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Metabolic health, answered plainly.

Real questions people ask, and Foster’s answers, in his own words. Search yours, browse by pillar, or ask a new one. No jargon, no login, no medical gatekeeping.

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I'm already eating in a calorie deficit and the weight won't move. What am I missing?

Before you worry about eating in a deficit, make sure you are eating the right foods and paying attention to how often you eat.

Jumping straight to restriction can backfire and send your hormones further out of whack, especially if they are already struggling. A lot of calorie deficits and diets do exactly that.

Fix what you eat and how often first. The deficit can come later, if at all.

From the article: Why the Same Diet and Exercise Stopped Working After 40 →

How do I actually become fat-adapted so fasted training stops feeling awful?

The best on-ramp I know is Zone 2 walking, fasted, first thing in the morning. Easy, conversational effort. Do that consistently and your body stops panicking and asking where its glucose is, because you have already told it that using stored fat is fine.

Be patient with the timeline, though. It took me years to reach real fat adaptation, because to unlock your fat stores you first have to stop being fat-resistant, where those stores are not easily accessible. It is not a two-week project. But once the switch clicks, you get steady energy the whole way through with no slump.

From the article: The Fasted Exercise Crash Isn’t What You Think →

Can I do heavy lifting or hard cardio during a long fast?

I would pull back on that. A fast is a healthy stressor, but it is still a stressor, and so is heavy lifting or Zone 3 work. You cannot pile natural stressors on top of each other and expect your body to be fine with it, even when each one is good for you on its own.

Do the harder stuff in shorter bursts, and on an extended fast, pull right back to walking. The priority on a long fast is the fast. Missing a couple of weeks of hard training and just walking instead costs you nothing, because you are supporting every other pillar while you are in that mode. You are gaining in the long run, not giving something up.

From the article: The Fasted Exercise Crash Isn’t What You Think →

I feel completely wrecked mid-workout when I train fasted or on OMAD. Should I just eat first?

Before you change anything, understand what that feeling is. That drained, out-of-energy wall is your body burning through its stored sugar and trying to switch over to burning your own fat. It is not a failure. It is the adaptation happening.

I watched this on my morning walks. I would be completely drained near the last quarter, then about five minutes later a second wind would roll in and I would finish strong. As I stayed consistent, that gap shrank from five minutes to three to one, until it was seamless. So the wall is exactly where most people quit, five minutes before the thing they wanted was about to click. Push a little further and meet the second wind.

From the article: The Fasted Exercise Crash Isn’t What You Think →

I slipped and ate on my fast day. How do I recover without spiraling into quitting?

At the crux of it, you prioritized the dinner over your fast. You made that call, and that is okay, it is a choice you are allowed to make. Own it. The mistake is not the dinner, it is turning one choice into a permanent one by giving up. It is what you do after the setback that defines you.

I do the same thing. I have ended a rolling 65 at 48 and just jumped right back on the next cycle. Use the 80/20 rule, do not beat yourself up, and get back to your ADF next round. Giving up is the only move here that actually costs you anything.

From the article: You Ended Your Fast Early. Now What? →

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