New Science Shows How Exercise Affects Nearly Every Cell in the Body

Many Americans start off each new year with resolutions to lose weight, and gym memberships typically rise in January. But by March, the resolutions often have been dropped. The pounds didn’t melt away as expected, and the gym shoes get kicked to the back of the closet.

While exercising may help people lose weight and maintain the weight loss, fitness experts say, people might overestimate how many calories they burn when they are working out, or they simply may not do enough to move the scale. That 30-minute cardio workout that left you sweaty and breathless may have felt like a grueling marathon, but it may have burned only 200 to 300 calories.

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