Below are the 3 best arm exercises to shape underarm fat :
1. WALL PUSHUPS
Stand six inches away from a flat wall. Lift your arms up to shoulder level and place your palms against the wall so that they are slightly wider than shoulder-width apart. Inhale, bend elbows to chest towards the wall. Exhale, straighten arms and return to starting position for one rep. Perform 8 to 9 repetitions.
2. HALF CIRCLE ROTATIONS
Arm circles targets biceps, triceps and shoulder muscles. Stand shoulder width apart. keep the arms out to the side with palms facing the ground. Rotate the arms in half circles forward until your thumb points towards the floor. Rotate back to your original position, keeping your elbows locked. Repeat this motion 20 times as quickly as possible.
3. TRICEP DIPS
Sit on the mat with your knees bent to 90 degrees, feet out in front and hands face down behind you. Keeping your elbows pointing behind you, slowly raise your shoulders until your arms are almost straight. Now, slowly lower your body back down toward the mat, just barely touching the ground. Perform 8 to 9 repetitions.