Cossacks were light on their feet and had such famously strong legs that they often seemed to fly above ground in battle. Cossack, as you might have guessed, focuses on the lower body muscles to deliver a powerful, targeted workout that will supercharge your muscles and help increase your strength. Raise your knees to waist height when doing March Steps and don't forget to pump your arms.
Extra Credit: 30 seconds rest between sets.
