How to do the Alternating Seated Dumbbell Curl
- Sit on a bench, holding a dumbbell in each hand, palms facing forward.
- Curl one dumbbell up toward your shoulder, keeping your elbow still.
- Slowly lower the weight to full elbow extension, then repeat on the other side.
Full technique — 7 steps
- Sit upright on the end of a flat bench with feet flat on the floor and a dumbbell in each hand.
- Let your arms hang at your sides with palms facing forward and elbows close to your torso.
- Curl one dumbbell toward the same-side shoulder without letting the elbow drift forward.
- Raise until the forearm is nearly vertical and the biceps fully shorten.
- Lower that dumbbell back to full elbow extension without swinging your torso.
- Curl the opposite dumbbell the same way while the first arm stays at your side.
- Continue alternating sides, keeping each rep smooth and matching the range on both arms.
Common mistakes
- Leaning back to start reps
- Letting the elbow drift forward
- Turning it into a hammer curl
- Cutting off the bottom range
- Swinging the torso to start reps
Form cues
- Keep upper arm still
- Palm stays up
- Sit tall on bench
- Match both sides
- Reach full elbow extension
Compared with similar variants
| Alternating Seated Dumbbell Curl | Hammer Curl | Alternating Dumbbell Curl | Barbell Curl | |
|---|---|---|---|---|
| Level | Beginner | Beginner | Beginner | Beginner |
| Technique to learn | easy | easy | easy | easy |
| How tiring | low | low | low | low |
| Elbow | low | low | low | moderate |
| Wrist | low | low | low | low |
| Equipment | Dumbbells, Flat bench | Dumbbells | Dumbbells | Barbell |
An estimate from our exercise ratings, not medical advice. How we rate exercises
Substitutes by equipment
Same muscles, same movement — pick the version you have the gear for.
Resistance bands
- Squatting Resistance Band Curl Same level
- Incline Resistance Band Curl Same level
Barbell
- Seated Barbell Curl Same level
- Single Arm Barbell Curl Harder
Kettlebell
- Kettlebell Goblet Curl Same level
- Single Arm Kettlebell Curl Same level
Cable machine
- Single-Arm Cable Cross-Body Curl Harder
- Single Arm Cable Curl Same level
Where to start and where to go next
Same muscles, same movement. Too hard for now — step down; once it gets easy — step up.
- Easier Alternating Machine Biceps Curl
- This exercise Alternating Seated Dumbbell Curl
- Harder Seated Zottman Curl
- Harder Single Arm Dumbbell Zottman Preacher Curl
Too hard for now? Start with the Alternating Machine Biceps Curl.
Quick answers
What muscles does the Alternating Seated Dumbbell Curl work?
Primary: Biceps 10/10. Also works: Forearms 5/10, Front delts 2/10.
Which joints does the Alternating Seated Dumbbell Curl load?
Elbow: low, Wrist: low.
When should I do the Alternating Seated Dumbbell Curl in a workout?
Finisher. Goes last, once the heavy work is done. ≈ 6 min with rest.
How many sets and reps of the Alternating Seated Dumbbell Curl?
Strength: 3–4 sets of 6–8 reps, rest 1 min 45 s, 2 reps in reserve. Muscle growth: 3–4 sets of 8–12 reps, rest 1 min 15 s, 2–3 reps in reserve. Endurance: 2–3 sets of 15–20 reps, rest 45 s, 3–4 reps in reserve.
What can I do instead of the Alternating Seated Dumbbell Curl?
Resistance bands: Squatting Resistance Band Curl, Incline Resistance Band Curl. Barbell: Seated Barbell Curl, Single Arm Barbell Curl. Kettlebell: Kettlebell Goblet Curl, Single Arm Kettlebell Curl. Cable machine: Single-Arm Cable Cross-Body Curl, Single Arm Cable Curl.
What is an easier version of the Alternating Seated Dumbbell Curl?
Alternating Machine Biceps Curl (Beginner).
What is a harder version of the Alternating Seated Dumbbell Curl?
Seated Zottman Curl (Beginner), Single Arm Dumbbell Zottman Preacher Curl (Intermediate).
