Yonex has been monopolizing the badminton racquet market and still does. New competitors have come and go over the years without much success. Introducing Li Ning, a brand that shows great potential to challenge Yonex.
Part 2 of this short documentary continues to explain the different designs of racquet to suit different styles of player.
China's CCTV made a short documentary about the sport of badminton. It is a pretty interesting clip to watch where Part 1 talks about the science and evolution of badminton racquet from the 60's onwards.