Turns out the reason I've been a bit tired lately (or one of them, at least) is that my iron has gotten stupid low again. I don't know my haemoglobin results (the iron "cheque" account), as we weren't testing specifically for iron, but my ferritin (the iron "savings" account) was 7 at my last test (the "acceptable" range is generally 20-250).
I'm supplementing and trying to up the red meat and down the caffeine for now. Although I'm still being active (getting about 7ish hours a week in), I'm trying to give myself a break if I feel flat. So that's partly why I've been a slack blogger (but really, it's cos I AM a slack blogger!)
Happy training, and be back soon :)