You have probably seen people with hypermobility syndrome on television or among your friends, maybe you have it. Many people can go through life without ever having a diagnosis because they never have cause to visit a physiotherapist or to say to their doctor "Hey, look how far back I can bend my fingers/knees/elbow etc". By the way, if you talk to your doctor like that I am going to worry about you a little.
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I did used to bend my thumb further around the back of my hand without realising I had, but like I said, I try to be more careful these days so have only moved it a little. Even so, I still get told off when I inadvertently do that. It's far less entertaining and exciting than someone standing on their own head (I wonder if they worry about foot odor when they do that?)
Anyway, while I was lying in bed in the early hours I had the great idea of at least exercising one leg by doing leg raises. Okay, yes, if I was a healthy person it may be classed as cheating to use a resistance band to assist a little, but I'm not a healthy person and I need the extra help. I could only do this using my right leg and could not hold the resistance band with my left hand because of my shoulder so, again, just used my right hand. I did sets of side and front leg lifts and did a little triceps work on my right arm, no resistance other than gravity.
I took my time and did the movement very slowly, which adds to the exercise, and also spaced things out. It may not sound an awful lot to many people and back before the pain conditions crept up on me I would have thought the same. Nowadays though, trust me when I say that even that small amount of exercise caused an increase in pain that made me feel quite sick for a while. Despite that I am pleased that I did it. I miss being able to weight train, which I always loved, but something is always better than nothing.