Looking for possible medical expertise or next step guidance for a friend who is suffering from chronic cramps during/after cycling, hiking and other activities. Hydration and supplements do not appear to be the problem and a blood test came back negative, although I do not know the exact scope of the blood test. This has been occurring for about a year, didn't happen previously and he is currently 60. I'm concerned that maybe this might be an indication of something more serious and needs immediate diagnosis? Any insights out there? Thanks.