How Iridium Programs This

Iridium calculates the indirect accumulated volume your forearms have received from recent compound pulling movements to determine if direct work is strictly necessary to meet your Minimum Effective Volume. Since grip fatigue affects nearly all upper body training, Iridium schedules this isolation exercise strategically to ensure your forearms are fatigued only after your heavy compound lifts are complete. The AI monitors your RPE trends to adjust rep targets, focusing on high-metabolite work that drives hypertrophy without overloading your joints.

Form Cues

Rest your forearm completely flat on a bench or your thigh for stability.
Allow the dumbbell to roll down into your fingers at the bottom of the movement.
Curl the weight up as high as possible by flexing your wrist.
Squeeze the forearm muscles hard at the peak of the contraction.
Control the weight slowly as you lower it back to the starting position.

Don't

Don't lift your forearm off the bench to help move the weight.
Don't use your bicep to pull the weight up.
Don't swing the dumbbell or use momentum to initiate the curl.
Don't cut the range of motion short; fully extend the wrist at the bottom.

Common Mistakes

Lifting the forearm off the support
Using excessive momentum
Shortening the range of motion
Gripping the dumbbell too tightly preventing finger roll
Using a weight that is too heavy to control

Muscles Worked

This exercise primarily targets the wrist flexors (flexor carpi radialis and ulnaris) located on the underside of the forearm. These muscles are essential for stabilizing the wrist during heavy lifts and improving grip strength for exercises like deadlifts and rows.