In which plane is a bicep curl primarily performed?

The bicep curl is primarily performed in the sagittal plane. The sagittal plane divides the body into left and right halves and is associated with movements that involve flexion and extension. During a bicep curl, the movement occurs primarily at the elbow joint, where the arm bends to lift the weight towards the shoulder, showcasing flexion.

This action aligns with the sagittal plane, as it emphasizes forward and backward movements. In contrast, movements in the transverse plane involve rotation, and activities in the frontal plane focus on movements that bring limbs away from or towards the midline of the body. The vertical plane is often conflated with the anatomical position or a directional reference, but it does not specifically describe the movement patterns involved in a bicep curl. Thus, recognizing that the key motion in a bicep curl—flexing the elbow—is best defined within the sagittal plane is essential.