Sit on a bench with your feet flat on the ground and your knees bent. Hold a barbell with an underhand grip, palms facing up, and your hands shoulder-width apart. Rest your forearms on your thighs, allowing your wrists to hang off the edge. Slowly curl your wrists upward, bringing the barbell towards your forearms. Pause for a moment at the top, then slowly lower the barbell back down to the starting position. Repeat for the desired number of repetitions.
GIF
