Sorry . Try and mix it up if you can though, purely from an injury prevention perspective. If that's out of the question then some ankle-strengthening exercises would be worthwhile, and stretch stretch stretch. Hold for 30 seconds x 3 for each one (I have stupidly short hamstrings and always get tight calves). I don't know how much of that you already do, I'm just throwing it out there for everyone else too... Obi Anne, do you drink plenty of water? I don't know how that'd effect your diabetes, but my mate always 'overheats' and I tell him every time to drink more water (it's mainly coffee!) but he never does lol. When I'm in training mode I always have a glass of water on my desk and have 2 pints minimum by the time it comes to running in the evening (I just tend to sip in the hour or two before I run).