Dr. Suhas Kshirsagar blends the Ayurvedic daily routine (Dinacharya) with modern chronobiology. His argument: almost every cell runs on "clock genes", and when your habits fight those clocks (eating late at night, sleeping in, spending your days under dim indoor light) you end up in circadian desynchrony: tired, poorly rested and out of sorts.
The Three Periods of the Day#
Kshirsagar maps the day onto the three Ayurvedic doshas, each ruling a four-hour block that repeats in the evening:
- 1.Kapha, earth and water (6:00 AM - 10:00 AM): A steady, heavier period. He recommends getting up, getting outside and moving early in this window.
- 2.Pitta, fire and water (10:00 AM - 2:00 PM): Digestion (Agni) and concentration are strongest, so he makes lunch the largest meal of the day.
- 3.Vata, air and space (2:00 PM - 6:00 PM): A lighter, more changeable period he suggests for creative work, lighter tasks and exercise.
Meal Timing#
Kshirsagar's advice lines up with a growing body of circadian research:
- Insulin sensitivity tends to be lower in the evening, so the same meal generally raises blood sugar more at 8:00 PM than at noon.
- An early dinner: He recommends finishing eating well before bed, around three hours, so digestion is winding down as you go to sleep.
A large meal close to bedtime keeps your digestive system busy just as your body is trying to cool down for sleep, and many people find it harder to fall asleep. If you have diabetes or take glucose-lowering medication, talk to your doctor before changing when you eat.
How This Connects to ARC#
ARC doesn't plan meals. What it shares with this book is the morning anchor: ARC times about 20 minutes of outdoor light from your real sunrise and runs the timer on your Lock Screen. For the meal-timing side, our circadian fasting guide covers the research, and the free sunlight calculator shows today's sunrise and light window. ARC isn't affiliated with or endorsed by Dr. Kshirsagar; this summary is our own.
ARC isn't affiliated with or endorsed by Dr. Suhas Kshirsagar or the publisher. This summary is our own reading of the book. Educational content, not medical advice.