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10 Moves + 10 Reps Each = The Defined Arms You've Always Wanted

Ten moves. 10 reps each. Sounds simple enough, but man, your arms will be toast after completing 100 reps without a rest. Modify this workout to fit your ability level by using two- to 10-pound dumbbells. Use the same size dumbbell for all 10 exercises (I used eight-pounders), or switch between lighter and heavier weights depending on the move. If this is still too hard, do five reps for each move instead of 10.

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Source: POPSUGAR Fitness