12. Heart rate monitor
If you already own a heart rate monitor or fitness tracker, then this is a good time to start using it. If not, you may want to either go out and buy one, or learn how to do it yourself. “Don’t just exercise for a set amount of time and call it quits,” Duffy says. “You need to bring the intensity with it, and a fitness tracker can help you get a sense of exactly how hard your heart is working.”
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