Capacidade aeróbia de ratos da linhagem wistar: efeito do treinamento físico e do destreinamento físico na meia idade
DOI:
https://doi.org/10.11606/1807-5509201800010085Palavras-chave:
Envelhecimento, Doenças Metabólicas, Máxima Fase Estável de Lactato, Exercícios, Destreinamento, Ratos de Meia-IdadeResumo
Tem sido demonstrado que o engajamento em exercícios físicos regulares gera benefícios para a saúde a curto e a longo prazo, principalmente a redução do risco de doença cardiovascular, mas pouco se sabe sobre o destreinamento físico no processo de envelhecimento. O objetivo do presente estudo foi analisar a capacidade aeróbia, através da máxima fase estável de lactato (MFEL), em ratos Wistar de diferentes idades e em resposta ao treinamento e ao destreinamento físico em ratos de meia-idade. Os resultados foram significativos para o ganho de peso corporal no grupo sedentário (588 ± 71 g) e animais destreinados com 12 meses (576 ± 62 g), enquanto o grupo treinado manteve o peso corpo semelhante aosanimais – PC (515 ± 72 g), do grupo de quatro meses (455 ± 17 g) e seis meses de idade (471 ± 37 g). Como medida da capacidade aeróbia, a MFEL diminuiu com a idade (2 meses sedentários (8,4 ± 1% PC), 4 meses sedentários (6,4 ± 0,6% PC), 6 meses sedentários (5,8 ± 1% PC), 12 meses sedentários (5.1 ± 0,7% PC), mas o exercício físico foi eficaz em atenuar a perda da capacidade aeróbia relacionada com a idade, o grupo 12 meses treinados (5,8 ± 1,3% PC) e o grupo destreinado (5,3 ± 0,4% PC) tiveram resultados semelhante na capacidade aeróbia. O treinamento físico de longo prazo protege contra o aumento do peso corporal e o aumento de depósitos de gordura causada pelo envelhecimento. Porém, este efeito foi abolido pelo destreinametno físico. Além disso, o treinamento físico preveniu a diminuição da capacidade aeróbia, devido ao processo de envelhecimento e este efeito foi mantido após destreinamento físico.
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