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Intermittent fasting for beginners

Start shorter than you think, keep the first week boring, and let the habit do the work. Everything below is what a first month of fasting actually asks of you.

Burn ships nine schedules starting at 11:13, so the beginning is a real setting rather than a compromise.

Burn's Choose a Plan sheet, showing programs tagged Beginner and Quick Plans starting at 11:13

Burn's timer at 2 hours 14 minutes into a fast, the stage pill reading FED

Burn's timer at 16 hours 22 minutes with the goal met on a 16:8 fast

Where to start

Your first fast should feel easy

A twelve hour fast is a far better first week: finish dinner, sleep, eat breakfast a little later than usual. That is the whole protocol.

Move up when the current length stops taking effort, not on a schedule. Every step below is a plan you can select in Burn.

The beginner ladder

11:13 Eleven hours fasting, thirteen eating. Barely a change to your day.

12:12 A clean split. Sleep covers most of it.

13:11 Glycogen Depletion territory. Still comfortable.

14:10 Where Fat Mobilisation begins, and where hunger tends to show up.

16:8 The one everyone means. Arrive here in week three, not day one.

Choosing a schedule → The 16:8 guide →

Or let a program set the pace

Burn's programs are tagged Beginner, Intermediate and Experienced, and they schedule the fasts for you day by day.

BEGINNER

7-Day Fasting Kickstart

One week, built to get a first fast finished.

BEGINNER

14-Day Weight Kickstart

Two weeks with the lengths already decided.

Burn's 7-Day Fasting Kickstart program detail

Week one

The first week is the hardest, and it gets easier fast

Nothing dangerous is happening. Your body is used to being fed on schedule and is sending signals to remind you. Those signals fade within days.

DAYS 1-2

Hunger arrives at your usual meal times

You may feel irritable, distracted, or get a mild headache. Drink plenty of water, have black coffee or tea, and keep busy.

DAYS 3-4

The pattern starts to shift

The intense cravings of the first two days fade. This is the point where the fast stops occupying your attention.

DAYS 5-7

It becomes a routine

Once the week is behind you, the schedule is doing the work. Burn's streak and stage history are there to keep it going.

Burn includes The first week: what to expect in its in-app library, one of fifteen articles available free.

Burn's in-app article The first week: what to expect, subtitled Your beginner's survival guide

Four rules

What actually decides whether this works

Not the schedule. These four.

Water, salt, black coffee, plain tea

Anything with calories ends the fast in practice. Milk in coffee is the one that catches people out most often.

What breaks a fast →

Eat normally in the window

Two ordinary meals, not a reward. Eating your way back through the deficit is what leaves a month of fasting showing nothing.

Nutrition Window guidance →

Consistency beats duration

Five finished 14 hour fasts do more than one heroic 24. Burn counts streaks, records and completions for exactly this reason.

Streaks and records →

Plan for hour 14, not hour 2

Hunger comes in waves that peak and pass. Knowing which hour the wave lands in is most of the battle.

What happens at 14 hours →

Burn's Struggle Support sheet listing six tools, with the current fast at 15 hours 26 minutes

Burn's 20 minute hunger timer counting down on the fast screen

When it gets hard

Six tools for the hour you want to quit

Burn opens a support sheet mid-fast instead of leaving you with a countdown. The 20-minute rule starts a hunger timer and keeps ending the fast available while it runs. Drink water first logs a glass and starts a ten minute timer.

Motivation, distraction, a symptom check and a reminder of why you started make up the rest. All six are free.

See all six tools →

Fasting suits most healthy adults, and not everyone

Speak to a doctor before starting if you are pregnant or breastfeeding, have a history of eating disorders, take medication timed to meals, manage diabetes, or are under 18. Stop and eat if you feel unwell, whatever the timer says.

What Burn tracks, and what it does not

Burn maps elapsed time to named stages, drawing on peer-reviewed research for the description of each one. It does not measure ketosis, autophagy, or metabolic state, and it is not medical advice.

Start with twelve hours tonight

Pick a plan, name the fast, and let Burn handle the clock, the stages and the week that follows.

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