Most connection and data issues with the Polar H10 are caused by the strap itself, not the Soma app. Common causes include a low battery, other apps competing for the connection, the strap trying to connect to multiple devices, incorrect pairing, or dirty connectors.
Ensure proper skin contact
Poor contact between the skin and the electrodes is the most common cause of inaccurate readings. Moisten the electrodes with water, saliva, or conductive gel before exercise. Tighten the strap so it stays in place and does not move during activity. If the signal is weak, shift the sensor slightly until the reading stabilises. Use conductive gel or shave a small area of the chest if needed for better contact.
Keep the strap clean
Rinse the strap under water after each session and let it air dry. A clean strap maintains better signal quality and lasts longer.
Avoid electromagnetic interference
Strong electromagnetic fields can disrupt heart rate signals. Stay away from high-voltage power lines, electric railways, microwave ovens, and Wi-Fi routers or other 2.4 GHz devices.
Manage static and clothing
Static electricity can cause spikes or dropouts in heart rate data, particularly in dry or windy conditions. Wear a cotton shirt instead of synthetic fabric, moisten the electrodes before use, or dampen a synthetic shirt slightly if that is all that is available.
Check the battery
A low battery reduces transmission range and signal quality. Replace it promptly if you notice irregular data or frequent disconnects.
Quick fixes for erratic readings
Pre-moisten the strap before wearing it, especially in cool or dry conditions. Make sure the fit is snug. Warm up for 5 to 10 minutes before the session to stabilise readings. Avoid areas with wireless congestion or electromagnetic interference.