Bayesian Curl
- Intermediate
- Cable
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.
How to do the Bayesian Curl
- Set a single handle on the lowest pulley and select a light weight.
- Face away from the stack and take the handle with your palm forward.
- Step forward until the cable is taut and your working elbow sits behind your ribs.
- Brace your abs and lean slightly forward in a split stance.
- Bend the elbow to curl the handle toward your shoulder without letting the elbow move forward.
- Lower under control back into the stretch, finish the set, then swap arms.
Muscles worked
- Primary:
- Biceps
- Secondary:
- Forearms
Why train it
- 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.
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.
Frequently asked questions
What muscles does the Bayesian Curl work?
The Bayesian Curl trains the biceps as the main target. Expect the forearms to take some of the load as well.
What equipment do I need for the Bayesian Curl?
The Bayesian Curl needs a cable machine. Nothing beyond that is required to run the movement the way it is described above.
Is the Bayesian Curl suitable for beginners?
With some training behind you. The Bayesian Curl is rated intermediate, which means the setup matters as much as the effort. It is a reasonable first month goal rather than a first session one, and the alternatives below are the easier way in.
Can I do the Bayesian Curl at home?
Only if your home setup runs to a cable machine. Most do not, so this is usually a gym movement. The alternatives below cover the same muscles with kit you are more likely to have.
How many sets and reps of the Bayesian Curl should I do?
Three to four sets of 10 to 15 reps. Isolation work responds to reps and a controlled tempo rather than load, so stop each set a rep or two short of failure and keep the weight honest.
What are good alternatives to the Bayesian Curl?
Barbell Curl, Zottman Curl, and Kettlebell Curl train the same primary muscles as the Bayesian Curl. Pick whichever one matches the equipment in front of you.