The Supinated Grip (Underhand) Lat Pulldown is a classic vertical pulling exercise specifically designed to maximize the contraction and development of the latissimus dorsi (lats) while placing a greater emphasis on the biceps and lower lats compared to a pronated (overhand) grip. 
Key Features
• Grip Orientation: A supinated (underhand) grip means your palms are facing toward your body. This subtle change in wrist position alters the recruitment pattern of the back and arms.
• Targeted Muscle Focus: The supinated grip tends to promote greater activation of the lower and inner fibers of the lats, leading to increased “thickness” and the coveted V-taper shape.
• Biceps Involvement: Due to the hand position, the biceps brachii act as a stronger synergist (helper muscle), making this variation excellent for simultaneous back and arm development. The Supinated Grip (Underhand) Lat Pulldown is a classic vertical pulling exercise specifically designed to maximize the contraction and development of the latissimus dorsi (lats) while placing a greater emphasis on the biceps and lower lats compared to a pronated (overhand) grip. 
Key Features
• Grip Orientation: A supinated (underhand) grip means your palms are facing toward your body. This subtle change in wrist position alters the recruitment pattern of the back and arms.
• Targeted Muscle Focus: The supinated grip tends to promote greater activation of the lower and inner fibers of the lats, leading to increased “thickness” and the coveted V-taper shape.
• Biceps Involvement: Due to the hand position, the biceps brachii act as a stronger synergist (helper muscle), making this variation excellent for simultaneous back and arm development.