Shoes and footwork
Badminton happens in sharp lateral bursts. Look for a stable heel cup, enough toe room, and a sole pattern for indoor wood or mat—running shoes and outdoor tread are poor substitutes.
Width and comfort
A shoe that is too narrow will drive compensation in your knees and ankles. If you have a history of plantar or patellar issues, favor honest cushioning and a fit check over marginal weight savings. This site does not provide medical advice—see a clinician for persistent pain.