"每个星期我做两次运动。"

Translation: I exercise twice a week.

[EATandNAP]

"work out" should also be accepted for 'exercise."

[jamtintraders]

to "work out" is 锻炼

[Kivolamuzikisto]

In this context (doing physical movment) "exercise" and "work out" are often used interchangeably. 运动 has to do with motion while 锻炼 has to do with strengthening/ training, so "work out" is probably best covered by 锻炼 but that doesn't mean it shouldn't be accepted here.

[Guilhermealuz]

Totally agree

[strongjp]

"I exercise twice every week" should be an acceptable answer as well.

[ShannAwesome]

Twice a week isn't very much exercise buddy

[Cat722536]

So what is the difference between "运动" and "锻炼" ? Both have meant exercise. I understand "锻炼" is also to work out, but it also meant exercise.

Is the first word a noun and the second one a verb? Why don't we need to place a "的" before the activity. Is it not necessary if we use "次" ?

[BurtHood]

I thought exercise was 行使.

[Kivolamuzikisto]

行使 is more like "exercise ones power/ ability" or "perform/ show what you can do"

[Eric492387]

"I exercise twice each week" should also be correct.

[BenTopolsk]

What's wrong with "i exercise two times every week"?

[Elijah.Fung]

I exercise twice one week. 为啥不行呢

[Rumactree]

Do you mean “I exercise twice a week”?