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Is it harder to perform an exercise with two heavy dumbbells using both arms than using one arm to lift one heavy dumbbell? Am I able to get more out of it
The One-Dumbbell Workout
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The Ultimate One-Dumbbell Workout
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Is it harder to perform an exercise with two heavy dumbbells using both arms than using one arm to lift one heavy dumbbell? Am I able to get more out of it