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.
Get Strong, Defined Arms With This 100-Rep Arm Workout
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