Correct

强身

/ qiángshēn / 
Strokes

Definition

to strengthen one's body/to keep fit/to build up one's health (through exercise, nutrition etc)

Example

As a Verb

build up a good physique; improve one's health

1
Xíwǔ
习武
qiángshēn
强身

practise martial arts to improve one's health

2
Tǐyù
体育
qiángshēn
强身

improve one's health by doing sport

3
Qiángshēn
强身
yìshòu
益寿

build up one's health and prolong one's life

4
Qiángshēnjiàntǐ
强身健体

build up a good physique and improve one's health