An exercise for the stomach muscles. You lie on your back with your knees bent and your feet flat on the floor, then curl your body up until you are sitting, then lie back down. That is one sit-up.

for the stomach muscles練腹部肌肉的 An exercise一種運動。You你 lie on your back仰躺，with your knees bent膝蓋彎曲、your feet flat on the floor雙腳平放在地板上，then再 curl your body up把身體捲起來，until you are sitting直到坐起，then再 lie back down躺回去。That那 is one sit-up就是一下仰臥起坐。

People almost always count them, so the word is almost always plural: fifty sit-ups, a hundred sit-ups. The verb you use with it is do — do twenty sit-ups. Not make, not play.

People人們 almost always幾乎都在 count them數次數，so所以 the word這個詞 is almost always plural幾乎都是複數：fifty sit-ups五十下、a hundred sit-ups一百下。you use with it跟它搭配 The verb的動詞 is是 do——do twenty sit-ups做二十下仰臥起坐。Not不是 make，not也不是 play。

Note the hyphen: the noun is sit-up, while the plain verb sit up means to move from lying to sitting ("He sat up in bed"), or to stay awake late ("I sat up until two waiting for her"), or to suddenly pay attention ("That news made everyone sit up").

Note注意 the hyphen連字號：the noun名詞 is是 sit-up，while而 the plain verb一般動詞 sit up means意思是 to move from lying to sitting從躺著變成坐著（"He sat up in bed"他在床上坐了起來），or to stay awake late或熬夜不睡（"I sat up until two waiting for her"我等她等到兩點沒睡），or to suddenly pay attention或突然注意起來（"That news made everyone sit up"那消息讓所有人都坐直了）。

A close relative is the crunch, a smaller version where only your shoulders come off the floor; gyms and PE teachers now often prefer crunches, because full sit-ups can be hard on the lower back. In daily talk, though, most people still say sit-ups for both.

A close relative一個近親 is是 the crunch捲腹，a smaller version一種小一點的版本，where only your shoulders come off the floor只有肩膀離開地板；gyms and PE teachers健身房和體育老師 now現在 often prefer常常更喜歡 crunches捲腹，because因為 full sit-ups完整的仰臥起坐 on the lower back對下背 can be hard可能有負擔。though不過 In daily talk日常講話時，most people大多數人 for both兩種都 still say還是說 sit-ups。