Arm Workout: Build Bigger Biceps and Triceps

Everyone wants bigger arms. They're the most visible muscle group, the first thing people notice when you're in a t-shirt.

The good news: arms respond well to direct training. The key is understanding that triceps make up two-thirds of your arm size, hitting both muscle groups effectively, and being consistent.

This workout gives you everything you need.

Arm Anatomy: What You're Training

Biceps

Located on the front of your upper arm. Two heads:

• Long head: Outer part of bicep, creates the "peak"
• Short head: Inner part, creates width

Functions: Elbow flexion (curling), forearm supination (rotating palm up)

Triceps

Located on the back of your upper arm. Three heads:

• Long head: Inner part, largest head
• Lateral head: Outer part, creates "horseshoe" shape
• Medial head: Deep head, underneath the other two

Functions: Elbow extension (straightening arm)

Important: Triceps are 2/3 of your arm size. If you want big arms, prioritize triceps.

Forearms

Often neglected, but contribute to arm aesthetics and grip strength.

The Complete Arm Workout

Perform as a dedicated arm day, or add to the end of other workouts.

Warm-Up (3 minutes)

• Arm circles: 30 seconds each direction
• Wrist circles: 30 seconds each direction
• Light bicep curls: 15 reps
• Light tricep pushdowns: 15 reps

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Tricep Exercises

Exercise 1: Close-Grip Bench Press Targets: All three tricep heads

3 sets × 8-10 reps | Rest: 90 seconds

How to do it:

1. Lie on bench, grip bar with hands shoulder-width apart
2. Lower bar to lower chest, keeping elbows close to body
3. Press up by extending elbows
4. Feel triceps working, not just chest

Key point: Don't go too narrow—shoulder-width grip protects wrists.

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Exercise 2: Tricep Pushdown Targets: Lateral and medial heads

3 sets × 10-12 reps | Rest: 60 seconds

How to do it:

1. Stand at cable machine, bar or rope at chest height
2. Pin elbows to sides—they don't move
3. Push handle down until arms are fully extended
4. Squeeze triceps at bottom
5. Return with control, stopping when forearms are parallel

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Exercise 3: Overhead Tricep Extension Targets: Long head (fully stretched overhead)

3 sets × 10-12 reps | Rest: 60 seconds

How to do it:

1. Hold dumbbell with both hands overhead
2. Lower weight behind head by bending elbows
3. Keep upper arms stationary, pointing up
4. Extend back to starting position

Cable variation: Face away from cable, rope behind head, extend overhead.

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Exercise 4: Tricep Dips (or Bench Dips) Targets: All three heads with body weight

2 sets × 10-15 reps | Rest: 60 seconds

Parallel bar dips:

1. Grip bars, arms extended, body upright
2. Lower by bending elbows until upper arms are parallel to floor
3. Keep body vertical (leaning forward shifts to chest)
4. Press back up

Bench dips (easier):

1. Hands on bench behind you, feet on floor
2. Lower body by bending elbows
3. Press back up

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Bicep Exercises

Exercise 5: Barbell Curl Targets: Both bicep heads

3 sets × 8-10 reps | Rest: 60 seconds

How to do it:

1. Stand with barbell, shoulder-width grip, palms forward
2. Keep elbows pinned at sides
3. Curl bar toward shoulders without swinging
4. Lower with control—don't drop the weight
5. Full extension at bottom (don't stop short)

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Exercise 6: Incline Dumbbell Curl Targets: Long head (stretched at bottom)

3 sets × 10-12 reps | Rest: 60 seconds

How to do it:

1. Sit on incline bench (45-degree angle)
2. Let arms hang straight down, dumbbells at sides
3. Curl weights up without moving upper arms
4. Lower with control, feeling the stretch at bottom

Why this matters: The incline stretches the long head, hitting it harder.

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Exercise 7: Hammer Curl Targets: Brachialis (under bicep) and forearms

3 sets × 10-12 reps | Rest: 60 seconds

How to do it:

1. Stand with dumbbells at sides, palms facing body (neutral grip)
2. Curl weights up keeping palms facing each other
3. Don't rotate—maintain neutral grip throughout
4. Lower with control

Why this matters: Hammer curls build the brachialis, which pushes the bicep up for more overall arm size.

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Exercise 8: Concentration Curl Targets: Bicep peak, isolation

2 sets × 12-15 reps each arm | Rest: 45 seconds

How to do it:

1. Sit on bench, elbow braced against inner thigh
2. Curl dumbbell toward shoulder
3. Squeeze at top, emphasizing the peak contraction
4. Lower with control
5. Complete all reps, switch arms

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Workout Summary

| Exercise | Sets | Reps | Target | |----------|------|------|--------| | Close-Grip Bench | 3 | 8-10 | Triceps | | Tricep Pushdown | 3 | 10-12 | Triceps | | Overhead Extension | 3 | 10-12 | Long Head | | Dips | 2 | 10-15 | Triceps | | Barbell Curl | 3 | 8-10 | Biceps | | Incline Curl | 3 | 10-12 | Long Head | | Hammer Curl | 3 | 10-12 | Brachialis | | Concentration Curl | 2 | 12-15 | Peak |

Total time: 35-45 minutes

Training Tips for Bigger Arms

Control the Weight

Arms respond to tension, not momentum. Slow, controlled reps beat fast, swinging reps every time.

Tempo suggestion: 2 seconds up, 2 seconds down minimum.

Full Range of Motion

Partial reps build partial muscles. Full extension at the bottom, full contraction at the top.

Squeeze at the Top

Pause for 1 second at peak contraction. This maximizes muscle fiber recruitment.

Don't Neglect the Stretch

Exercises that stretch the muscle (incline curls, overhead extensions) create unique stimulus for growth.

Train Arms Twice Per Week

Arms recover quickly. Training them twice per week (with 2-3 days between) maximizes growth.

Prioritize Triceps

Remember: triceps are 2/3 of arm size. More tricep work = bigger arms.

Common Mistakes

Swinging and cheating: Using momentum steals work from your arms. If you need to swing, the weight is too heavy.

Elbows drifting: Keep elbows stationary on curls and extensions. Moving elbows brings other muscles in.

Partial reps: Going halfway down on curls or not fully extending on pushdowns limits growth.

All biceps, no triceps: Training biceps three times as much as triceps is backwards. Balance or prioritize triceps.

Same exercises always: Vary exercises to hit muscles from different angles and prevent plateaus.

Ignoring compound movements: Rows, pull-ups, and presses build arm size too. Don't only do isolation work.

Arm Training Frequency

Beginners: Arms get enough work from compound movements. Add 2-4 sets of curls and pushdowns at end of workouts.

Intermediate: Dedicated arm work twice per week, 8-12 sets per muscle.

Advanced: Higher frequency and volume may be needed. Some train arms 3x/week with lower volume each session.

Progressions

Arms don't need heavy weight to grow. Progress through:

1. More reps: 10 → 12 → 15 reps before adding weight
2. Better form: Stricter control, longer negatives
3. More sets: Add volume gradually
4. More weight: Small increments (2.5-5 lbs) when form is perfect

Sample Weekly Split

Option 1: Push/Pull/Legs

• Add triceps to push day
• Add biceps to pull day

Option 2: Upper/Lower

• Include arm work on both upper days
• Reduce per-session volume since frequency is higher

Option 3: Dedicated Arm Day

• Full arm workout as its own session
• Best for prioritizing arm growth

The Bottom Line

Building bigger arms requires:

• Balance: Triceps are 2/3 of arm size—train them accordingly
• Variety: Hit all heads of both muscles
• Control: Quality reps beat sloppy heavy sets
• Consistency: Train arms 2x/week for best results
• Patience: Arms grow slowly. Stay consistent for months, not weeks.

This workout covers all the bases. Do it consistently, progress over time, and watch your arms grow.