This had better be comfortable; Breathable; Soft running shoes or sneakers. According to you on the treadmill, spin the bike. Or the requirements for instrument movement are different. Usually sports shoes. If you are a treadmill or spinning bike, I suggest sports shoes. It has less wear on feet and a certain damping effect. Of course, it is best not to wear shoes when the equipment moves.

Code word is not easy, hope to adopt.