9. Doing gyms may consume your strength.
做体操很耗体力。
还能这样说：
It can exhaust your vigour to do gyms.
You may consume great physical strength by doing gyms.
应用解析：
on the strength of 基于，依据;
in strength 在实力上;
with all one's strength 用全力
10. We start by doing limbering up exercises.
我们先做些柔软运动灵活四肢。
还能这样说：
Follow me to do preliminary exercises so as to stretch the muscles.
Warm up with stretching exercises before physical activity.
应用解析：
start in on sb. 开始责备某人;
start out of one's sleep 从睡梦中惊醒;
with a start 猛地，吃惊地;
start to one's feet 蓦地站起;
start for home 动身回家;
start on a task 着手工作
11. How often do you do gymnastics?
你多久做一次体操?
还能这样说：
How many times do you do gymnastics a week?
Can you tell me how often you do gymnastics?
谚语：
The cruelest lies are often told in silence.
最残酷的谎言常以沉默的方式说出。
12. If you want to decrease body fat, you must do gymnastics.
如果你想减肥，就必须做体操。
还能这样说：
You should do gymnastics to lose weight.
Doing gymnastics can help you slim down.
应用解析：
body and soul 全心全意的，完完全全的;
keep body and soul together 勉强维持生活;
in a body 全体;
over my dead body 用以表示对某事的强烈不满