Best Arm Exercises: Build Bigger Biceps and Triceps

Want bigger arms? It's not about doing endless curls. Building impressive arms requires training both the biceps AND triceps with the right exercises, proper form, and progressive overload.

This guide covers the most effective arm exercises, backed by EMG research and real-world results, plus complete workouts you can use today.

Arm Anatomy Basics

Understanding arm anatomy helps you train smarter.

Biceps

The biceps brachii has two heads:

• Long head — Outer part, creates the "peak"
• Short head — Inner part, creates thickness

Biceps function: Elbow flexion and supination (turning palm up)

Triceps

The triceps brachii has THREE heads (making up about 2/3 of arm size):

• Long head — Largest, crosses the shoulder joint
• Lateral head — Outer "horseshoe" shape
• Medial head — Deep, under the other heads

Triceps function: Elbow extension

Key insight: Your triceps are bigger than your biceps. If you want bigger arms, prioritize tricep training.

Best Bicep Exercises

1. Barbell Curl

The classic mass builder.

How to do it:

1. Stand with feet shoulder-width apart
2. Grip barbell slightly wider than hips, palms up
3. Keep elbows pinned to sides throughout
4. Curl weight up by bending elbows
5. Squeeze at top, lower with control

Tips:

• Don't swing or use momentum
• Keep wrists neutral (not bent back)
• Full range of motion — complete extension at bottom

Best for: Overall bicep mass

2. Incline Dumbbell Curl

Stretches the long head for peak development.

How to do it:

1. Set bench to 45-60 degrees
2. Let arms hang straight down, palms forward
3. Curl dumbbells up, keeping upper arms vertical
4. Squeeze at top, slow negative

Why it works: The incline position puts the long head in a stretched position, which research shows enhances muscle growth.

Best for: Bicep peak

3. Hammer Curl

Targets the brachialis (underneath biceps) for arm thickness.

How to do it:

1. Hold dumbbells with neutral grip (palms facing each other)
2. Keep elbows pinned
3. Curl weight up maintaining neutral grip
4. Control the descent

Why it matters: The brachialis, when developed, pushes the biceps up and adds arm width.

Best for: Arm thickness, brachialis, forearms

4. Preacher Curl

Isolates biceps with zero cheating.

How to do it:

1. Position upper arms flat on preacher pad
2. Start with arms nearly straight (slight bend)
3. Curl weight up, squeezing at top
4. Control the negative

Key tip: Don't fully straighten at bottom — keep slight bend to protect elbows.

Best for: Isolation, short head emphasis

5. Cable Curl

Constant tension throughout the movement.

How to do it:

1. Attach straight or EZ bar to low cable
2. Step back slightly for tension at bottom
3. Curl up, squeeze, slow negative

Why cables work: Unlike free weights, cables maintain tension at the top of the curl where dumbbells/barbells lose resistance.

Best for: Time under tension, finishing sets

Best Tricep Exercises

1. Close-Grip Bench Press

Heavy compound movement for overall tricep mass.

How to do it:

1. Lie on bench, grip shoulder-width or slightly narrower
2. Keep elbows at 45 degrees (not flared)
3. Lower bar to lower chest
4. Press up, focusing on tricep contraction

Tips:

• Don't go too narrow — shoulder width is fine
• Keep elbows tucked
• Use full range of motion

Best for: Overall tricep mass and strength

2. Dips

Bodyweight mass builder.

How to do it:

1. Grip parallel bars, arms straight
2. Lean forward slightly (more upright = more tricep focus)
3. Lower until shoulders are at or slightly below elbows
4. Press back up to lockout

Variations:

• Bodyweight dips for reps
• Weighted dips for strength
• Bench dips (easier regression)

Best for: Tricep and chest mass

3. Overhead Tricep Extension

Best exercise for the long head (largest portion).

How to do it:

1. Hold dumbbell or cable overhead, arms extended
2. Keep upper arms vertical throughout
3. Lower weight behind head by bending elbows
4. Extend back up to start

Why it works: The long head crosses the shoulder joint. Overhead position stretches it fully, leading to more growth stimulus.

Best for: Long head, overall tricep size

4. Tricep Pushdown

Cable isolation for lateral and medial heads.

How to do it:

1. Attach rope or straight bar to high cable
2. Stand with slight forward lean
3. Keep elbows pinned at sides
4. Extend arms fully, squeeze at bottom
5. Control the return

Grip variations:

• Rope — allows wrist rotation at bottom
• Straight bar — heavier weights
• V-bar — comfortable middle ground

Best for: Lateral head, "horseshoe" shape

5. Skull Crushers (Lying Tricep Extension)

Classic tricep builder.

How to do it:

1. Lie on bench, hold EZ bar or dumbbells overhead
2. Keep upper arms perpendicular to floor (or slightly angled back)
3. Lower weight toward forehead by bending elbows
4. Extend back up

Pro tip: Let your arms drift slightly back during the movement — this keeps tension on the triceps at the top and reduces elbow stress.

Best for: All three heads, mass building

6. Diamond Push-Ups

Effective bodyweight tricep exercise.

How to do it:

1. Place hands close together, forming diamond shape
2. Keep body in plank position
3. Lower chest toward hands
4. Press back up

Research note: EMG studies show diamond push-ups have higher tricep activation than many weighted exercises.

Best for: No equipment, tricep activation

Arm Training Principles

1. Train Triceps More

Triceps make up 2/3 of your arm. If arm size is the goal, prioritize them.

Volume recommendation:

• Triceps: 10-15 sets per week
• Biceps: 8-12 sets per week

2. Use Full Range of Motion

Partial curls = partial results. Use full extension and full contraction.

3. Include Different Positions

For biceps:

• Arms behind body (incline curls) — long head stretch
• Arms in front (preacher curls) — short head emphasis
• Neutral grip (hammer curls) — brachialis

For triceps:

• Overhead (extensions) — long head emphasis
• Arms at sides (pushdowns) — lateral/medial emphasis
• Both for complete development

4. Progressive Overload

Add weight, reps, or sets over time. Your arms won't grow doing the same 25-lb curls forever.

5. Control the Negative

Eccentric (lowering) phase is critical for muscle growth. 2-3 second negatives on every rep.

Sample Arm Workouts

Beginner Arm Workout (20 minutes)

1. Barbell Curl — 3x10
2. Hammer Curl — 2x12
3. Close-Grip Bench Press — 3x10
4. Tricep Pushdown — 2x15

Mass Building Arm Day (45 minutes)

Biceps:

1. Barbell Curl — 4x8-10
2. Incline Dumbbell Curl — 3x10-12
3. Preacher Curl — 3x12
4. Hammer Curl — 2x12-15

Triceps:

1. Close-Grip Bench Press — 4x8-10
2. Overhead Cable Extension — 3x10-12
3. Skull Crushers — 3x10-12
4. Rope Pushdown — 2x15

Quick Arm Finisher (10 minutes)

After push/pull day:

1. Superset — Barbell Curl + Tricep Pushdown: 3x12 each
2. Superset — Hammer Curl + Overhead Extension: 2x15 each

Arm Specialization (Train arms 2-3x per week)

Day 1 — Heavy:

• Barbell Curl: 4x6-8
• Close-Grip Bench: 4x6-8
• Hammer Curl: 3x8
• Dips: 3x8 (weighted)

Day 2 — Volume:

• Incline Dumbbell Curl: 4x12
• Overhead Tricep Extension: 4x12
• Cable Curl: 3x15
• Pushdown: 3x15

Common Arm Training Mistakes

1. Too Much Swinging

Using momentum takes tension off the biceps. Keep body still, elbows pinned.

2. Neglecting Triceps

Many lifters do 5 curl variations and one pushdown. Flip it — triceps need more work.

3. Going Too Heavy

Arms are small muscles. Ego lifting with terrible form won't build them. Use weights you can control for 8-15 reps.

4. Only One Grip

Different grips hit different parts. Mix up wide, narrow, supinated, neutral, and pronated grips.

5. Ignoring the Negative

Dropping the weight after curling wastes half the exercise. Control the descent.

Training Frequency

For most people:

• Include arm exercises 2x per week
• Either dedicated arm day OR add to push/pull days

For arm specialization:

• 3x per week direct arm work
• Reduce other training volume to compensate

Key Takeaways

1. Triceps are 2/3 of arm size — train them accordingly
2. Include exercises with arms behind, beside, and in front of body for complete bicep development
3. Overhead work is essential for the tricep long head
4. Control the negative on every rep
5. Use full range of motion — partial reps = partial results
6. Progressive overload — add weight over time

Build these exercises into your routine, train with intensity, eat enough protein, and your arms will grow. No fancy programs needed — just consistent work on the basics.