Recently I completed my 2nd marathon.
As in the previous marathon, and unlike most of the training sessions (longest being 38km), I encountered muscle cramps from approximately the halfway mark (i.e. 21km). In the previous week I did my best to consume sufficient amounts of magnesium and potassium, and throughout the race I consumed salt capsules. I completed the race although it was quite a struggle.
I am soliciting inputs on why these cramps occur and why so soon (again, in training over 4 months I barely encountered such cramps.
I am speculating that I had low levels of blood sugar early on which triggered the events (I did eat/drink sufficient amounts during the race to overcome that).
Any comments/thoughts are much appreciated.