1.
The thing about it is to help build people's body and keep healthy.
目的在于帮助人们锻炼体魄，保持健康。
2.
Physical recreation affords us the opportunities to strengthen our bodies.
体育锻炼可使我们有机会强健体魄。
3.
Exercising the body is as important as exercising the mind.
锻炼身体与锻炼心灵一样重要。
4.
Do you work out? How often?
你锻炼身体吗？多长时间锻炼一次？
5.
lose(weight)through strenuous exercise
（通过努力锻炼）减轻（体重）
6.
Running exercise can keep down weight
跑步锻炼，能减轻体重。
7.
Train hard and defend the motherland;
锻炼身体，保卫祖国;
8.
and exercises for about half an hour.
然后锻炼身体半小时。
9.
Train hard and build the motherland.
锻炼身体，建设祖国。
10.
He does exercises to develop his muscles.
他锻炼身体使肌肉发达。
11.
No. They are just exercising.
对。她们只是在锻炼身体。
12.
No, I have no time to exercise.
不，我没有时间锻炼身体。
13.
He does exercises every day in the morning.
他每天早上锻炼身体。
14.
Do you often work out
你经常锻炼身体吗?
15.
Exercise will firm up your muscles.
锻炼身体能使肌肉结实.
16.
He persists in physical training all the year round.
他常年坚持体育锻炼。
17.
he recommended exercise to reduce my adiposity.
体育锻炼可以克服肥胖。
18.
Exercise makes one sweat.
体育锻炼能让人出汗。