Russian twist

Coreintermediaterepsfoot anchor (optional)

Seated with knees bent and feet on the floor, torso leaning back about 45 degrees with a straight back, hands together in front of the chest, the rib cage rotates to one side then the other while hips and legs stay still.

How to do it

1. Sit on the floor, knees bent about 90 degrees, heels/feet flat on the floor.
2. Lean the straight torso back to about 45 degrees so torso and thighs form a V; arms extended in front of the chest with hands clasped.
3. Exhale and rotate the shoulders and rib cage to the right until the clasped hands are beside the right hip, arms roughly parallel to the floor; head turns with the chest.
4. Return through the centre and rotate to the left the same amount.
5. Buttocks and feet stay planted, knees do not sway; the lean angle stays constant.

Muscles worked

Main: obliques
Supporting: abs