I only jog, but last week I was speaking to a friend who's all buff and in the navy and is REALLY into weightlifting (like, he's studied all the scientific aspects of it, because he's like that), and he insists that I should be doing 15-20 minutes of high intensity weight training twice a week.
The thing is, I don't belong to a gym because I jog outside, so it seems kind of pointless to sign up for a gym for 40 minutes a week of working out. Then again, I guess once winter comes I'll need someplace to jog . . .
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