The "Underhand Grip," also known as a supinated grip, involves holding a barbell or dumbbell with palms facing up. This grip is commonly used in exercises like bicep curls and pull-ups, targeting specific muscle groups more effectively. It emphasizes the biceps and latissimus dorsi muscles, promoting strength and muscle growth. Using an underhand grip can also enhance grip strength and improve overall performance in various lifts. It is important to maintain proper form to prevent injury and maximize benefits. This grip variation can be incorporated into a balanced workout routine for better results.