Rotation of the upper body while standing ► anti-rotation

Partner work

Trainee: Standing upright with hips wide apart, holding the exercise ball at chest height with arms outstretched, intercept the rotational movement triggered by the partner and return the arms to the starting position.
Partner: Pushes the arms of the active participant (the ball) to the side alternately or in random order (intensity can be varied).

Variant:
The exerciser is in a squatting position (additional strain on the thigh muscles).

1 exercise ball