Hi allI am officially an old timer - 18 months or more for me. Twitching was my only initial symptom although I have since gone on to get an array of other things especially a stiff calf. Anyway, others have written about how their BFS is associated with muscle pain and exercise intolerance. I felt lucky that this didn't apply to me - I can jog (albeit slowly) for 30 mins and I walk briskly up a steep hill several times per week. However I played competitive soccer for the first time in over 10 years last weekend for a 'masters team' - aged 45 and over. I am 45 myself and so was the youngest player on the pitch and thought that the regular exercise that I do would stand me in good stead as regards fitness. I was surprised that I could only manage half a game due to muscle pain in my legs, not due to physical exhaustion. I assumed that this is because I was not 'match fit' but I now wonder if it BFS-induced exercise intolerance. We all expect some degree of muscle pain after unaccustomed new exercise - accumulation of lactic acid in the muscles and all that - so I wasn't surprised that I could hardly walk the day after the game but what surprises me is that 5 days later I am still so incredibly sore and achey in my thigh muscles. Again, I assume this is part of BFS. I also have this horrid calf pain which is a near-cramp mixed with a sharp twinge of pain and does not feel like 'sore muscles'.So my questions to other people with muscle pain and exercise intolerance are;1. Does my description sound familiar?2. Did your exercise-induced symptoms appear later i.e. > 1 year after the twitching started?3. Any suggestions other than stretching/ warming up, massage, warm baths...? I've tried magnesium and carnitine with no luck and also CoEnzyme Q10.PS Despite the severe muscle pain, I am going to carry on playing soccer each week - it was great fun!Thanks for your adviceRegardsSimon