Single Hand Biceps Curl
The single-hand biceps curl trains one arm at a time with a dumbbell, finishing all reps on one side before switching. Removing the second dumbbell sharpens focus, exposes left-right strength gaps, and stops the stronger arm setting a pace the weaker one cannot honestly match. Coached by Maddy (NASM-CPT) — these are the exact form cues he gives on every client's first week.
Muscles worked
Sets & reps by goal
| Goal | Sets × Reps | Rest |
|---|---|---|
| Strength | 4 × 3–6 per arm | 2–3 min |
| Muscle | 3–4 × 9–12 per arm | 60–90 s |
| Endurance | 3 × 18–27 per arm | 45–60 s |
Rep ranges per Helms 2014 · Schoenfeld 2016.
Level — Beginner
Beginner exercise — the single-arm format is a focus tool, not an added skill demand.
Proper form — 5 cues
- Stand tall, dumbbell in one hand, palm facing forward
- Pin the working elbow against your ribs
- Curl the dumbbell to shoulder height without the elbow drifting forward
- Squeeze the biceps hard at the top for one second
- Lower on a three-count until the arm is fully straight
Breathing: Exhale curling up, inhale on the slow three-count down.
The 3 mistakes Maddy corrects most
How to program single hand biceps curl
| Goal | Sets | Reps | Tempo | Rest | RPE |
|---|---|---|---|---|---|
| Strength — entry | 3 | 5-6 per arm | 2-0-1-0 | 2 min | 7 |
| Strength — standard | 4 | 3-6 per arm | 2-0-X-0 | 2-3 min | 8 |
| Strength — advanced | 4 | 3-5 per arm, heavy, strict | 3-0-X-0 | 2-3 min | 8-9 |
| Hypertrophy — entry | 3 | 9-10 per arm | 2-0-1-0 | 60-90 s | 7 |
| Hypertrophy — standard | 3-4 | 9-12 per arm | 2-0-1-1 | 60-90 s | 8 |
| Hypertrophy — advanced | 4 | 12 per arm, 3 s lowering | 3-0-1-1 | 90 s | 8-9 |
| Endurance — entry | 3 | 14-18 per arm | smooth, continuous | 60 s | 6-7 |
| Endurance — standard | 3 | 18-27 per arm | smooth, continuous | 45-60 s | 7-8 |
| Endurance — advanced | 3 | 27 per arm, minimal rest between arms | steady rhythm | 45 s | 8 |
| Beginner on-ramp — week 1-2 | 2 | 8-10 per arm, light dumbbell | 2-0-2-0 | 90 s | 5 |
| Beginner on-ramp — week 3-4 | 3 | 8-10 per arm | 2-0-1-0 | 60-90 s | 6 |
| Deload / technique | 2 | 8 per arm, light | 3-0-1-0 | 90 s | 5 |
Common questions
Is curling one arm at a time better than both together?
It has real advantages: total concentration on one biceps, no chance of the stronger arm masking the weaker, and slightly more available strength per arm because the nervous system focuses on a single limb. The cost is time — sets take twice as long — so many lifters rotate between both styles.
One arm is clearly stronger — how do I fix the imbalance?
Start every exercise with the weaker arm, let its clean rep count set the target, and give the stronger arm exactly that number — nothing more. Add an optional extra set for the weak side twice a week. Most visible gaps close over a couple of months of this simple discipline.
What weight should I start single-arm curls with?
Choose a dumbbell you can curl ten to twelve times with the elbow pinned and torso still — commonly 4 to 8 kg for beginners, more with training history. If the last reps need a lean or a swing, the weight is ahead of your biceps; drop down and own the movement first.
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