Should I alternate arms or complete all reps on one side first?

Complete all reps on one arm before switching to maintain consistent tension and focus on each side. Alternating arms can lead to longer rest periods that reduce the metabolic stress stimulus.

What cable attachment works best for single arm curls?

A single D-handle is the standard choice as it allows natural wrist rotation and a secure grip. Rope attachments can also work but may feel less stable for strict curling.

How does cable single arm curl compare to dumbbell curls?

Cable curls provide constant tension throughout the entire range of motion, including at the top and bottom positions where dumbbells offer less resistance. This makes cables particularly effective for maintaining continuous muscle tension during the set.

Single Arm Curl (Cable)

The single arm curl on cable is a unilateral biceps exercise performed by curling a low cable attachment with one hand at a time. It suits lifters who want constant tension throughout the range of motion and the ability to address strength imbalances between arms.

Muscle group: Biceps
Primary muscles: biceps
Equipment: Cable

How to do the Single Arm Curl (Cable)

Attach a single handle to a low cable pulley and stand facing the machine with feet shoulder-width apart.
Grasp the handle with one hand using a supinated grip, arm fully extended, and step back to create tension in the cable.
Keep your elbow close to your side and curl the handle toward your shoulder by flexing at the elbow.
Squeeze your biceps at the top of the movement, then lower the handle back to full extension under control.
Complete all reps on one arm before switching to the other side.

Form tips

Keep your elbow stationary at your side throughout the movement to isolate the biceps and prevent shoulder involvement.
Maintain a neutral wrist position rather than flexing or extending it to keep tension on the biceps.
Control the eccentric portion of each rep for at least two seconds to maximize time under tension.

Common mistakes

Swinging the torso or leaning back to lift the weight reduces biceps activation and turns the movement into a momentum exercise.
Allowing the elbow to drift forward during the curl shifts tension away from the biceps and onto the front deltoid.
Rushing through the lowering phase wastes the constant tension advantage that cables provide over free weights.

Sets and reps

For hypertrophy, perform 3 to 4 sets of 10 to 15 reps per arm, while strength work typically uses 3 to 5 sets of 6 to 8 reps per arm with heavier load.

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Frequently asked questions

Should I alternate arms or complete all reps on one side first?: Complete all reps on one arm before switching to maintain consistent tension and focus on each side. Alternating arms can lead to longer rest periods that reduce the metabolic stress stimulus.
What cable attachment works best for single arm curls?: A single D-handle is the standard choice as it allows natural wrist rotation and a secure grip. Rope attachments can also work but may feel less stable for strict curling.
How does cable single arm curl compare to dumbbell curls?: Cable curls provide constant tension throughout the entire range of motion, including at the top and bottom positions where dumbbells offer less resistance. This makes cables particularly effective for maintaining continuous muscle tension during the set.

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