Some factors that might cause higher error percentages in Firstbeat Sports Live data are listed below:
- Artifact tail (i.e. incorrect RR-i values at the end of the data)
- Remove at least one Firstbeat Sports Sensor (from here on described as 'Sports Sensor') pin from the HR strap (from hereon described as 'strap') to help the Sports Sensor automatically stop recording. Or, detach the Sports Sensor completely from the strap.
- Attach the Sports Sensor and rinse the strap after each use. Don't just throw the worn, sweaty strap with the Sports Sensor still attached into a sports bag. Check the maintenance guidance for more info.
- If the Sports Sensor is left attached to the strap, there might be an extra HR artifact tail recorded that can’t be automatically removed. High error % at the end of the recording can increase the average error % which then causes the server to reject the data fully.
- Issues may be caused by:
- Heart rate strap
- Strap and skin are not moist enough for a good signal detection.
- Strap is not snug enough when attached. Check before starting that the strap is tight enough. The strap might loosen while training so try tightening the strap occasionally if possible.
- Strap placement is wrong (e.g., too low). Try moving the strap higher and, where women are concerned, under the sports bra if possible. Check the guidance on how to wear the Sports Sensor for more info.
- Strap is worn out. Like all things, the stray may deplete over over time. When under heavy use, it might wear out sooner. If you need to acquire new straps, you can contact your Firstbeat Sports sales rep.
- Some people have poor electrical conductivity. This is physiological and is very hard to determine.
- Some sport types with lots of arm and upper body movements might be more prone to errors: For example, CrossFit, handball, etc.
- Sensor attachment to strap
- There are athletes with big upper body muscles and/or a “round” chest. For them, the Sports Sensor might more easily detach. We have observed that there are minor differences in how tight the Sports Sensor attachment connection is on different HR straps. If you have problems with the Sports Sensor popping out for specific athletes, you could try to give them a strap that has a tighter attachment.
- Sports Sensor is not properly attached to the HR strap, i.e. it does not snap in properly. Try replacing the strap to check that both of the pins snap in well.
- One of the two pins is loose. Make sure both pins are securely attached
- Sports Sensor is worn upside down i.e. the Firstbeat text is upside down.
- Some (dry) shirts can create lots of electricity. The texture and the material of the shirt can affect this.
- Texture and material of some sports bras can also have the same effect here.
Here is how to debug the high error rate:
- Try using a different HR strap (rules out HR strap as the issue)
- Try with a different Sports Sensor (rules out Sports Sensor as the issue)
- Try to replicate the problem in a different location (i.e. move from gym to outdoors) ⟶ This will help identify/rule out a potential environmental factor causing the problem
If the error percentages remain high despite considering all of the above-mentioned issues, the Sports Sensor might be broken. In this case, please fill in the faulty device form to begin the replacement process.