Main Muscle Worked: Calves
Other Muscles Worked: None
Equipment: Barbell
Mechanics Type: Isolation 
Tips: This is a great option to calf training without fancy machines. From a standing squat position with a barbell on your back, perform a standard calf raise, but as you return your feet flat to the ground raise the toes off, hence “rocking back.” Now a word of caution to those over-zealous types: perform with caution and get the feel of the exercise as tempo should be slow with total control. Can also be done by holding two dumbbells in your hands.