1 Gradually introduce aerobic exercise into your lifestyle. 2  Begin with just five minutes of activity and then slowly build up the length of your workout until you can work out for 30 minutes, 2 to 3 times a week. 3  Always begin any type of exercise with a warm up.
There are many methods for determining hydration status, including monitoring body mass changes, measuring various blood markers, and analysis of urine (urinalysis). An effective and simple way to determine the level of dehydration is to monitor body weight changes.
Rectal temperature. Rectal temperature is said to be the most accurate method for measuring the core temperature (Lefrant et al, 2003). However, obtaining this is more time consuming than other methods and might be considered unfavourable for some patients (Dzarr et al, 2009).