Recently a client reported a severe cramp in a calf during consecutive runs. The first cramping occurred while trying to do an all-out six minute run (it is a field test I do with runners); the next day during an easy run he cramped in the same calf. He noted that he was well-hydrated for the first run and ran with a Cameback the next day.
Well, it inspired me to write about cramping. Contrary to folklore (and what I was taught) cramping during exercise is not a result of dehydration or electrolyte loss. Cramping is a neuromuscular issue. I will make the case for this new theory, but first let's take a look at the traditional view of cramping.