Sorry fr the delay and not reading everyone elses yet- the connection is a bit slow. So, cramp- I got it in my first marathon, and tried to identify all sorts of nutritional reasons for it- but in reality I was chronically undertrained. The same happened in Berlin and in Halstead which was my third I hadn't missed any of my 5x per week runs in the lead up and still got cramp- despite electrolyte drinks chia seeDS supplements etc.
last year in Manchester was my first marathon at race pace I had no cramp- I had been strengrh training for about 6-8 months consistently in the lead up and even in the week before. My legs and my core were just strong and I really don't think my doms is as bad as it still is now- I even ran london the following weekend to pace Rachel.
in my business I say the purpose of strength training is to make you a more resilient runner- this means injury prevention and correcting imbalances. Quite tough to explain the science on here but if you are squating or lunging with 50%+ of your body weight, it challenges your motor units in such a way that they recruit better the next time, which is why you are able to lift heavier weights the following week or a few weeks later. I have not done enough of this in this campaign and I noted a weakness in my right glute a couple months ago that I haven't worked on, so no wonder the rest of my right leg was taking extra load and one part/ my calf, wasn't strong enough to handle it- sorry to ramble, do pm me or contact me on my facebook page- I Run Success for more xx