| Autor: |
Caldwell AE; Department of Medicine, Division of Endocrinology, Metabolism and Diabetes, University of Colorado Anschutz Medical Campus, Aurora, CO, USA., Cummings DK; Economic Science Institute, Chapman University, Orange, CA, USA., Hooper PL; Economic Science Institute, Chapman University, Orange, CA, USA.; Department of Anthropology, University of New Mexico, Albuquerque, NM, USA., Trumble BC; Center for Evolution and Medicine, Arizona State University, Tempe, AZ, USA.; School of Human Evolution and Social Change, Arizona State University, Tempe, AZ, USA., Gurven M; Department of Anthropology, University of California Santa Barbara, Santa Barbara, CA, USA., Stieglitz J; Institute for Advanced Study in Toulouse, Université Toulouse 1 Capitole Toulouse, France., Davis HE; School of Human Evolution and Social Change, Arizona State University, Tempe, AZ, USA.; Department of Anthropology, Harvard University, Boston, MA, USA., Kaplan H; Economic Science Institute, Chapman University, Orange, CA, USA. |
| Abstrakt: |
Over 80% of adolescents worldwide are insufficiently active, posing massive public health and economic challenges. Declining physical activity (PA) and sex differences in PA consistently accompany transitions from childhood to adulthood in post-industrialized populations and are attributed to psychosocial and environmental factors. An overarching evolutionary theoretical framework and data from pre-industrialized populations are lacking. This cross-sectional study tests hypotheses from life history theory, that adolescent PA is inversely related to age, but this association is mediated by Tanner stage, reflecting higher and sex-specific energetic demands for growth and reproductive maturation. Detailed measures of PA and pubertal maturation are assessed among Tsimane forager-farmers (age: 7-22 years; 50% female, n = 110). Most Tsimane sampled (71%) meet World Health Organization PA guidelines (greater than or equal to 60 min/day of moderate-to-vigorous PA). Like post-industrialized populations, sex differences and inverse age-activity associations were observed. Tanner stage significantly mediated age-activity associations. Adolescence presents difficulties to PA engagement that warrant further consideration in PA intervention approaches to improve public health. |
