Bayesian Curl

What you'll gain

• Holds the biceps under load at a long muscle length where free weight curls go slack.

• Constant cable tension across the whole range, including the bottom of the rep.

• Unilateral loading exposes and evens out side to side differences.

Step-by-Step Instructions

1. 1

   Set a single handle on the lowest pulley and select a light weight.

2. 2

   Face away from the stack and take the handle with your palm forward.

3. 3

   Step forward until the cable is taut and your working elbow sits behind your ribs.

4. 4

   Brace your abs and lean slightly forward in a split stance.

5. 5

   Bend the elbow to curl the handle toward your shoulder without letting the elbow move forward.

6. 6

   Lower under control back into the stretch, finish the set, then swap arms.

Common Mistakes

• Not stepping far enough from the stack, so the arm never gets behind the body and the stretch is lost.

• Letting the elbow drift forward, which turns the lift into an ordinary cable curl.

• Loading too heavy, so the shoulder and torso swing the handle up instead of the biceps.

• Standing square to the cable, which drags the wire across the wrist and cuts the range short.

About This Exercise

The Bayesian curl turns your back to a low pulley and keeps the working elbow just behind your ribs for the whole set. With the shoulder in extension the biceps sits at a long muscle length while the cable pulls from behind, so tension never disappears at the bottom the way it does with a dumbbell. You step forward, lean slightly, and bend the elbow without letting it travel forward. A ten week trial that trained one arm this way and the other with preacher curls found similar biceps and brachialis growth, so treat it as a stretch biased option rather than a superior one. As an asset this covers the lengthened position cable curl most libraries lack. It suits arm specialization blocks, cable-only program tracks, and educational content comparing shoulder position across curl variations.

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