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Exceptional height is usually due to gigantism or dwarfism. Adult height for one sex in a particular ethnic group follows more or less a Gaussian distribution or bell curve, although with some individuals lying several standard deviations away from the mean. Height or tallness is determined by the interaction of genes and environment. Final adult height may be attained anywhere from the early teens to early 20s, although it is most commonly reached during the mid teens for females and late teens for males. A person’s height also varies over the course of the day, by an average of 19 mm gradually shrinking, as the spine compresses over the course of a day, and stretching back out overnight. Many young people are concerned if they are too short or too tall for their age, so it would be nice to know more about human normal average height.
Changes in human height
Human height is regulated by many factors we could explain. Since the development of modern medicine and plentiful nutrient-rich food in the developed world average height has increased dramatically during last years. Nutrition is the most important factor in determining height. Height records from military records and other documents can be used to quite accurately compare nutrition and height in various eras. Evidence has shown that height decreased in Britain in the early nineteenth century, before beginning its long increase around mid-century, but increase in height has not been constant. The European Middle Ages was an era of tallness with men of above six feet, which is 1.83 m was considered unremarkable. In Europe human height reached its nadir at the start of the 19th century. Until the general rise in human health the accompanying trend was a height decline. Europeans in North America were far taller than those in Europe in the eighteenth and nineteenth centuries. In fact they were the tallest in the world. The original indigenous population was also among the tallest populations of the world at the time, but several nations, indeed many nations in Europe, have now surpassed the US in terms of average stature. It was particularly the Netherlands and Scandinavian nations. The most markedly is the Netherlands where average height has increased at the greatest rates. For instance: the Netherlands was in the late nineteenth century a land renowned for its short population. However, today it has the tallest average in the world with young men averaging 1.83 m tall. The Dutch are now well known in Europe for extreme tallness, and increase has been so dramatic that various things have been redesigned to fit the much taller frames. In contrast, average male height in impoverished Vietnam and North Korea remains comparatively small at 5 ft 4 in, or 1.63 m, and 5 ft 5 in, or 1.65 m respectively. Currently, young North Korean males are actually significantly shorter, so this contrasts greatly with the extreme growth occurring in surrounding Asian populations with correlated increasing standards of living.