This study aims to use the Apple Watch health metrics to assess short-term physiological responses in a randomized, double-blind, crossover real-world indoor purification intervention.
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Heart Rate Changes
Timeframe: During each 2-week intervention (real and sham filtration); 1-week washout period is excluded
Daily Resting Heart Rate Changes
Timeframe: During each 2-week intervention (real and sham filtration); 1-week washout period is excluded
Heart Rate Variability Changes
Timeframe: During each 2-week intervention (real and sham filtration); 1-week washout period is excluded
Oxygen Saturation Changes
Timeframe: During each 2-week intervention (real and sham filtration); 1-week washout period is excluded
Sleep Respiratory Rate Changes
Timeframe: During each 2-week intervention (real and sham filtration); 1-week washout period is excluded
Sleep Stages Durations Changes
Timeframe: During each 2-week intervention (real and sham filtration); 1-week washout period is excluded