Exercise guide · Beginner · Compound

Dumbbell One Arm Seated Hammer Curl: How to Do It & Muscles Worked

The dumbbell one arm seated hammer curl is an isolation exercise targeting the biceps and forearms. It is performed seated, with the elbow braced against the thigh, using a neutral grip to emphasize the brachialis and brachioradialis muscles.

Primary muscles
Biceps
Secondary muscles
Forearms
Equipment
Dumbbell
Level · type
Beginner · Compound
Demonstration of the dumbbell one arm seated hammer curl
Front view: muscles worked by the dumbbell one arm seated hammer curl. Primary: biceps. Secondary: forearms.
Back view: muscles worked by the dumbbell one arm seated hammer curl. Primary: biceps. Secondary: forearms.
Primary Secondary

How to do the dumbbell one arm seated hammer curl

  1. Step 1: Sit on a bench with your back straight and feet flat on the ground.
  2. Step 2: Hold a dumbbell in one hand with a neutral grip (palms facing each other).
  3. Step 3: Rest your elbow on the inside of your thigh, just above the knee.
  4. Step 4: Keeping your upper arm stationary, exhale and curl the dumbbell up towards your shoulder.
  5. Step 5: Pause for a moment at the top, squeezing your biceps.
  6. Step 6: Inhale and slowly lower the dumbbell back to the starting position.
  7. Step 7: Repeat for the desired number of repetitions, then switch arms.

Sets, reps and programming

Suggested sets, reps and rest for the dumbbell one arm seated hammer curl by training goal
Goal Sets Reps Rest Effort
Strength 3–5 3–6 3–5 min 1–3 reps in reserve
Muscle growth 3–4 6–12 2–3 min 1–2 reps in reserve
Muscular endurance 2–3 12–20 1–2 min 1–3 reps in reserve

Ranges follow the ACSM position stand on progression in resistance training. Muscle grows across a wide range of loads when sets end close to failure (Schoenfeld et al., 2017), longer rests between heavy sets support strength and size (Schoenfeld et al., 2016), and stopping a rep or two short of failure works about as well as training to failure (Grgic et al., 2022). Estimate your working weights with the strength calculators.

Dumbbell One Arm Seated Hammer Curl alternatives

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Sources

  1. American College of Sports Medicine. Progression models in resistance training for healthy adults. Med Sci Sports Exerc. 2009;41(3):687-708.
  2. Schoenfeld BJ, Grgic J, Ogborn D, Krieger JW. Strength and hypertrophy adaptations between low- vs. high-load resistance training. J Strength Cond Res. 2017;31(12):3508-3523.
  3. Schoenfeld BJ, Pope ZK, Benik FM, et al. Longer interset rest periods enhance muscle strength and hypertrophy in resistance-trained men. J Strength Cond Res. 2016;30(7):1805-1812.
  4. Grgic J, Schoenfeld BJ, Orazem J, Sabol F. Effects of resistance training performed to repetition failure or non-failure on muscular strength and hypertrophy: a systematic review and meta-analysis. J Sport Health Sci. 2022;11(2):202-211.

Step-by-step instructions and demonstration media are from the ExerciseDB exercise dataset.

This guide is general fitness information, not medical advice. Stop if an exercise causes pain and speak to a doctor or physiotherapist about injuries or health conditions before starting a new programme.