I like to think that this isn't an "injury," but I guess it can cause a lot of injuries, so this seemed to be the most appropriate place to post this. Almost two years ago I was diagnosed as having two types of Ehlers-Danlos Syndrome (EDS). I have type 2 (classic) and type 3 (hypermobile). Here's a ridiculously short summary that won't come close to fully informing you, but you'll get the important parts: 1) it's a group of inheritable connective tissue disorders, caused by problems with synthesizing the body's collagen 2) it causes ranging severity of laxity in up to all joints of the body (resulting in hypermobility and subluxations/dislocations) 3) it causes chronic pain in up to all joints of the body 4) it can be different for everyone who has it 5) there is no cure, treatment is supportive If anyone is more interested in EDS, feel free to ask away or check out the wiki page on in. I'll link it for convenience: http://en.wikipedia.org/wiki/Ehlers–Danlos_syndrome So addressing the main concern (with regards to badminton), does anyone else deal with loose joints? I haven't gone into much detail about how I handle it and how it affects me, but I will upon request. I am just curious if anyone also experiences this or has familiarity with the subject.