01/05/2022
Regaining weight after a fast can be frustrating, but it’s normal. We’re evolved to oscillate between fasting and feeding—to lose weight and gain it back again.
When we fast, we trigger metabolic machinery that gets us burning fat and making ketones. We upregulate key factors involved in DNA repair, immune health, and a cellular recycling program called autophagy.
When we feed, we rebuild. We synthesize muscle, rebuild cell parts, and generally grow.
Refeeding will trigger weight gain after a fast. This is inevitable. The human body burns energy at rest through thermoregulation, respiration, and other processes.
It keeps burning energy during a fast, leading to a loss of mass. Some of that mass comes back along with the refeed, and we WANT this. To the degree that fasting appears to benefit organisms, the refeed process appears to be as important as the time spent fasting.
Fasting also increases water loss, so a lot of fasting-driven weight loss is actually just that—water loss.
My main point is this: When you break your fast, you’ll regain some weight—water or otherwise—and that’s a good thing. That being said, there are certainly ways to minimize fat gain in the process. That’s one big reason folks fast in the first place: body recomposition.
MINIMIZE WEIGHT GAIN AFTER FASTING
DON’T GORGE YOURSELF
Even if you do everything else right, overeating after a fast can derail you.
When the clock finally hits mealtime, it’s tempting to play the role of the starving jackal who’s just located a fresh buffalo carcass. Believe me, I know. But if you behave like the jackal, the consequences may include:
- Indigestion
- Food on your shirt
- Increased inflammation
- Nagging feelings of guilt
- Increased weight gain
- Concerned looks from dining companions
The smart thing to do is plan a normal-sized meal. A plate of chicken or fish with low-carb vegetables soaked in olive oil is a good template to play with.
Combine this with proper hydration (sodium plus fluids) and you’ll be well-positioned to benefit from your fasting feeding cycle.
And don’t worry if you regain some of the weight you lost during a fast. That’s what’s supposed to happen.