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  5. Shoulders
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  7. Dumbbell Alternate Hammer Strict Curl

Exercise guide

Dumbbell Alternate Hammer Strict Curl

  • Intermediate
  • Isolation
  • Rep-based
  • Shoulders
  • Upper arms

This variation targets the brachialis and brachioradialis while using a wall to eliminate momentum, ensuring maximum tension on the elbow flexors. It is highly effective for building forearm thickness and bicep peak by isolating the muscles through a strict range of motion.

Reviewed by the Crucible Fit team · Updated June 2026

Watch the Dumbbell Alternate Hammer Strict Curl demonstrationVideo and instructions for every movement are in the Crucible Fit app.

Muscles worked

Primary

  • Biceps

Secondary

  • Forearms

Equipment

  • Dumbbell

Setup

  1. Stand with your upper back, glutes, and head pressed firmly against a flat wall.
  2. Hold a dumbbell in each hand with a neutral grip, palms facing your torso.
  3. Position your feet 6-12 inches away from the wall to maintain balance while keeping your torso vertically flush against the surface.
  4. Let your arms hang fully extended at your sides with elbows tucked in.

How to do it

  1. Exhale and curl one dumbbell toward your shoulder while keeping the palm facing inward and the elbow pinned against the wall.
  2. Squeeze the bicep and forearm at the peak of the contraction for one second.
  3. Inhale and slowly lower the weight back to the starting position using a controlled 3-second tempo.
  4. Perform the same movement with the opposite arm, alternating sides until the set is complete.

Form checklist

  • Keep your shoulders, back, and glutes in contact with the wall at all times.
  • Ensure the elbow does not drift forward; it should remain 'pinned' to your side.
  • Maintain a neutral wrist throughout the movement; do not let the weight pull your wrist into extension.
  • Avoid using your legs or hips to 'kick' the weight up.

Pro tips

  • Focus on the 'mind-muscle connection' by visualizing the muscle on the outside of your arm doing the work.
  • Squeeze the dumbbell handle as hard as possible to increase neural drive and forearm activation.
  • Keep your non-working arm fully locked out and tensed to help maintain total body stability.

Make it harder

  • Add a 2-second isometric hold at the 90-degree mark during the lowering phase.
  • Perform all reps on one side before switching to the other to increase the time under tension for each limb.

Frequently asked

What muscles does the dumbbell alternate hammer strict curl work?
The dumbbell alternate hammer strict curl primarily targets the biceps, and also works the forearms as secondary muscles.
What equipment do you need for the dumbbell alternate hammer strict curl?
The dumbbell alternate hammer strict curl uses dumbbell.
Is the dumbbell alternate hammer strict curl good for beginners?
The dumbbell alternate hammer strict curl is rated intermediate. Build a base with simpler variations first, then progress to it with light load and strict form.

Related exercises

  • Arm Double CrossoverIntermediate · biceps, deltoids, and triceps
  • Arms Stretch On A SupportBeginner · biceps, deltoids, and pectorals
  • Band 45 Degrees Biceps CurlBeginner · biceps
  • Band 45 Degrees One Arm Biceps CurlBeginner · biceps

Train it with Crucible Fit.

Every movement in this library is in the app with video and instructions, ready for your own sessions on the days between Crucibles. Your first Crucible is on us.

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