Titan builds Exertion from the workouts in Apple Health and the heart rate recorded during them. A workout that never reached Health counts for nothing, and one with no heart rate counts only by its length. Work through these checks in order. To open Settings, tap your avatar on Today, then tap the gear on You.
011. Check the workout is in Apple Health
Open the Health app and confirm the session is listed. Titan reads workouts only from Health. It watches Health for new workouts and refreshes shortly after one arrives. Titan counts a workout on the day it started, so a session that ran past midnight belongs to the earlier day.
022. Check Health access
Settings > Health & Connected Apps > Health Permissions opens iOS Settings for Titan. Turn on Workouts and Heart Rate. Health permissions lists every type Titan reads.
033. Check your workout sources
Go to Settings > Health & Connected Apps and tap Workouts in the Apple Health section. If the recording app is off under Allowed Sources, Titan skips it. Tap Reset to All Sources to let Titan read every source again. Check the Heart Rate row the same way, since zone time comes from heart rate.
044. Check the workout has heart rate
Titan counts heart rate zone time only inside recorded workouts. Each minute in zone 1 adds 1 load point, and each minute in zone 5 adds 5. Heart rate recorded outside a workout does not add to Exertion.
A workout without heart rate still counts. Titan falls back to duration, and each minute counts once, scaled by activity type.
| Activity type | Load per minute |
|---|---|
| Run, walk, cycle, swim, row, hike, elliptical, stairs | 1.0 |
| HIIT | 0.95 |
| Strength and cross training | 0.9 |
| Yoga and mind and body | 0.65 |
| Other with distance | 0.95 |
| Other | 0.8 |
| Other renamed to a sauna or steam label | 0.5 |
Exertion equals 10 times one minus e to the power of negative load over 100. A 60 minute run with no heart rate gives 60 load points and an Exertion of 4.5. The same run spent entirely in zone 3 gives 180 points and an Exertion of 8.3.
Watch-based workouts covers recording sessions with heart rate.
055. Clear the Exertion cache
Titan reuses a day's zone totals for up to 30 minutes, so late heart rate can take that long to count. For older days, go to Settings > Health & Connected Apps and tap Clear Exertion Cache under Targeted Clears. Titan recalculates Exertion, Training Load and Sleep Debt from Apple Health. The rebuild covers 60 to 150 days, based on Number of Workouts under Training Load on Your Training. At the default of 3,000 workouts it covers 150 days.
A missing record does not mean you did zero work. Titan scores only what Health recorded. If a workout still does not appear, send details through the contact page.
