As my runkeeper on my phone keeps kindly reminding me, this time last week I was running 6  miles in the best time I’ve done in ages. I was feeling quite positive about the half marathon I’m doing in June and was convinced I must be losing weight. Sadly, this week it has all gone wrong. Work has been really busy, Libby has been poorly, the weather has been cold and rubbish and, quite frankly, I couldn’t be bothered.  To add to my sedentary lifestyle, I managed to drag myself out once this week to exercise. This involved a two hour…