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Your body, explained through science.

Everything the bracelet measures, day and night, explained in plain language with links to research.

Diary 3 min Food logging in tri: photos, portions and your daily goal Add food with a photo, clarify ingredients and portions, and check daily calories and macros.
AI 2 min What to ask your AI assistant Use your own words to understand your night, log food, correct your diary or set an alarm.
AI 2 min What your AI assistant remembers Useful context, familiar foods and memory settings. What you can change or delete.
AI 2 min How AI explains your metrics Your history, diary context and scientific foundations. What goes into an explanation.
AI 2 min Choose your assistant’s personality Different communication styles for the same question. Find the one that suits you.
Health 6 min What is biological age? How tri expresses lifestyle patterns in years, and why the estimate can move in either direction.
Widgets 3 min VO2Max: your engine's power reserve How much oxygen your engine can pull at full throttle — and why this number predicts health better than most lab work.
Basics 3 min The calibration week: what is happening In the first days the band is learning: collecting your personal baselines for HRV, resting heart rate and load. What works right away, what takes a week, and how to help.
Widgets 3 min When you should turn in Not “before midnight”, but a time worked out from your wake-up, your sleep baseline and the sleep you missed over recent nights.
Widgets 3 min How the band spots illness before you do Four night readings, a personal corridor instead of a general table, and why only a coincidence counts as a signal.
Widgets 3 min Should you train today Three things the answer is built from: recovery, the jump in weekly load, and the daily cap.
Widgets 3 min Why coffee has a deadline A six-hour half-life, eight hours of margin before bed, and what an evening cup actually breaks.
Diary 3 min Where “affects your recovery” comes from How tri works out the effect of habits from your own data — and why it is a hint, not a verdict.
Diary 2 min Rating the day: what the wellbeing scale shows Why rate how you feel, and why a mismatch with the numbers is a signal in itself.
Diary 3 min How late food and caffeine affect your sleep Coffee, a late dinner and alcohol hit sleep harder than you would think — and it shows in your recovery.
Diary 3 min Why log your habits every day From short check-ins tri works out what helps you recover and what gets in the way.
Basics 3 min Levels and coins: how your progress grows You earn coins for movement, regularity and journal notes, and grow through levels — gently, without a race.
Basics 2 min Sleep schedule: why the body loves order Your body clock loves order: going to bed and getting up at the same time matters more than the occasional long lie-in.
Basics 2 min Active minutes: not any movement, but the kind that makes the heart work Why twenty brisk minutes give the body more than an hour of gentle walking — and how much you actually need.
Basics 2 min Resting heart rate: the quiet indicator of your fitness The calmest beat of your heart tells the truth about fitness and recovery — learn to read its trend.
Basics 3 min Stress: how the band sees your tension How tri notices stress from your pulse, why it can be useful or harmful, and what helps you exhale.
Basics 3 min HRV: the quiet signal that shows whether you have recovered At night the heart shows itself honestly: what HRV is and why it is your main recovery signal.
Basics 3 min Skin temperature at night: what it tells you about yourself The tri band catches not degrees but deviations from your own baseline — and often spots a cold before you do.
Basics 2 min How tri notices your workouts The band spots load from your heart rate and offers to save the workout — you just confirm it and pick the type.
Basics 3 min Blood oxygen: a calm night-time baseline What blood oxygen saturation is, why 95–100% is normal, and why a single night-time dip is often just cold hands.
Basics 2 min How tri knows how much you burned Why tri counts calories from heart rate and workout type rather than steps — and why your numbers differ from a friend's.
Basics 2 min Heart rate: what your heart is telling you Heart rate is the body's most honest signal about load and fatigue: the zones, and when it is worth listening to yourself.
Basics 2 min How the band knows how far you walked The band does not measure kilometres directly — it counts steps and multiplies by your stride length. Why your profile matters here.
Basics 3 min Forget the 10,000 steps The round 10,000 came from advertising, not science. How many steps you actually need, and why the band sometimes counts extra.
Basics 4 min Load — how much you spent today What load is, the 0–21 scale, and the balance with recovery.
Basics 4 min Recovery — are you ready for load What recovery is, what it is built from, and how to influence it.
Basics 4 min Sleep — the foundation everything else rests on What sleep is, which readings we take, the stages, and sleep debt.