Skin Temperature Gradient Effects on the Variation of Metabolic Hormones in Adults

The mountainous setting is characterized by lower temperatures (about 8-10C ambient air temp.) than those in urban setting, also having \>800m altitude.Each period will last for 1 week with a wash out period of minimum 2 days. Continuous skin temperature and ambient temperature monitoring will take place in the last day of each period, towards the end. During the 2 sampling days, 24-hour urine voids will be collected in different vials. Participants will be required to fulfill a diary with their daily activities, meal times, collection of urine times, sleep/wake times and times of leaving/entering a closed environment.