They are subject to hard training.

他们必须接受高强度训练。

Cross Fit is known as one of the hardest training programs in the exercise world.

全面强健是健身界最难的训练项目之一。

Mr. Hutchins says that children's bodies are not made for hard training until they are 15 or 16 years old.

哈钦斯先生说，孩子们的身体在十五六岁之前是不适合进行高强度训练的。

CrossFit is known as one of the hardest training programs in the exercise world. A good word to describe that is -- hardcore.

全面健身是健身界最难的一种训练项目之一，“强悍”一词可以很好地描述这种健身方式。

However, the primary concern of every player, after hard training for a year or two, is to win the game.

但是，经过一两年的艰苦训练， 每个球员最关心的是赢得比赛。

There's some evidence that if you're not always familiar or accustomed to exercising, exercising with really hard training before you go to bed is very stressful for the body.

有证据表明，如果你不总是熟悉或习惯于锻炼，那么在睡觉前进行高强度的锻炼对身体来说是非常有压力的。

Well, I'm not sure about the Zombie boot camp – a boot camp is a short course of hard physical training – but the Sherlock Holmes awayday sounds like fun.

呃，我不确定我会不会喜欢僵尸训练营。训练营是进行艰苦的体能训练的场地。但是《神探夏洛克》听起来不错。

In the 2017, I remember like training so hard because I was going to be on Grammys and I used to listen to this song and imagine myself walking into the red carpet of Grammys and winning that Grammy.

2017年的时候我疯狂健身，因为要参加格莱美奖颁奖典礼，当时我就经常听这首歌，想象自己走上格莱美奖的红地毯，赢得格莱美奖项。