Back in 2025, my health was suffering. I weighed about 100 kg, had pre-diabetes, and my sleep was a mess after working a job that kept me up late into the night. My circadian rhythm was completely inverted: I’d eat a full meal right before bed, wake up feeling rocky, drink coffee immediately for a quick boost, and then crash and go back to sleep.
To turn things around, I tried adopting a Huberman-inspired routine to anchor my body clock:
- Taking a morning walk every day for outdoor light (plus occasional sunset walks)
- Delaying caffeine for 90 minutes after waking
- Stopping naps 8–9 hours before bed and hot coffee 8 hours before bed
- Avoid late night snacks 2-3 hours before sleep
- Avoiding bright lights at night once my body entered its "phase delay" window (when bright light pushes your clock later)
The problem wasn't just motivation—it was remembering all of these rules and knowing when they applied. Waking up groggy and in a poor mood made starting hard. In the first few days, I literally just forgot to take my morning walk, and even when I remembered, I didn't know how long I needed to stay outside. On top of that, trying to track a 90-minute caffeine delay, calculate evening cutoffs, or figure out when my circadian phases actually shifted each day was a losing battle.
To make the routine adaptable to real life, I changed three things:
- Making the first step effortless: I started setting out my walking shoes and clothes the night before so they were waiting for me the second I got out of bed.
- Habit stacking with things I enjoy: Instead of treating the routines like chores, I paired them with rewards. I saved my favorite podcast for my morning walks, and before bed, I started stretching while burning lavender incense oil. That made my pre-bedtime routine so relaxing that I actually looked forward to going to bed.
- Offloading the timing and circadian math: To stop relying on memory and guesswork, I coded a simple Proof of Concept (POC) app for myself that calculated my daily phases and nudged me at the right moments (I’ll share more about how it works at the bottom if anyone is interested).
Once those pieces were in place, the habits finally stuck:
- ~3 days in: Better morning mood and noticeably more alertness after walking—a contrast that became obvious on days I skipped it.
- ~2 weeks in: Much better daytime energy and sleep, naturally shifting my bedtime and wake time earlier. My Oura sleep scores, which used to sit around 60–70, now land mostly in the 80s and sometimes 90s.
- ~1 month in: Noticeably less hunger in the morning and throughout the day.
- ~6 months in: I lost about 40 kg (~88 lbs) while keeping my usual 3–4 weekly workouts alongside the new walks.
The science behind why this worked: Fixing my body clock changed both my sleep and my weight because light controls our daily hormones. Morning sunlight triggers a healthy rise in cortisol to wake you up naturally and helps it taper off by bedtime. On the flip side, your eyes get much more sensitive to light after sundown—so bright light during your evening "phase delay" window blocks your sleep hormone (melatonin) and causes nighttime cortisol spikes that keep you wired. When your sleep and cortisol are thrown off, your body cranks up your hunger hormone (ghrelin) and drops your fullness hormone (leptin). Fixing my light timing and cutting out that late-night meal quieted my constant cravings and made eating less feel effortless.
For anyone interested in the POC I built:
Sometimes sticking to a habit is just about getting a gentle nudge at the right time. I built my personal tool around the exact friction points that tripped me up. It calculates your circadian phases so you know when—and how long—to get morning light, using a built-in lux meter to check outdoor brightness while tracking your walk.
To take the mental math out of the rest of the day, it puts a Live Activity right on your Lock Screen that updates as your day unfolds. Instead of memorizing a dozen cutoffs, you get a persistent visual cue for each daily timing window—including when to start or cut off caffeine, when to exercise, when to stop eating, and when to dim the lights and wind down. Once I saw how much it helped me stay consistent, I polished it and released it on iOS as "Rhythm: Better Sleep & Energy".
For those of you stacking multiple habits across the day, what’s your favorite way to pair a difficult habit with something enjoyable so it actually sticks?