If there is nothing wrong with the knee system during aerobic exercise, there is no need to wear knee pads. I am an aerobics enthusiast. I do aerobics in the square every night. Never heard of wearing knee pads. You hardly need to wear knee pads to do aerobic exercise. Aerobics is almost marching aerobics, mainly in the upper body, arms, legs and feet.

If you have a knee injury and feel comfortable with knee pads, you can still go to Tmall /JD. COM flagship store of the popular Japanese brand "SIGMAX Shima".