Connect one end of a resistance band to a D-ring on an ankle strap, and attach a handle to the other end. Do the same for a pair of resistance bands. Grab the handles with overhand grip in shoulder width and position your hands inward at the side of your chest. Keep your back straight with a slight bend in the knees and bend forward at the waist. Head up and keep torso almost parallel to the floor.
Keep the upper arms stationary and focus on moving the forearm. Exhale and lift the handles by fully flexing your triceps. Inhale and slowly lower the handles back down to the starting position and repeat.