Mens Long Hairstyles Biography
Hair length is measured (in centimeters or inches) from the line of the scalp on the forehead up over the highest point of the skull to its termination. In cosmetology, hair lengths are usually categorized according to the part of the body where the bulk of the longest hair terminates: chin level, shoulder length, mid-back level, waist length, hip-length, classic length (extends to almost upper thigh-length, where the legs meet the buttocks), thigh-length, knee-length and ankle/floor length hair.Hair usually takes about two years to reach shoulder length,and at approximately 80–90 cm (32–36 inches) for most people, waist-length hair usually takes about seven years to grow, including occasional trims.The maximum hair length that is possible to reach is about 15 cm (6 in) for infants (below the age of 1), about 60 cm (24 in) for children (under the age of 13), and generally 100 cm (40 in) for adults. Documentation for decrease of the maximum length with age cannot be found in the literature. Some individuals can reach excessive lengths. Lengths greater than 150 cm (59 in) are frequently observed in long hair contests. Xie Qiuping had the longest documented hair in the world, measuring 5.627 m (18 ft 5.54 in) in May 2004.The maximum terminal hair length depends on the length of the anagen (period of hair growth) for the individual. Waist-length hair or longer is only possible to reach for people with long anagen. The anagen lasts between 2 and 7 years, for some individuals even longer, and follows by shorter catagen (transition) and telogen (resting) periods. Between 85% and 90% of the hair strains are in anagen.Anthropologists speculate that the functional significance of long head hair may be adornment, a by-product of secondary natural selection once other androgenic/somatic hair (body hair) had largely been lost. Another possibility is that long head hair is a result of Fisherian runaway sexual selection, where long lustrous hair is a visible marker for a healthy individual. For some groups or individuals, however, short hair is the selected trait.By seven to nine months, infants can tell the sexes apart based on hair length, voice pitch and faces.Hair is one of the most important ways humans have of presenting themselves, being one of the parts of their body which is easiest to manipulate. Also, males having short, cut hair (or a shaven head) is often viewed as being under society's control, such as while in military service or prison or as punishment for a crime, while males having long hair signifies being outside of the mainstream.