it started actually almost 20 years ago! I am an avid bicycle rider, nearly 80 to 100 miles a week. it all started after strep throat. muscle in legs so painful, muscles feeling flaccid for hours then hard as rock for hours, legs were so weak felt like soggy noodles, walked for 20 minutes and my legs took 7 to 8 days to recover! symptoms a lot better but symptoms come back sometimes in 2 months sometimes in 2 years! I do get a butterfly rash on nose when flares, could this be lupus? I just turned 57 but before this i could bike 3 days in row now only once or twice a week? what is this? help