Which Side of Bosu Is Harder?
BOSU balls have two main sides - the flat platform and the half medicine ball - both of which can be used for exercising. The flat platform provides a hard surface to work out on, while the half yoga ball has a round surface that changes shape from pressure. Generally, the flat platform side is easier to use as it provides an even surface to stand on that spreads out pressure evenly, while the ball side is harder to exercise on due to uneven pressure.