These pictures are comparing a pre-fasting race, with my running 6 back-to-back half marathon while fasting (after fasting for a month).
One of the problems I have with my running is losing weight. The reality is that my weight has a lot to do with my running times. Basically you can run a half-marathon 1 minute faster for each pound that you lose - so I am very inspired to lose weight. But using the old fashion counting of calories in/calories out has only worked so-so with me. That is why I changed to intermittent fasting to lose weight on August 20th 2019.
Since I run half marathons throughout the year - I am always in training. So while I am in training I do a 20:4 fasting window, one meal per day while I am training, and switch to a 16:8 on the day of the race.
What about energy? I don't find fasting makes me drag at all - but instead I feel lighter and energized. I fast from 7 PM - 3 PM - and my toughest training runs are 11 AM - 1 PM (16-18 hours into my fast). I believe as your fasting continues, your body becomes very efficient at using body fat to run on.
Since I have been fasting I have lost 20 lbs! I started my fasting at 215 lbs, and as of yesterday, I am 195 lbs. My hope is to run my best half marathon in Brooklyn this October.
