First Day of Partial Fasting
I was going to do my first day of partial fasting on Wednesday, but as with many things, life interfered and I ended up doing it on Thursday instead. I ate a small breakfast, a small lunch and nothing else except some fruit in the evening. I also worked out on Thursday so it was an interesting mix of physical activity and little food. Some observations on this Friday morning, the day after the start of my little experiment:
Not Too Hard
I thought it would be much harder to avoid eating but it really wasn’t. I didn’t feel hungry, probably because I ate a decent quantity of fruit. That’s a good lesson to remember for everyone. One of the best things about fruit and vegetables is the fact that they make you feel full without a lot of calories. We’ll see what happens on Sunday when I avoid fruits and vegetables as well.
Need More Water
I usually drink while I eat. However, since I wasn’t eating, I also wasn’t drinking enough. Combine that with a 5 mile run and I’m a bit dehydrated this morning. That’s easily solvable.
Less Oranges
Instead of dinner, I ate about four oranges fresh from my orange tree. That seemed like a good idea at the time but now my throat is a little soar. If I’m going to do these partial fasts by eating fruit, I need to vary it up a bit.
Energy Level
I woke up this morning feeling very refreshed. I slept well and had plenty of energy. Of course, this is just one morning which is a meaningless sample, but I don’t feel lethargic or tired.
Summary of First Day
Overall, I feel good. The partial fast was easy to do and I felt good both yesterday while doing it and today.
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And for the curious, I am going to maintain my usual workout routine while doing this. We’ll see if the fasting has any impact on my performance.

When I’ve fasted, I usually don’t exercise that day. When I did choose to exercise, at first I felt really good. But I think at some point your body realizes that you’re not exercising to catch food, and it kind of shuts you down. That’s just be though. I’m following your progress with interest.
- Dave
I think I’d worry about fasting combined with runs of much distance. Is there a possibility for getting the electrolyte balance out of whack?
@Greg
There is some worry, which is why I wanted to do these partial fasts on Wednesdays when I don’t run. However, I talked to my doctor about this initially and she gave me some warning signs to look for. I’m being careful and making sure I feel ok before doing anything strenuous.
Again, I can’t stress this enough. Please consult with a doctor before making any drastic changes to your eating or exercise habits.
Gal