Ultradian rhythms
Ultradian rhythm: the wave beneath your day
The ultradian rhythm lives inside your day — every 90 minutes, your body moves through a peak of focus and then asks for a dip. When you listen to that wave instead of fighting it, everything softens.
One 90-minute cycle
Each wave moves through five phases. None of them are laziness — they're your body doing exactly what it should.
0–15 min
Ramp-up
Your nervous system is easing in. Start with gentler tasks before you ask more of yourself.
15–60 min
Peak focus
You feel sharp, creative, capable. Protect this window for the work that matters most to you.
60–75 min
Plateau
The edge softens a little. A good moment to finish something, not to start a new mountain.
75–85 min
Transition
Attention drifts, small mistakes creep in, you may feel foggy. This is the dip — your body asking for a pause, not a sign you're failing.
85–90 min
Recovery
Twenty minutes of something different — movement, daylight, a sip of water, a look at the sky. You're not wasting time; you're healing.
Your rhythm is bio-individual
There is no "right" length. One of these patterns probably feels closer to home — read through them, then take the quiz.
45m / 15m
Sprinter
You come alive in short, intense bursts. Stacking 45-minute sprints with real 15-minute pauses keeps you sharp without running you down.
1h 15m / 15m
Classic 90
Your body lives close to the textbook cycle. Seventy-five minutes of focus and a true 15-minute break fit you almost perfectly.
1h 40m / 20m
Marathoner
You settle in slowly and ride long waves. Protect 100-minute deep sessions and give yourself generous 20-minute breaks — that's where you do your best work.
Discover your rhythm
Four quick questions to see whether you ride short sprints, classic 90-minute waves, or longer, slower ones.
1 / 4
How long can you focus before your mind naturally wanders?
Small shifts, big life
Honouring your rhythm isn't another system — it's a handful of small, honest changes.
Work in waves, not marathons
Shape your calendar around 60-to-90-minute blocks instead of open-ended hours. Finishing on a natural high feels kinder than grinding past it.
Honour the dip
When focus blurs and you start re-reading the same line, that's the signal — not a weakness. Step away for 10 to 20 minutes and come back to yourself.
The key is the change
If you've been sitting, stand. If you've been on a screen, look at the sky. A short walk, a stretch, a glass of water — change the input and your body will thank you.
Breathe before the next wave
Two or three minutes of slow nasal breathing between blocks settles your nervous system and sharpens what comes next.
Frequently asked questions
- What is the ultradian rhythm?
- It's the natural energy and attention cycle that repeats roughly every 90 minutes across your day. After each block of deep focus, your body asks for about 20 minutes of real rest to recharge.
- How do you work with the ultradian rhythm?
- Work in 90-minute blocks without interruption, then step away for 20 minutes — a short walk, water, slow breathing, away from screens. Repeating this cycle three or four times a day keeps your energy steady without burning you out.
- How long is an ultradian cycle?
- About 90 minutes of sustained focus, followed by roughly 20 minutes where the body asks to slow down. It isn't exact for everyone: the idea is to notice your own wave, not to time it to the minute.
- How many ultradian cycles are there in a day?
- Across your waking hours you move through roughly four to six. You don't need to fill them all with work; alternating focus with real rest is what keeps your energy steady into the evening.
- How is it different from the circadian rhythm?
- The circadian rhythm is the 24-hour cycle that governs sleep and wakefulness; the ultradian is the shorter 90-minute wave inside the day. One shapes the whole day, the other each block.
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Want to stop pushing through your day?
If you're ready to stop pushing through and start partnering with your rhythms, I'd be honoured to walk that with you.
Coaching, not medical care. For diagnosis or treatment, please see a qualified clinician.