That study is nearly ten years old and almost certainly not relevant anymore.
The Basis Peak did a good job at tracking sleep but they got bought up and killed off by Intel for god knows what reason. The Peak also did automatic activity detection and it was quite good at it.
Basis also had hands-down the best visualization of activity and sleep trends, and was the only watch at the time to do full time HRM.
They claimed the Peak watches were a fire risk and recalled them, probably to have a reason to get rid of all the back end infrastructure.
Garmin still can't reliably autodetect biking and its sleep tracking is pretty terrible, too.
The Basis Peak did a good job at tracking sleep but they got bought up and killed off by Intel for god knows what reason. The Peak also did automatic activity detection and it was quite good at it.
Basis also had hands-down the best visualization of activity and sleep trends, and was the only watch at the time to do full time HRM.
They claimed the Peak watches were a fire risk and recalled them, probably to have a reason to get rid of all the back end infrastructure.
Garmin still can't reliably autodetect biking and its sleep tracking is pretty terrible, too.