備考
Whether you choose a wristband tracker, an under-mattress device, or a bedside monitor, the goal is the same: better sleep and a healthier life. While they are not 100% accurate like medical machines, they are reliable enough for daily use.
https://fitnesstrackerforswimmers.com/product/sleep-tracking-device/
1週間調べても分からないことが、先輩なら30秒で解決することもあります
