There are 101 wimpy excuses for not working out—and I know because I've used all of them. I'm tired. My favourite show is on TV. I'm hungry. I really should reorganise my kitchen cabinets. But when the weather is really nasty or you're super-busy, you have a valid reason for forgoing exercise, right? Wrong. Here are 7 simple at-home workouts, many of which can be done in less than 20 minutes.

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