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  5. Arms
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  7. Lever Bicep Curl

Exercise guide

Lever Bicep Curl

  • Intermediate
  • Isolation
  • Rep-based
  • Upper arms

The Lever Bicep Curl provides constant tension throughout the entire range of motion, specifically targeting the biceps brachii. The fixed path of the leverage machine ensures stability and minimizes momentum, making it an excellent tool for muscle isolation.

Reviewed by the Crucible Fit team · Updated June 2026

Watch the Lever Bicep Curl demonstrationVideo and instructions for every movement are in the Crucible Fit app.

Muscles worked

Primary

  • Biceps

Secondary

  • Forearms

Equipment

  • Leverage machine

Setup

  1. Adjust the seat height so that your elbows align perfectly with the machine's pivot point.
  2. Sit firmly with your chest against the pad and your feet flat on the floor for stability.
  3. Grasp the handles with an underhand (supinated) grip, keeping your hands shoulder-width apart.
  4. Position the back of your upper arms flat against the arm pad, ensuring no gap between your armpits and the pad.

How to do it

  1. Exhale as you curl the handles toward your shoulders in a smooth, controlled arc while keeping your elbows pinned.
  2. Squeeze your biceps forcefully at the top of the movement for a one-second peak contraction.
  3. Inhale as you slowly lower the weight back to the starting position using a 3-second eccentric tempo.
  4. Stop the descent just before your elbows fully lock out to maintain constant tension on the biceps.

Form checklist

  • Keep your elbows and upper arms glued to the pad throughout the entire set.
  • Maintain a neutral spine and avoid leaning back or using your torso to swing the weight.
  • Ensure the machine's pivot point stays aligned with your elbow joint to prevent joint strain.
  • Keep your wrists straight or slightly flexed; do not let them extension backward under the load.

Pro tips

  • Focus on driving your pinky fingers toward your shoulders at the top of the rep to maximize bicep supination and peak contraction.
  • Maintain a light grip on the handles to reduce forearm involvement and force the biceps to do the heavy lifting.

Make it harder

  • Perform the exercise unilaterally (one arm at a time) to eliminate strength imbalances and increase core stabilization.
  • Incorporate 'iso-holds' by pausing for 2-3 seconds at the midpoint (90-degree angle) of the movement on every rep.

Frequently asked

What muscles does the lever bicep curl work?
The lever bicep curl primarily targets the biceps, and also works the forearms as secondary muscles.
What equipment do you need for the lever bicep curl?
The lever bicep curl uses leverage machine.
Is the lever bicep curl good for beginners?
The lever bicep 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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