Most connection or data issues with the Polar H10 are caused by the strap itself, not the Soma app. These problems usually occur due to one or more of the following:
Low battery in the sensor
Other apps trying to connect to the strap at the same time
The strap attempting to connect with multiple devices
Incorrect pairing or setup
Dirty or worn connectors on the strap
Below are the most common causes and how to fix them.
1. Ensure Proper Skin Contact
Poor contact between the skin and electrodes is the main reason for inaccurate readings.
Try the following:
Moisten the electrodes with water, saliva, or conductive gel before exercise.
Tighten the strap so it stays in place and doesn’t move during activity.
Adjust placement if the signal is weak — shift the sensor slightly until the reading stabilizes.
Use conductive gel or shave a small area of the chest if necessary for better contact.
2. Keep the Strap Clean and Maintained
After each session, rinse the strap under water and let it air dry.
A clean strap maintains better signal quality and lasts longer.
3. Avoid Electromagnetic Interference
Strong electromagnetic fields can disrupt heart rate signals.
Stay clear of:
High-voltage power lines
Electric railways
Microwave ovens
Wi-Fi routers or other 2.4 GHz devices
4. Manage Static and Technical Clothing
Static electricity can cause spikes or dropouts in heart rate data, especially in dry or windy conditions.
To reduce this:
Wear a cotton shirt instead of synthetic fabric.
Moisten the electrodes before use.
Use a tighter shirt or slightly dampen a synthetic one if needed.
5. Check Battery Health
If the battery is running low, transmission range and signal quality will drop.
Replace the battery promptly if you notice irregular data or frequent disconnects.
6. Quick Tips to Eliminate Erratic Readings
Pre-moisten the strap before wearing it, especially in cool or dry conditions.
Secure the fit — ensure it’s snug and doesn’t move.
Warm up for 5–10 minutes before your session to stabilize readings.
Avoid interference zones and wireless congestion.