What would you advise me to do if my calves start to tighten and cramp on
the run portion?
Cramping in the calves during the run is not as common as cramping in the
quads, in part because the quads are used significantly on the bike and
left very fatigued.
Calf problems are generally caused by running too much on your toes.
Relax your stride, strike the middle of your foot first (on the outside)
and I think you'll find the problem will subside.
I have managed to make all three of these mistakes, and have eliminated
them - and the calf cramps - to a large degree.
If you do get cramps, here's my advice: stop and stretch. I can loosen the
cramps in 20 seconds of stretching, which is nothing compared to the price
of running slower for the entire race. After stretching, take it easy for
half a mile. You'll be amazed at how much better you feel and how much
faster you can go. This is not something you can "run through," at least I