After completing the Cambridge Half Marathon on Sunday in 2hrs 17mins through snow, sleet and sub zero temperatures I have come to the conclusion that fasting the day after was a big mistake! My body (even today) is aching and all the energy I burned off on Sunday just made me want to eat all day on Monday
I've decided to write off Monday's fast and I will change my days this week to Wednesday and Friday!
Well done on your half marathon - that's brilliant! Yes, I think if you're going to do a major sporting activity, the best thing to follow it up with is a planned feast day to make sure you're eating healthy food rather than just snacking. You can fast another day. Work your fasts around your lifestyle, rather than squeezing your life into fasting.
Well done on your Half Marathon - I couldn't even do a mile, especially not in the conditions you described!
Definitely the right decision not to fast afterwards, your body will be needing to recover from all that. Don't even worry if you don't get 2 fasts in this week, I'm sure the marathon will help towards your calorie deficit, and it is only one week afterall. There's always next week!