Riding the Second Wind
Like Duolingo, but for Riding the Second Wind. Tomo turns the whole topic into a game you play five minutes a day, until it actually sticks.
For the part of you with thirty open tabs that never became anything.
A short one: 26 levels across 3 sections, about 52 minutes end to end, roughly 10 days at five minutes a day. It moves through Surviving the Afternoon Slump, Decoding the Midnight Energy Rush, and The Science of Your Inner Clock. It starts from scratch.
Free forever · No credit card · iPhone & Android

Key ideas in Riding the Second Wind
- Adenosine is a chemical that builds up in the brain while awake
- Caffeine blocks adenosine receptors but doesn't remove the chemical
- Higher levels of adenosine create a physical pressure to sleep
- Adenosine buildup and pressure
- Adenosine continues to pool behind the caffeine 'blockade'
- Caffeine as a temporary mask
- Caffeine only works as long as it occupies the brain's docking stations
- The biological cause of the 'sleep drunk' sensation
- When caffeine leaves, the accumulated adenosine hits the brain all at once
- Why caffeine is a temporary mask rather than a cure
- The process of the 'caffeine crash' after masking sleepiness
- Short naps clear adenosine without deep sleep
- Longer naps lead to sleep inertia
- The power nap window occurs before deep sleep
- Waking during deep sleep causes reboot failure
- The progression of sleep stages
You've tried the other tabs
Thirty open tabs. Four facts you actually kept.
You watched. You nodded. By Sunday it was gone.
One answer, then back to scrolling.
Eight weeks. You meant to finish. You didn't.
Tomo gives Riding the Second Wind the Duolingo treatment: levels, streaks, and quick quizzes that test what you just learned. That game loop is what the tabs above never had, so it's the one you actually finish.
Here's what playing it feels like
A real question from this course. Take your best guess.
What is the name of the chemical that slowly fills up your brain the longer you stay awake?
Get it right to open this lesson and 25 more in the app.
Where Riding the Second Wind takes you
Ever felt wide awake just as you were about to crash? Discover why your brain tricks you into a sudden energy burst and how to master your internal clock.
- 1
Surviving the Afternoon Slump
- Why You Feel Sleep Drunk
- The Magic of the 20-Minute Nap
- How Light Wakes Up Your Brain
- Snacks That Stop the Crash
- 2
Decoding the Midnight Energy Rush
- When Your Body Ignores Bedtime
- The 'Forbidden Zone' of Sleep
- Why Stress Feels Like Energy
- How to Calm a Racing Mind
- Setting a Better Sleep Rhythm
- Spotting Your Natural Energy Peaks
- 3
The Science of Your Inner Clock
- Meet Your Internal Timekeeper
- How Melatonin Actually Works
- The Chemistry of Being Awake
3 sections · 13 units · 26 levels. Built to play, not to enroll.
You pick the voice
Riding the Second Wind is taught in the Explain Like I'm 5 style: no big words. promise.. Want a different feel? In the app you can spin up the same topic in any of Tomo's teaching styles. Same facts, totally different vibe.
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Start Riding the Second Wind today.
Download Tomo, search Riding the Second Wind, and play your first lesson in under a minute.