Sit-ups once ruled as the way to tighter abs and a slimmer waistline. Now planks — exercises in which you assume a position and hold it — are the gold standard for working your core.
Will doing sit ups tone my stomach? - Quora
Hard Core Training for Hard Work
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美军叫停仰卧起坐!中国人是否应该取消这项错误运动?
Will I lose stomach weight if I do 200 sit-ups a day? - Quora
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Hard Core Training for Hard Work
If I do only 40-50 push-ups every day, will it help me lose weight? - Quora
Does doing sit ups everyday help? - Quora
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