The effect of six weeks of high-intensity interval training in hot temperature on insulin resistance index and serum leptin in obese men

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Document Type : Research Paper I Open Access I Released under (CC BY-NC 4.0) license

Authors

1 Ahmad Shahsavari. Department of sport science, Borujerd Branch, Islamic Azad university, Borujerd, Iran.

2 , Department of Physical Education and Sports, Faculty of Humanities, Ayatollah Borujerdi University, Borujerd, Iran.

3 Associate professor of sport science faculty, Razi university, Kermanshah, Iran.

Abstract

Aim:       Environmental temperature and exercise are factors that affect body weight regulation. The aim of this study was to investigate the effect of six weeks of high-intensity interval training in hot temperature on insulin resistance index and serum leptin in obese men. Methods: The present study was a quasi-experimental study with a pre-test and post-test design. 32 young obese men were divided into 4 equal groups; Group 1: training at 22°C (TR22), Group 2: training at 36°C (TR36), Group 3: resting at 22°C (C22), and Group 4: resting at 36°C (C36). The TR36 and TR22 groups performed high-intensity interval training three days a week for 6 weeks at an intensity of 80-85% of heart rate reserve at two different temperatures. In two stages, before and after the intervention, leptin, insulin, serum glucose, and anthropometric indices of the subjects were measured. Statistical analysis of the research data was analyzed using one-way analysis of variance, Tukey's post hoc test, and Pearson's correlation coefficient. Results: The results of the present study showed that 6 weeks of interval training in hot temperature a significant decrease in the variables leptin (P = 0.001), insulin (P = 0.001), glucose (P = 0.001), weight (P = 0.001), and body fat percentage (P = 0.001) in the subjects of the TR36 group compared to the control group (C36 group). Also, a direct and significant relationship was observed between changes in body fat percentage in the TR36 group with leptin (TR36 P = 0.031) and insulin (TR36 P = 0.039) concentrations. Conclusion: Performing interval training in hot temperature, unlike normal temperature, reduces leptin, insulin, glucose, fat percentage, and body weight levels in obese individuals. It also seems that the decrease in leptin and insulin levels is related to changes in fat percentage.

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References

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Journal of Applied Health Studies in Sport Physiology

Articles in Press, Accepted Manuscript
Available Online from 22 January 2025

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History

  • Receive Date: 22 November 2024
  • Revise Date: 20 January 2025
  • Accept Date: 21 January 2025

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