Exercise guide
Dumbbell Standing One Arm Concentration Curl
- Intermediate
- Isolation
- Rep-based
- Shoulders
- Upper arms
This unilateral isolation exercise targets the biceps brachii, specifically emphasizing the 'peak' by using the inner thigh as a brace to eliminate momentum and ensure strict form.
Reviewed by the Crucible team · Updated June 2026
Muscles worked
Setup
- Stand with your feet wider than shoulder-width apart and knees slightly bent.
- Hinge forward at the hips, keeping your back flat and core engaged.
- Hold a dumbbell in one hand and press the back of your upper arm (triceps) firmly against the inside of your thigh on the same side.
- Place your non-working hand on your opposite knee or hip for stability.
How to do it
- Exhale as you curl the dumbbell toward your shoulder, keeping your upper arm pinned against your thigh to prevent swinging.
- Squeeze your bicep forcefully at the top of the movement for a one-second peak contraction.
- Inhale as you slowly lower the weight back to the starting position over a 2-3 second count.
- Maintain a slight bend in the elbow at the bottom to keep constant tension on the muscle before starting the next rep.
Form checklist
- Keep your torso stationary; do not use your back or shoulders to lift the weight.
- Ensure the elbow remains fixed against the inner thigh throughout the entire set.
- Keep your wrist neutral or slightly flexed to avoid strain and maximize bicep engagement.
- Maintain a flat spine and avoid rounding your lower back while leaning forward.
Pro tips
- As you reach the top of the curl, rotate your pinky finger toward your shoulder (supination) to maximize the contraction of the bicep's short head.
- Focus on the mind-muscle connection by watching the bicep contract; the visual feedback helps improve motor unit recruitment.
Make it harder
- Add a 3-second isometric hold at the midpoint of the eccentric phase to increase time under tension.
- Use a 'fat grip' attachment or wrap a towel around the dumbbell handle to increase forearm and grip strength requirements.
Frequently asked
- What muscles does the dumbbell standing one arm concentration curl work?
- The dumbbell standing one arm concentration curl primarily targets the biceps, and also works the deltoids and trapezius as secondary muscles.
- What equipment do you need for the dumbbell standing one arm concentration curl?
- The dumbbell standing one arm concentration curl uses dumbbell.
- Is the dumbbell standing one arm concentration curl good for beginners?
- The dumbbell standing one arm concentration curl is rated intermediate. Build a base with simpler variations first, then progress to it with light load and strict form.