[se]polar | 99% ORIGINAL |

SE=(Total Sleep Time (TST)Total Time in Bed)×100cap S cap E equals open paren the fraction with numerator Total Sleep Time (TST) and denominator Total Time in Bed end-fraction close paren cross 100 Key Research Findings

: In studies involving specific demographics, such as older adults, the Polar Watch is frequently tested alongside competitors like Fitbit and Apple Watch SE to determine which features (e.g., wristband comfort, data visibility) most impact long-term user compliance. [SE]Polar

Recent literature highlights both the utility and limitations of these metrics: SE=(Total Sleep Time (TST)Total Time in Bed)×100cap S