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Related Experiment Video

Updated: Sep 4, 2025

A Chronic High-Intensity Interval Training and Diet-Induced Obesity Model to Maximize Exercise Effort and Induce Physiologic Changes in Rats
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A Chronic High-Intensity Interval Training and Diet-Induced Obesity Model to Maximize Exercise Effort and Induce Physiologic Changes in Rats

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High-Intensity Interval Training Improves Cardiac Function by miR-206 Dependent HSP60 Induction in Diabetic Rats.

Maryam Delfan1, Raheleh Amadeh Juybari1, Sattar Gorgani-Firuzjaee2

  • 1Department of Exercise Physiology, Faculty of Sport Sciences, Alzahra University, Tehran, Iran.

Frontiers in Cardiovascular Medicine
|July 18, 2022
PubMed
Summary

High-intensity interval training (HIIT) and moderate-intensity continuous training (MICT) improve cardiac function in diabetic rats. HIIT demonstrated superior efficacy in reducing apoptotic markers and modulating miR-206 expression compared to MICT.

Keywords:
apoptosiscardiomyopathydiabetesexercisemiRNAs

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Area of Science:

  • Cardiovascular Physiology
  • Molecular Biology
  • Exercise Science

Background:

  • Diabetic cardiomyopathy is a significant complication of diabetes mellitus.
  • MicroRNAs play crucial roles in both normal physiological and pathological processes.
  • Exercise interventions are explored for their potential to mitigate diabetic cardiomyopathy.

Purpose of the Study:

  • To investigate the effects of high-intensity interval training (HIIT) and moderate-intensity continuous training (MICT) on molecular markers of diabetic cardiomyopathy in a rat model.
  • To compare the efficacy of HIIT versus MICT in improving cardiac function and altering specific molecular pathways.

Main Methods:

  • Streptozotocin-induced type 1 diabetes mellitus was established in male Wistar rats.
  • Rats were randomly assigned to control, MICT, or HIIT groups for 5 weeks.
  • Cardiac performance, miR-206 expression, HSP60 levels, and apoptosis markers (cleaved PARP, cytochrome C) were assessed.

Main Results:

  • Both HIIT and MICT improved cardiac performance and reduced blood glucose levels, with greater improvements in the HIIT group.
  • Both training protocols decreased miR-206 and apoptotic marker expression, with HIIT showing more pronounced reductions.
  • Both exercise interventions increased HSP60 expression, with a significantly larger increase observed in the HIIT group.

Conclusions:

  • Both HIIT and MICT can ameliorate diabetic cardiomyopathy by modulating miR-206 expression and downstream apoptotic targets.
  • HIIT appears to be more effective than MICT in modulating these molecular markers and improving cardiac outcomes in diabetic rats.