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Article

Effects of high-intensity interval versus continuous moderate‑intensity aerobic exercise on apoptosis, oxidative stress and metabolism of the infarcted myocardium in a rat model

  • Authors:
    • Kai Lu
    • Li Wang
    • Changying Wang
    • Yuan Yang
    • Dayi Hu
    • Rongjing Ding
  • View Affiliations / Copyright

    Affiliations: Heart Center, Peking University People's Hospital, Beijing 100044, P.R. China, Department of Cardiology, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, P.R. China
  • Pages: 2374-2382
    |
    Published online on: April 23, 2015
       https://doi.org/10.3892/mmr.2015.3669
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Abstract

The optimal aerobic exercise training (AET) protocol for patients following myocardial infarction (MI) has remained under debate. The present study therefore aimed to compare the effects of continuous moderate‑intensity training (CMT) and high‑intensity interval training (HIT) on cardiac functional recovery, and to investigate the potential associated mechanisms in a post‑MI rat model. Female Sprague Dawley rats (8‑10 weeks old) undergoing MI or sham surgery were subsequently submitted to CMT or HIT, or kept sedentary for eight weeks. Prior to and following AET, echocardiographic parameters and exercise capacity of the rats were measured. Western blotting was used to evaluate the levels of apoptosis and associated signaling pathway protein expression. The concentrations of biomarkers of oxidative stress were also determined by ELISA assay. Messenger (m)RNA levels and activity of the key enzymes for glycolysis and fatty acid oxidation, as well as the rate of adenosine triphosphate (ATP) synthesis, were also measured. Compared with the MI group, exercise capacity and cardiac function were significantly improved following AET, particularly following HIT. Left ventricular ejection fraction and fraction shortening were further improved in the MI‑HIT group in comparison to that of the MI‑CMT group. The two forms of AET almost equally attenuated apoptosis of the post‑infarction myocardium. CMT and HIT also alleviated oxidative stress by decreasing the concentration of malondialdehyde and increasing the concentration of superoxide dismutase and glutathione peroxidase (GPx). In particular, HIT induced a greater increase in the concentration of GPx than that of CMT. AET, and HIT in particular, significantly increased the levels of mRNA and the maximal activity of phosphofructokinase‑1 and carnitine palmitoyl transferase‑1, as well as the maximal ratio of ATP synthesis. In addition, compared with the MI group, the expression of signaling proteins PI3K, Akt, p38mapk and AMPK was significantly altered in the MI‑CMT and MI‑HIT groups. HIT was superior to CMT in its ability to improve cardiac function and exercise capability in a post‑MI rat model. HIT was also superior to CMT with regard to attenuating oxidative stress and improving glucolipid metabolism of the post‑MI myocardium.
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Copy and paste a formatted citation
Spandidos Publications style
Lu K, Wang L, Wang C, Yang Y, Hu D and Ding R: Effects of high-intensity interval versus continuous moderate‑intensity aerobic exercise on apoptosis, oxidative stress and metabolism of the infarcted myocardium in a rat model. Mol Med Rep 12: 2374-2382, 2015.
APA
Lu, K., Wang, L., Wang, C., Yang, Y., Hu, D., & Ding, R. (2015). Effects of high-intensity interval versus continuous moderate‑intensity aerobic exercise on apoptosis, oxidative stress and metabolism of the infarcted myocardium in a rat model. Molecular Medicine Reports, 12, 2374-2382. https://doi.org/10.3892/mmr.2015.3669
MLA
Lu, K., Wang, L., Wang, C., Yang, Y., Hu, D., Ding, R."Effects of high-intensity interval versus continuous moderate‑intensity aerobic exercise on apoptosis, oxidative stress and metabolism of the infarcted myocardium in a rat model". Molecular Medicine Reports 12.2 (2015): 2374-2382.
Chicago
Lu, K., Wang, L., Wang, C., Yang, Y., Hu, D., Ding, R."Effects of high-intensity interval versus continuous moderate‑intensity aerobic exercise on apoptosis, oxidative stress and metabolism of the infarcted myocardium in a rat model". Molecular Medicine Reports 12, no. 2 (2015): 2374-2382. https://doi.org/10.3892/mmr.2015.3669
Copy and paste a formatted citation
x
Spandidos Publications style
Lu K, Wang L, Wang C, Yang Y, Hu D and Ding R: Effects of high-intensity interval versus continuous moderate‑intensity aerobic exercise on apoptosis, oxidative stress and metabolism of the infarcted myocardium in a rat model. Mol Med Rep 12: 2374-2382, 2015.
APA
Lu, K., Wang, L., Wang, C., Yang, Y., Hu, D., & Ding, R. (2015). Effects of high-intensity interval versus continuous moderate‑intensity aerobic exercise on apoptosis, oxidative stress and metabolism of the infarcted myocardium in a rat model. Molecular Medicine Reports, 12, 2374-2382. https://doi.org/10.3892/mmr.2015.3669
MLA
Lu, K., Wang, L., Wang, C., Yang, Y., Hu, D., Ding, R."Effects of high-intensity interval versus continuous moderate‑intensity aerobic exercise on apoptosis, oxidative stress and metabolism of the infarcted myocardium in a rat model". Molecular Medicine Reports 12.2 (2015): 2374-2382.
Chicago
Lu, K., Wang, L., Wang, C., Yang, Y., Hu, D., Ding, R."Effects of high-intensity interval versus continuous moderate‑intensity aerobic exercise on apoptosis, oxidative stress and metabolism of the infarcted myocardium in a rat model". Molecular Medicine Reports 12, no. 2 (2015): 2374-2382. https://doi.org/10.3892/mmr.2015.3669
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