https://www.selleckchem.com/products/sodium-hydroxide.html This study aimed to determine the influence of intermittent hypoxia and the days required for a worker to be acclimatized in high-altitude countries. We conducted an experimental study. Ten nonsmoking male students were randomly recruited from King Saud University. Fourteen days of exposure to intermittent normobaric hypoxia (15%) was the independent variable. Heart rate (HR), respiratory frequency (RF), minute ventilation (VE), respiratory exchange ratio (RER), tidal volume (VT), oxygen uptake (VO2),VO2/kg, VO2/HR, VE/VO2, and VE/VCO2 were the dependent variables. Our results showed that 12 days of exposure to intermittent hypoxia were sufficient for workers to acclimatize to hypoxia based on their respiratory responses (i.e., HR, RF, VE). This type of acclimatization session is very important for workers who are suddenly required to work in such an environment, because prolonged exposure to high altitude without acclimatization leads to cell death due to a lack of oxygen, and this, in turn, puts workers' lives at risk.The general relationship between weather and climate with recreation and tourism has been widely acknowledged, but research on more activity-specific assessments is still required. The links between atmospheric conditions and visitation to the Nature Park of Cabárceno, an outdoor zoo located in Cantabria (Northern Spain), have been analyzed by conducting in situ surveys and comparing the daily number of attendants and meteorological parameters from a nearby weather station. The sensitivity of zoo visitation to weather variability was seasonally dependent, so winter attendance is directly related to the frequency of dry, warm, calm, and cloudless days; in summer, attendance was less sensitive to weather, with visitors attending in largest numbers during mild, cloudy, and breezy days. Moreover, a dissociation exists between perception and behavior during the period of the largest influx of visi