This routine is a great way to start building a foundation for more challenging single leg exercises. I recommend this routine be done barefoot/in barefoot shoes to maximize the foot strengthening benefits of balance training. This can be done on a hard surface like the bare floor or a soft surface like a squishy yoga mat. Note that the bare floor option will be less challenging. This should be done by a wall or something that you can hold onto just in case you need some assistance.