Callisthenics are exercises you do with your own body, not with heavy gym machines. Push-ups, sit-ups, squats, jumping jacks, holding a plank, pulling yourself up on a bar — that family of moves. The aim is to make you strong and healthy by using your body as the weight.

Callisthenics are exercises you do with your own bodycallisthenics是用自己身體做的運動, not with heavy gym machines不是用沉重的健身器材. Push-ups伏地挺身, sit-ups仰臥起坐, squats深蹲, jumping jacks開合跳, holding a plank撐棒式, pulling yourself up on a bar拉單槓 — that family of moves就是這一類動作. The aim is目的是 to make you strong and healthy讓你變得強壯又健康 by using your body as the weight靠用你自己的身體當重量.

Schools, armies, and people who train in parks all use this kind of work.

Schools, armies, and people who train in parks學校、軍隊,還有在公園裡訓練的人 all use this kind of work都用這種訓練方式.

Though actually, the word can sound a little old or formal now; younger speakers often just say bodyweight training, or they name the move.

Though actually不過實際上, the word can sound a little old or formal now這個詞現在聽起來可能有點老派或正式; younger speakers often just say bodyweight training年輕人常常直接說bodyweight training(徒手訓練), or they name the move或直接說出那個動作的名字.

You will also see the spelling calisthenics (one L). That is the usual American spelling of the same word, not a different sport.

You will also see the spelling你也會看到這種拼法 calisthenics (one L)calisthenics(只有一個L). That is那是 the usual American spelling of the same word同一個詞常見的美式拼法, not a different sport不是不同的運動.