Multiple muscle group movements, or compound exercises, are exercises that incorporate multiple muscle groups at the same time.
"Exercises that incorporate multiple muscle groups at the same time not only burn more calories because they require more effort and energy to perform, but because they work different muscles at the same time, they kill two birds with one stone: you don't have to be in the gym as long," she said. For example, this lawnmower move (pictured) works your legs, arms, and abs.
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