FastTrack - Circadian Precision Intermittent FastingFastTrack
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Weekly PatternRatio: 5:2

5:2 Weekly Protocol

Intermittent Weekly Calorie Pattern

Unlike daily hourly windows, 5:2 organizes your week. On 5 days you eat normally according to appetite. On 2 chosen non-consecutive days (such as Monday and Thursday), energy intake is reduced to roughly 500-600 kcal.

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5:2 Weekly Protocol
Fasting Start
Weekly Rhythm5 : 22 Days Reduced Calorie
Non-consecutive weekly pattern

Your Calculated Schedule Blueprint

5:2 Weekly Protocol • Weekly Rhythm Model

5:2 WEEKLY CYCLE
Fast Duration
2 Days / WeekReduced intake
Eating Window
5 Days / WeekRegular intake
Fast Starts
Mon & ThuRecommended days
Break-Fast (1st Meal)
Tue & FriResume normal eating
5:2 Weekly Horizon7-Day Rhythm
Mon500 kcal
TueRegular
WedRegular
Thu500 kcal
FriRegular
SatRegular
SunRegular
5 days regular intake, 2 non-consecutive reduced-calorie days (~500–600 kcal).
Local Timezone Synchronized
Local execution • Zero data collected

How the 5:2 Weekly Protocol Works in Practice

The 5:2 method organizes your week rather than counting hours daily. On five days, you eat normally in accordance with biological appetite. On two chosen non-consecutive days (such as Monday and Thursday), energy intake is capped at approximately 500-600 kcal.

Example Daily TimingRegular: Tue, Wed, Fri, Sat, Sun. Reduced intake: Mon & Thu.

Biological Focus & Benefits

Metabolic Action: A weekly energy intake rhythm rather than a daily hourly restriction.
Target Audience: Those who prefer not to observe daily hourly clocks and favor weekly lifestyle rhythm.

Fasting Rules for 5:2

  • Drink abundant water, sparkling water, or unsweetened tea.
  • Avoid added sugars, milks, or snacks during fasting hours.
  • Break fast with whole protein and healthy fats.
  • Shift window by 1–2 hours if necessary for social life.
Medical Safety

If at any point during your fast you experience extreme dizziness, nausea, or shaking, break your fast immediately. Fasting is not advised for pregnant/nursing mothers or individuals with eating disorders.