B. Lorraine Smith
1 min readFeb 28, 2023

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I've definitely found fasted running to be a very handy thing - simplifies a whole host of details. I was mostly running fasted through the last few months - up to 20km steady pace.

This was the unintentional impact of doing a dietary reboot where I switched from very carb-heavy plant-based to very low-carb local animal products (including fat). Without really meaning to, I guess I become "fat adapted" and then more metabolically flexible. That meant that I'd wake up and instead of going for toast first thing, I was "full" from last night's dinner at 6pm. So I'd just run. And it felt great.

I have recently adapted to fueling before again (sometimes) because I'm in a marathon training plan that I'm finding is really amping up how much fuel I need, overall, and fasting meant shorter eating windows during which it was just too tricky to get enough food in me.

But I like to keep the option in my back pocket!

Great piece - thanks for sharing this.

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B. Lorraine Smith

Former sustainability consultant replacing ESG with reality-based insights about corporate purpose and impact. https://www.blorrainesmith.com/