Strength exercise

Pull-up (Underhand)

How to do it

Grip the bar with an underhand, palms-facing-you grip about shoulder-width apart, and hang with arms fully extended.
Brace the core and keep the shoulders pulled down before starting the pull.
Pull your chest toward the bar, keeping the elbows close to the torso so the biceps share the work with the lats.
Finish the pull as your chin clears the bar, squeezing the shoulder blades together at the top.
Exhale on the pull up, then inhale as you lower back to a full hang with control.
Keep the wrists straight and avoid curling them inward, which keeps tension on the biceps rather than the wrists.

Latissimus DorsiLarge back muscle responsible for shoulder extension, adduction, and internal rotation. All Latissimus Dorsi exercises

BicepsMuscles located in the upper arm, primarily responsible for flexing the elbow. All Biceps exercises