If you completed a long workout and FITIV is showing a total calorie count of just 1 or 2 calories, there are a few possible causes. The most common one is your resting heart rate setting. This article walks you through that fix and covers other factors that can affect calorie accuracy in FITIV.
How Does FITIV Calculate Calories?
FITIV uses your heart rate data to estimate calorie burn. The calorie formula distinguishes between two types of calories:
- Active calories are burned above your resting baseline, during actual physical effort.
- Resting calories (also called BMR calories) are burned just by being alive, regardless of movement.
To calculate both accurately, FITIV needs to know your resting heart rate. This value sets the baseline the formula works from. If that baseline is off, the entire calorie calculation is affected.
📝 Note: This applies whether you are recording a workout directly in FITIV or syncing data from an external device through Apple Health.
Why Is My Resting Heart Rate Setting the Problem?
FITIV can read your resting heart rate automatically or let you set it manually. If the automatic value is too high, the app interprets most of your heart rate data as being "at rest" rather than "active." As a result, active calories drop to near zero, and total calories appear unrealistically low.
This is a common issue for users with naturally low resting heart rates. If your true resting heart rate is around 45 to 50 bpm but the app has it set to 75 bpm, a heart rate of 60 bpm during a seated session would be read as below baseline, producing a near-zero calorie result.
⚠️ Warning: An incorrect resting heart rate does not just affect one workout. It will skew your calorie data across every workout until it is corrected.
How Do I Check My Resting Heart Rate Setting in FITIV?
To view your current resting heart rate setting:
- Open the FITIV app and tap Profile
- Tap Settings
- Tap Workout Preferences
- Tap Heart Rate Preferences
- Tap Resting HR
Here you will see whether your source is set to Automatic or Manual, and what value the app is currently using.
✅ Success: If your resting heart rate source is set to Automatic and the value looks accurate for you, your calorie data should be reliable. If the number seems high, follow the steps below.
How Do I Fix an Incorrect Resting Heart Rate?
If your resting heart rate is set too high, switch it to manual and enter a more accurate value:
- Go to Profile > Settings > Workout Preferences > Heart Rate Preferences > Resting HR
- Set Source to Manual
- Enter your resting heart rate. If you are unsure, a value between 45 and 55 bpm is a reasonable starting point for most active adults. Adjust based on what you know about your own baseline.
- Save your changes
After updating, complete a test workout and review your calorie totals. They should reflect a more accurate split between resting and active calories.
📝 Note: If you track sleep in FITIV, the app may already have a reliable resting HR reading from your overnight data. Check the Vitals section first to see if that value is available and accurate before switching to manual.
Does This Affect Workouts Synced from External Devices?
Yes. If you use a heart rate monitor like a Polar H10 and sync your workout data through Apple Health, FITIV still applies its own calorie formula to the incoming heart rate data. The resting heart rate setting affects those calculations just as much as it affects workouts recorded directly in FITIV.
The fix is the same: update your resting heart rate under Heart Rate Preferences and re-evaluate your calorie data going forward.
What Else Can Cause Low or Inaccurate Calorie Readings?
Resting heart rate is the most frequent culprit, but a few other factors can also affect calorie accuracy:
- Incomplete biometric profile. FITIV uses your age, weight, and biological sex to calculate calories. If any of these are missing or outdated under your profile settings, your results may be off. Go to Profile > Settings > Personal Info to review and update them.
- Short or low-intensity sessions. For workouts under 10 minutes or sessions with very little heart rate elevation, active calorie values will naturally be close to zero. This is expected behaviour.
- Apple Health sync gaps. If workout data synced from a third-party device arrives incomplete (missing heart rate samples, for example), FITIV has less data to work with and calorie estimates will be less accurate.
- No heart rate data recorded. If your heart rate monitor disconnected mid-workout or failed to pair, FITIV cannot calculate calorie burn accurately. Always confirm your device is connected before starting a session.
If you have checked your resting heart rate setting and calorie readings are still off, work through the points above to identify the issue.
FAQ
Why did FITIV show 2 total calories for a 5-hour workout?
This almost always means the resting heart rate setting in the app is too high. When the baseline is inflated, the calorie formula treats most of your heart rate data as below-threshold, resulting in near-zero active and total calories. Correcting the resting heart rate value will fix this.
Should I use Automatic or Manual for my resting heart rate source?
Automatic works well if FITIV has enough overnight or resting data to build an accurate reading. If you have a naturally low heart rate or have not used the app long enough to generate reliable data, Manual gives you direct control and is often the more accurate option.
Will fixing my resting heart rate correct past workouts?
No. The correction applies to future workouts only. Past workout data will retain the calorie values calculated at the time of recording.
What is a normal resting heart rate?
For most adults, resting heart rate falls between 60 and 100 bpm. Highly active individuals often measure between 40 and 60 bpm. If you are unsure of your number, sitting quietly and counting your pulse for 60 seconds is a reliable way to measure it.
- The FITIV Support Team