Ways to add exercise in a busy schedule?

i work two jobs and I don't have time to go to the gym or sign up for a sport. do you know any tips or advice that could help me?

what works for you?
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I'm not fat or want to lose weight, I just want to tone up and break a sweat. but there seems not to be much time to devote to that. any ideas?
Ways to add exercise in a busy schedule?
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