<iframe width="390" height="230" src="https://www.youtube.com/embed/8rHrh2bNz4E" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" allowfullscreen></iframe> 1. Starting in a plank position with feet slightly apart. 2. Rotate your body so that your right hand reaches upwards and you are in a side plank position. 3. Slowly return to a plank position in a controlled manner. 4. Repeat on left side.