The Barbell Curl is a popular strength training exercise primarily targeting the biceps. It involves holding a barbell with both hands, palms facing upward, and curling the weight towards the shoulders. This movement helps to build muscle mass and strength in the upper arms. To perform the exercise, stand with feet shoulder-width apart and grip the barbell with an underhand grip. Keep your elbows close to your body and avoid swinging the weight. Slowly lower the barbell back to the starting position after reaching the peak of the curl. Proper form is essential to prevent injury and maximize effectiveness.