Cable Straight Bar Biceps Curl
The cable straight bar biceps curl is a standing curl with a straight bar attached to the low pulley, supinated grip and elbows pinned at the sides, which keeps the biceps under tension through the whole range.
BICEPS · PULL
How it is executed
- Attach a short straight bar to a low pulley.
- Stand upright with feet shoulder-width apart and grip the bar with a supinated grip (palms up) at shoulder width.
- Keep your elbows pinned to your sides and curl the bar up toward your shoulders, squeezing the biceps at the top.
- Lower slowly under control without leaning back or using momentum.
Common mistakes
- Standing right up against the pulley. With the cable vertical, the biceps gets no load with the arm straight, which is exactly where the cable should beat the free barbell. Step back until the cable pulls slightly forward with the elbows extended.
- Leaning back to get the bar moving. The lower back and shoulders do the first part of the rep and the biceps only finishes it. Keep the knees slightly bent and the torso still; if you need to sway, drop a plate.
- Letting the elbows drift forward on the way up. When the elbow travels forward, the shoulder takes part of the work and the biceps loses tension at the top. Pin the elbows to the sides of the torso for the whole rep.
- Letting the wrist bend backward. With a straight bar the cable tends to extend the wrist, which loads the forearm and bothers the joint. Keep the wrist straight, knuckles up, and switch to an EZ bar if the straight one bothers you.
Frequently asked questions
- Which muscles does the cable straight bar curl work?
- The main muscle is the biceps brachii, both heads, which bends the elbow and holds the hand in supination. Underneath it the brachialis works, flexing the elbow with any grip, and the brachioradialis assists from the forearm. The wrist flexors hold the straight bar. The front delt keeps the upper arm in place isometrically, and the abs anchor the torso against the pull of the cable.
- Cable bar curl or free barbell curl: which one should you pick?
- The cable keeps tension through the whole rep: with a free barbell the load almost disappears at the top, when the forearm is vertical, while the cable keeps pulling. If you also step back, the biceps works in the stretched position too. The free barbell lets you move more weight and progress strength with heavy loads. To build volume under constant tension and as a finisher, use the cable; for heavy sets of 6 to 8, use the barbell.
- How many sets and reps of cable bar curls should you do?
- A common starting point is 3 sets of 10 to 15 reps, finishing with 1 or 2 reps in reserve and a two-second lowering. Because the tension never disappears at any point, the biceps tires sooner than with a free barbell, so the load is lighter than it looks. It goes at the end of a back or arm session, after the heavy pulls, and you progress one plate at a time.
- Is a straight bar or an EZ bar better for cable curls?
- The straight bar forces full supination, the position where the biceps works hardest, so it is the default choice if the wrists tolerate it. The EZ bar sets the hands at an in-between angle, easier on the wrists and elbows, and shares some of the work with the brachialis and brachioradialis. If the wrists complain or you want to use more load, switch to the EZ bar; the biceps remains the main muscle.
Sources and editorial approach
The explanation, variations and FAQs are Kaizer’s editorial synthesis. ACSM’s 2026 guidance provides general context on progression and resistance training in healthy adults; it does not independently validate the technique of each variation.
No individual professional review is recorded for this page.
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