According to Jim, it's important to incorporate both cardio and strength training if you want to lose weight and keep it off for good. And while you probably know this already, the way he explains it totally changed the way we thought about working out for long-term weight loss.
"The reason for needing both cardio and resistance training in your exercise routine is the way your body burns calories long-term," he told us. "Running is like a debit account (you would create a calorie deficit, but that deficit is a one-time transaction), whereas resistance training is like getting a payout from an investment account (the calories you burn during your exercise continue even after your workout ends)."
So while cardio burns calories as you do it, resistance training (such as lifting weights, bodyweight moves, or using resistance bands) helps build lean muscle in your body, which will burn more calories at rest. For weight loss, Jim recommends 300 minutes (five hours) of cardio a week and strength training at least two days a week.