Comparação das respostas hormonais ao exercício incremental até exaustão em adolescentes e adultos jovens do sexo masculino

Abstract

Objective: Evaluate hormonal responses to incremental-stage exercise (EX) test to exhaustion in adolescents. Subjects and methods: Adolescents were tested at 16 years of age in Tanner Stage 4 (TS4) and at 17 years of age in Tanner Stage 5 (TS5) (n = 6). Adults were tested at 21 ± 1 y. (X ± SD) (n = 4) and served as controls. Blood samples were taken at rest, at the end of each EX stage. Results: Main effects for EX in cortisol (p < 0.01, increasing with each EX stage) and for subject group for testosterone (T) occurred (p < 0.01; TS4 < TS5, adults). Interaction effect of group by EX stage occurred for GH (p < 0.05). GH increased in response to EX in all groups, however, the magnitude of increase was signifcantly less for TS5 and adults than TS4. Conclusions: Differences in T and GH responses for TS4 than those for TS5 and adults refect the differing maturation levels of the endocrine system between Tanner Stages. TS5 adolescents are more similar to young adults in hormonal responses to EX than are TS4 adolescents. © ABE&M todos os direitos reservados.