Exercises for Underarm Fat: Tone Your Arms and Armpits

That stubborn pocket of fat near your armpits—sometimes called "armpit fat" or "bra overhang"—is a common frustration. Here's how to address it with targeted exercises.

What Causes Underarm Fat?

The underarm area involves multiple tissues:

1. Fat deposits (genetic distribution)
2. Breast tissue (can extend toward armpit)
3. Skin laxity (decreases with age)
4. Muscle tone (or lack thereof)

You can't spot-reduce, but you can build muscle in the surrounding areas to create a more toned appearance.

Muscles That Shape the Underarm Area

Pectoralis Major (chest)

• Upper portion connects near armpit
• Toned pecs create smoother chest-to-arm transition

Latissimus Dorsi (lats)

• Side of back, runs under armpit
• Definition here improves appearance

Serratus Anterior (side ribs)

• Runs under armpit along ribs
• Creates defined, athletic look

Triceps (back of arm)

• Back of upper arm
• Toned triceps improve overall arm appearance

Best Exercises for Underarm Fat

Chest Exercises

Push-Ups

• Standard or modified (knees)
• Focus on full range of motion
• 3 sets of 10-15 reps

Incline Dumbbell Press

• Bench at 30-45 degrees
• Press dumbbells up and together
• Targets upper chest near armpit
• 3 sets of 12 reps

Chest Flyes

• Lie flat or incline
• Arms out to sides, slight bend in elbows
• Bring dumbbells together over chest
• 3 sets of 12-15 reps

Cable Crossover (High to Low)

• Set cables high
• Pull down and across body
• Squeeze chest at bottom
• 3 sets of 12-15 reps

Back Exercises

Lat Pulldowns

• Wide grip, pull to upper chest
• Squeeze lats at bottom
• 3 sets of 12 reps

Straight-Arm Pulldowns

• Arms straight, pull down to thighs
• Feel lats engage
• 3 sets of 15 reps

Single-Arm Rows

• Pull toward hip
• Keep elbow close to body
• 3 sets of 10-12 each arm

Serratus Exercises

Scapular Push-Ups

• Push-up position, arms straight
• Let chest sink down, then push through shoulders
• Rounds upper back, engages serratus
• 3 sets of 15 reps

Serratus Punches

• Lie on back, arms straight up
• Punch ceiling, rounding shoulder blades off floor
• 3 sets of 15 reps

Wall Slides with Lift-Off

• Stand against wall, arms in goalpost
• Slide arms up, then lift off wall 1 inch
• 3 sets of 12 reps

Tricep Exercises

Tricep Dips

• Hands on chair or bench behind you
• Lower body by bending elbows
• Push back up
• 3 sets of 12-15 reps

Overhead Tricep Extension

• Hold weight overhead with both hands
• Lower behind head, elbows pointing up
• Extend back to start
• 3 sets of 12 reps

Tricep Pushdowns

• Cable or resistance band
• Keep elbows at sides, extend arms down
• Squeeze triceps at bottom
• 3 sets of 15 reps

Combination Exercises

These hit multiple underarm-area muscles:

Dumbbell Pullover

• Lie on bench, hold dumbbell overhead
• Lower behind head, then pull back over
• Works chest, lats, serratus
• 3 sets of 12 reps

Close-Grip Push-Ups

• Hands closer than shoulder-width
• Works chest and triceps intensely
• 3 sets of 10-12 reps

Renegade Rows

• Plank position with dumbbells
• Row one dumbbell up, stabilize with other
• Works back, core, and chest
• 3 sets of 8-10 each arm

The Complete Underarm Toning Workout

Do this 3 times per week:

Warm-Up (5 minutes)

• Arm circles: 30 seconds each direction
• Wall push-ups: 10 reps
• Band pull-aparts: 15 reps
• Cat-cow stretches: 10 reps

Main Workout

Block 1: Chest (3 rounds)

• Push-ups: 12 reps
• Incline dumbbell press: 12 reps
• Rest 30 seconds

Block 2: Back (3 rounds)

• Lat pulldowns: 12 reps
• Single-arm rows: 10 each arm
• Rest 30 seconds

Block 3: Arms (3 rounds)

• Tricep dips: 12 reps
• Tricep pushdowns: 15 reps
• Rest 30 seconds

Block 4: Serratus (2 rounds)

• Scapular push-ups: 15 reps
• Wall slides: 12 reps
• Dumbbell pullover: 12 reps
• Rest 30 seconds

Finisher

• Close-grip push-ups: As many as possible
• Plank hold: 30 seconds

Cool-Down

• Doorway chest stretch: 30 seconds each side
• Tricep stretch: 30 seconds each arm
• Child's pose with reach: 30 seconds each side

At-Home Version (No Equipment)

Circuit (repeat 3-4 times):

• Push-ups: 10-15 reps
• Tricep dips (using chair): 12 reps
• Scapular push-ups: 15 reps
• Close-grip push-ups: 8-10 reps
• Superman holds: 30 seconds
• Rest 1 minute between circuits

Add resistance bands for more challenge.

Cardio for Fat Loss

Building muscle helps, but you need cardio too:

Best Options:

• Rowing (engages entire upper body)
• Swimming (excellent for arms and back)
• Boxing (major arm involvement)
• Battle ropes (intense arm + cardio)

Aim For:

• 150 minutes moderate OR 75 minutes vigorous weekly
• Mix HIIT with steady-state

The Bra Factor

Ill-fitting bras make underarm fat more prominent:

Better Fit Tips:

• Get professionally sized
• Side boning can smooth area
• Avoid too-tight bands that push tissue out
• Consider styles with side coverage

Posture Impact

Rounded shoulders push tissue forward:

Improve By:

• Strengthening upper back
• Stretching chest daily
• Practicing shoulder-back posture
• Strengthening serratus (exercises above)

Realistic Timeline

Week 1-4: Building strength, no visible change Week 5-8: Muscles feeling firmer Week 8-12: Starting to see definition Month 3-4: Noticeable improvement Month 4-6: Significant transformation possible

Remember: muscle builds faster than fat is lost. You might feel firmer before you look leaner.

Common Mistakes

Ignoring nutrition

• Can't out-exercise poor diet
• Need slight calorie deficit for fat loss

Only doing arm exercises

• Full body training burns more calories
• Don't skip legs and core

Avoiding weights

• Light weights + high reps doesn't create tone
• Need challenging resistance

Expecting immediate results

• Real change takes 8+ weeks
• Stay consistent

Nutrition Reminders

For visible change:

• Slight calorie deficit (250-500 below maintenance)
• High protein (preserves muscle while losing fat)
• Patience (fat loss is gradual)

Weekly Schedule Example

Monday: Underarm toning workout + 15 min HIIT Tuesday: Lower body + core Wednesday: 30 min cardio (rowing or swimming) Thursday: Underarm toning workout + 15 min HIIT Friday: Full body strength Saturday: 30 min moderate cardio Sunday: Rest or yoga

The Bottom Line

To reduce underarm fat:

1. Build chest, back, and tricep muscles for toned appearance
2. Don't forget serratus for smooth, athletic underarm
3. Lose overall body fat through calorie deficit
4. Fix posture by strengthening upper back
5. Get properly fitted bras to minimize appearance

Consistent training targeting these muscles, combined with overall fat loss, will create visibly smoother, more toned underarms within 2-4 months. There's no spot-reduction shortcut, but the work pays off.