How can I properly perform a barbell drag curl to target my biceps effectively?

To properly perform a barbell drag curl for effective bicep targeting, stand with feet shoulder-width apart, hold the barbell with an underhand grip, keep elbows close to your body, and slowly curl the barbell up towards your chest while keeping it close to your body. Lower the barbell back down in a controlled manner. Focus on squeezing your biceps throughout the movement for maximum effectiveness.