Tabata 2, Exercise 4: Russian Twist Start sitting upright in your chair with your elbows bent and your hands at chest or shoulder height. Rotate your core from side to side, twisting with your torso. Grab onto the chair if need be. Repeat this for 20 seconds total, then rest for 10 seconds. Repeat this four-move Tabata one more time through. Image Source: Courtesy of Matthew Henton