To engage in physical activity in English, we would say "to exercise" or "to do sports." The origins of these phrases come from the Latin words "exercitare," meaning "to keep in motion," and "sporta," meaning "to play."

Here are some example sentences:

I like to exercise every morning to start my day off right.

My favorite way to do sports is to play soccer with my friends.

Exercise is important for maintaining good physical and mental health.

In Chinese, we would say "进行体育活动" to express the idea of engaging in physical activity.