| Keywords |
Cardiorespiratory fitness ; Adiponectin ; Insulin resistance |
| Abstract |
In this cross-sectional study, we investigate the effects of cardiorespiratory fitness (CRF) and serum adiponectin on the predisposition to insulin resistance syndrome in college male students. Following an overnight fast, body composition and CRF were measured with a standardized protocol. CRF was measured as the maximum volume of minute oxygen consumption during a graded treadmill exercise. Results were presented as means and standard deviations. Bivariate correlations were calculated for measured variables. one-way ANOVA followed by LSD post-hoc tests were used to compare any group differences in the measured variables between subgroups based on CRF and serum adiponectin levels. Pearson correlations showed that serum adiponectin was negatively related to body fatness and insulin resistance such as BMI, percent body fat, waist circumference, insulin, and HOMA-IR, respectively, but positively to cardiorespiratory fitness (CRF). CRF-based subgroup analyses showed significant differences in body fatness, insulin resistance markers, and serum adiponectin in a dose-dependent manner among LOW-, MOD-, and HIGH-CRF subgroups. In particular, the CRF-dependent differences in insulin resistance were found in those with median values of adiponectin. The current findings of the study suggest that both low adiponectin and low CRF levels contribute to clustering of insulin resistance markers, and serum adiponectin level and CRF level on insulin resistance risk factors are complementary to the insulin resistance risk factors in college male students. |