Body temperature can be affected by things like extreme physical activity, ovulation and smoking. The temperature cycle is the same between different genders. However, the age does affect the temperature cycle. Studies have shown that older people will sleep tend to wake up more often after they sleep. Older people not only wake at an earlier clock hour, they also wake at an earlier internal phase of the circadian cycle than young people. A normal, healthy person is able to maintain a constant body temperature of approximately 98.6F despite the temperature of the environment and surroundings. Exercising at different times of the day will not affect your body temperature cycle because it will only make your body feel tired and sleep well. There is a correlation between body temperature and concentration, mood and learning. For instance, if the body temperature is not good, the person will get mood swings easily and he or she will not be able to concentrate as well, thus will is unable to learn anything.
Sources:
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http://www.stanford.edu/~dement/temp.html)
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http://www.websciences.org/cftemplate/NAPS/archives/indiv.cfm?ID=19979328)
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http://www.apparelyzed.com/temperature.html)
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http://everything2.com/title/body+temperature)
