin is pressed against chest during the upper-body elevation.
References in periodicals archive ?
Perform as many sit ups as you can in the time it takes to boil the kettle.
And after plucking the title for the most sit ups in five minutes from US endurance athlete James Clark, he carried on to pick up the title in the ten, fifteen and thirty minute categories.
The burly college lecturer, who teaches the Access to the Military Course at Solihull College, managed to complete 211 sit ups in five minutes with a 50lb weight on his chest.
An inexpensive dumbbell set and enough room to do push ups and sit ups are all you need for a good strength-building routine.
Paddy, who moved to Balsall Common from Sheldon almost four years ago, is training hard for the challenges with a gruelling fitness regime, which sees him running five miles, rowing 10,000m, cycling five miles, completing 500 press ups and 500 sit ups, six days a week.
doing sit ups with your knees bent will isolate your tummy muscles more, and protect your back.