Abstract

Introduction: High intensity interval training (HIIT) enhances the capacity for fat oxidation and mitochondrial enzyme activity, but the effect of HIIT on plasma adiponectin levels is not yet clear. The aim of this study was to determine the effects of the six week HIIT on resting plasma levels of adiponectin, insulin sensitivity and resistance and fat loss in sedentary young women. Materials and Methods: Twenty two students voluntarily participated in this study and were randomly divided into two groups of experimental and control. The experimental group performed three HIIE sessions per week for 6 weeks. Each session consisted of either four to six repeats of maximal sprint running within a 20 m area with 20–30 sec recovery. Fasting blood samples were collected 24 hours before and after the exercise protocol. Data were analyzed using dependent t-test and paired t-test. Results: Statistical analysis of the data showed that resting adiponectin levels post-intervention in the experimental group significantly increased (p=0.047). Significant improvements (P<0.05) were found in body fat percentage, body mass index (BMI) and waist to hip ratio (WHR) postintervention (experimental group). Conclusion: The findings of present study demonstrated that high-intensity interval training is an appropriate method to reduce body fat and improve anthropometric indices in sedentary young women. Also, the intensity of exercise as an important factor in the increase of adiponectin levels could be noted.

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