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← Body by Kruze

The 72-hour fast.

The entry ritual. Not because suffering is the point — because three days without food breaks the loop most of us are stuck in. You learn that hunger is a voice, not a fact.

Read before you start

This is not medical advice.

I'm a guy who fasts. I'm not your doctor. Talk to one before you do a 72-hour fast — especially the first time, and especially if any of these are true:

  • You're pregnant, nursing, or trying to conceive
  • You have type 1 or insulin-dependent type 2 diabetes
  • You're on blood pressure, blood sugar, or psychiatric medication that requires food
  • You have a history of disordered eating
  • You're under 18
  • You're recovering from surgery, illness, or heavy training
  • Your doctor told you not to fast and you respect your doctor

If any of those apply, this isn't the place to start. Skip the fast, do the routine, message me when you want.

The journey

What the three days actually feel like.

  1. 0–12 hours

    Easy ground

    You're not hungry yet, not really. The body's still using what it ate last. Water and salt is enough. Don't congratulate yourself — this part is free.

  2. 12–24 hours

    The first voice

    Hunger talks. It's loud. It will sound like your own thinking. Drink water. Walk. Don't sit next to food. Most people quit somewhere in here because they confuse the voice for hunger that matters.

  3. 24–48 hours

    Through the wall

    Energy dips, then evens out. Sleep may be lighter. You'll have a clear head in the morning that surprises you. The hunger gets quieter, not louder. If it gets louder, that's stress not need — keep going only if your body's still fine.

  4. 48–72 hours

    The quiet stretch

    This is where the work happens. The body has fully shifted what it's running on. Most people feel calm here, not weak. Keep moving — easy walking, some bodyweight if you've got it. Don't push to max effort.

  5. Breaking the fast

    Don't ruin it

    The first meal matters more than the fast did. Start with something small and clean — half a banana, a couple eggs, a small handful of berries. Wait thirty minutes. Then eat a normal portion of clean food: rice, eggs or chicken, greens. No takeout, no sugar, no alcohol for the first 24 hours after. You earn nothing by stuffing yourself at the end.

FAQ

Most-asked questions.

Can I drink coffee or tea?

Black coffee, plain tea — yes, in moderation. They won't break the fast. Caffeine on an empty stomach can spike anxiety though, so keep an eye on yourself. Skip the sweeteners and the cream.

What about electrolytes?

Yes. A pinch of sea salt in water, twice a day. Some people add a magnesium tab or potassium. This isn't optional past 24 hours — it'll fix most of the headaches and weakness people complain about.

Can I work out during the fast?

Walk, stretch, do easy bodyweight work. Don't go for personal records. Your strength is mostly fine; your recovery isn't.

Why 72 hours specifically?

It's long enough to break the food-on-the-clock loop, short enough to recover from in a day. I picked it because it's the longest I'd ask of someone before I knew them.

How often should I do this?

Once a month is the rhythm most people land on. The first one's the hardest. The fourth one is the one that changes you.

I broke early. Did I fail?

No. You learned where your real edge is. Go again next month from a smarter starting point.

When you're ready

Open the timer. Drink water. Begin.

Three checkpoints — 24h, 48h, 72h. A note from me at each one. If you stop early, you'll learn where your real edge is. That's useful too.