These exercises do double duty: they combine two moves into one, working more muscle groups at one time and helping you get into shape even faster. All you need are a pair of dumbbells and a sturdy chair or bench. | Health.com

These exercises do double duty: they combine two moves into one, working more muscle groups at one time and helping you get into shape even faster. All you need are a pair of dumbbells and a sturdy chair or bench. | Health.com

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