Cross Body Hammer Curl
The cross body hammer curl is a standing dumbbell curl done with a neutral, thumbs-up grip, where you curl the weight diagonally across your body toward the opposite shoulder instead of straight up. That diagonal path changes the angle your biceps and forearm pull from, which makes it a useful variation once straight hammer curls feel routine. It only needs one dumbbell at a time and a bit of room to move your arm across your torso.
Why it works
A neutral grip shifts some of the work from your biceps toward the brachialis, the muscle underneath it that adds width to your upper arm without showing up as a separate peak. Curling on a diagonal, toward the opposite shoulder instead of straight up, changes the angle your shoulder and elbow work through compared to a standard curl, which is why this variation is useful for hitting the arm from a slightly different line of pull once the basic hammer curl stops feeling challenging.
Set up
- Stand tall holding a dumbbell in one hand with a neutral grip, palm facing your body.
- Let your arm hang by your side, elbow close to your ribs.
- Keep your other hand free or resting on your hip for balance.
How to do it
- Curl the dumbbell up and across your body toward the opposite shoulder, keeping your palm facing in the whole way.
- Let your elbow drift slightly forward as you cross the body, without swinging your whole upper arm.
- Pause briefly near your opposite shoulder and squeeze.
- Lower the dumbbell back along the same diagonal path, under control.
- Finish all reps on one arm before switching to the other.
Form cues
- Palm faces in the entire rep, no rotating toward your face.
- Elbow leads slightly, not the whole shoulder.
- Cross toward the opposite shoulder, not straight up the middle.
- Lower on the same path you curled up on.
Breathing: Exhale as you curl the dumbbell across your body, and inhale as you lower it back down.
Common mistakes
Swinging the shoulder forward to help drag the weight across.
Fix: Keep your upper arm close to your torso and let your elbow do the small forward drift, not your shoulder.
Rotating the wrist toward a regular curl grip partway up.
Fix: Keep your palm facing your body for the entire rep; that neutral grip is what makes this variation different.
Using a weight heavy enough that the rep turns into a full-body heave.
Fix: Drop the load until your arm alone can control both the lift and the lowering.
Curling straight up instead of on the diagonal.
Fix: Aim the dumbbell toward your opposite shoulder, not straight up your own side, or you're just doing a regular hammer curl.
How to program it
- This is a light isolation move for a small muscle group, so two sessions a week per arm, spaced a few days apart, is enough to make progress.
- 3 sets of 10 to 12 reps per arm fits well, since the diagonal path favors control over heavy loading.
- Slot it in after your main pulling or pressing work, alongside other single-joint arm exercises.
- If straight curls have your elbows feeling beat up, rotating this variation into your routine gives the joint a different line of stress.
Safety notes
- Keep the motion slow and controlled rather than swinging the dumbbell across, which can strain the elbow and shoulder.
- If you feel pinching at the front of the shoulder as you cross the body, shorten the diagonal or switch back to a straight hammer curl.
Exercise profile
- Force
- Pull
- Mechanics
- Isolation
- Category
- Strength
Frequently asked questions
How many reps of cross body hammer curls should I do?
3 sets of 10 to 12 reps per arm is a solid range. Keep the weight light enough that you control the diagonal path the whole way, not just the lift.
What can I do at home if I don't have dumbbells for cross body hammer curls?
A resistance band anchored near your feet can replicate the same diagonal curling path with light tension.
Cross body hammer curl vs regular hammer curl: what's the difference?
A regular hammer curl moves the dumbbell straight up your side. The cross body version angles the curl toward the opposite shoulder, which changes the pull direction slightly and gives the arm a new stimulus.
Why do I feel this exercise more in my forearm than my biceps?
That's expected with a neutral grip; hammer curl variations shift more work to the forearm and the muscle underneath the biceps than a regular palm-up curl does.