On the Mlabri people in whom adolescent growth spurt of height have not been seen

The existence of the“adolescent spurt of growth”of humans has been regarded as self-evident.Height is a representative indicator in the measurement of the human body used to evaluate growth and development. The timing of the “adolescent spurt of height”plays an important role in considering when various aspects of the child's education can best be conducted, including physical training and sex education.However, in the Mlabri people, who had been leading lives of hunting and gathering as they moved through the forests of Thailand and Laos until the end of the 20th century, this“adolescent spurt of height”has not been observed.The reason for this will be clarified by research to be done from now. The evidence to be reported from this research will provide important basic data for physical growth and anthropological studies.