Dumbbell Bicep Curl

Definition

The dumbbell bicep curl is a pull/isolation exercise that targets the biceps brachii. Standing upright with a dumbbell in each hand, the athlete flexes the elbows to curl the weights toward the shoulders, then lowers under control. While not a compound movement, the bicep curl strengthens the elbow flexors that assist in every pulling exercise HYROX^® athletes perform - from sled pulls to rowing.

Technique & Form

1. Starting position - Stand with feet shoulder-width apart, a dumbbell in each hand, arms fully extended with palms facing forward (supinated grip).
2. Curl phase - Flex the elbows to curl both dumbbells toward the shoulders. Keep the upper arms pinned to the sides of the torso.
3. Lowering phase - Lower the dumbbells under control to full extension. Do not let them drop.
4. Breathing - Exhale during the curl; inhale during the lowering.
5. Tempo - 1 second up, 2 seconds down for strength; 2-1-3-0 for hypertrophy.

Muscles Worked

• Primary movers: Biceps brachii (long and short heads), brachialis
• Stabilizers: Brachioradialis, anterior deltoid, core

Common Mistakes

• Swinging the torso - Using body momentum to cheat the weight up. Fix: brace the core and keep the torso completely still, or perform curls with your back against a wall.
• Incomplete range of motion - Cutting the rep short at the bottom. Fix: fully extend the elbows at the bottom of each rep.

Benefits

• Strengthens the elbow flexors that support grip during sled pulls and farmers carries.
• Builds bicep endurance for sustained pulling efforts like rowing.
• Prevents elbow tendon issues by strengthening the muscles around the joint.

HYROX^® Context

The bicep curl is an accessory exercise that supports the Sled Pull and Rowing stations. During sled pulls, the biceps assist the lats in maintaining arm flexion while the legs drive backward. During rowing, the biceps contribute to every stroke cycle. Strong biceps also reduce the risk of elbow tendinopathy that can develop from high-volume pulling. Program 2-3 sets of 10-15 reps at the end of pull-day sessions alongside exercises like the dumbbell row or dumbbell hammer curl.

Variations & Alternatives

• Dumbbell Hammer Curl - Neutral grip variation targeting the brachialis and forearm.
• Incline Dumbbell Curl - Performed on an incline bench for greater bicep stretch.
• Dumbbell Preacher Curl - Bench-supported for strict isolation.

FAQ

Are bicep curls necessary for HYROX^® training? Not essential, but beneficial. They strengthen the elbow flexors as an accessory to compound pulling movements and help prevent overuse injuries in athletes with high pulling volume.

Should I curl heavy or light for HYROX^®? Moderate weight for 10-15 reps. HYROX^® demands muscular endurance, not maximal bicep strength. Focus on controlled reps and full range of motion.

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