Accurate estimation Antioxidant Enzymes Article Atmospheric pressure Azotobacter COSMED K5 Controlled environment Cost benefit analysis Cost estimating Electrocardiography Energy expenditure Environmental sensor Exercise Humans Licorice Population Machine learning models Mechanical process Metabolic systems Oxygen Oxygen Consumption Oxygen uptake Plant Growth-Promoting Rhizobacteria Salt Stress Seismocardiogram Seismocardiography Sporting goods Vanadium dioxide Walking Wearable Electronic Devices Wearable sensors