| Summary: | 碩士 === 臺北巿立體育學院 === 運動科學研究所 === 99 === Impaired insulin levels (insulin resistance, IR) leads to several
metabolic disorders. Literature revealed that exercise can improve the
insulin sensitivity, but aging and obesity decreases insulin sensitivity.
However, the impact of long-term high intensity training on insulin levels
is unclear in young adults. The present longitudinal study was desiged to
know the changes in metabolic fitness and obesity levels among young
college students. In this study, we observed 143 healthy normal college
students, and 152 athletes, who have been participating in long-term high
intensity training for four years. During the period of four years study, we
found significantly higher values of individuals’height, body weight and
body mass index (BMI) in athletes compared to the normal students.
Higher blood pressure levels in athletes were gradually decreased year by
year during the training, while no change in normal subjects. Although no
difference in fasting blood glucose levels between two groups, insulin
levels and HOMA were significantly (p<.05) higher in athlete group
compared to normal group. This study concludes that long-term high
intensity training can lower insulin sensitivity in athletes compared to
normal students, and no positive effects on metabolic fitness.
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