I have just returned to cycling after 20 year to find that I suffer from the same painful thigh muscle pains that I suffered all those years ago which made me quit the sport. They tend to start a few days after a training ride and they last about 3 days before they clear up.....this happens around every three month where between I can ride as hard as I like without any effects...please help as this is driving me nuts and I may have to cancel the eddy Merckx bike I have just ordered....