I've run for 20 minutes every morning___(keep) in good health.这里用 to keep还是keeping? 为什么?

I've run for 20 minutes every morning___(keep) in good health.这里用 to keep还是keeping? 为什么?
I've run for 20 minutes every morning___(keep) in good health.
这里用 to keep还是keeping? 为什么?

I've run for 20 minutes every morning___(keep) in good health.这里用 to keep还是keeping? 为什么?
to keep
因为 我每天早晨跑步的目的是为了保持健康,表目的用不定式to.

在这里用to keep更好,因为to+动词原形表目的,即"我锻炼是为了保持健康".

to keep
表示你的能愿，跑步要达到的目的就是保持健康。