There is no need to recalibrate each training session.
In August 2016, we released a Firmware update (version 1.1.7) which enables you to save your UPRIGHT's calibration. This setting can be turned on or off in the SETTINGS section of the UPRIGHT app depending on your personal preference (see below).
When changing locations of UPRIGHT on your back between upper back and lower back, it is necessary to recalibrate the device. Otherwise, just place it on your back and start training!
How to recalibrate on iOS devices:
If at any time you feel like your UPRIGHT needs to be recalibrated, open the sensitivity slider and then press RECALIBRATE.
How to recalibrate on Android devices:
You can recalibrate your UPRIGHT following the instructional video below: