Why the study?
Although high-intensity interval training enhances cardiovascular health, research investigating the specific cardiovascular effects of different HIIT training modes was lacking.
Does resistance-type high-intensity interval training compared to cycling-type high-intensity interval training improve arterial stiffness, cardiac autonomic modulation, and cardiac biomarkers in healthy young men?
Does resistance-type high-intensity interval training compared to cycling-type high-intensity interval training improve arterial stiffness, cardiac autonomic modulation, and cardiac biomarkers in healthy young men?
Both resistance and cycling HIIT elicit similar acute cardiac biomarker and autonomic responses, but resistance HIIT is more effective at acutely reducing arterial stiffness in healthy young men.
R-HIIT may reduce arterial stiffness more than C-HIIT acutely in healthy young men; leaves open effects in patients or with chronic training.
Background: High-intensity interval training (HIIT) has been shown to enhance cardiovascular health. However, there is a lack of research investigating the specific cardiovascular effects of different HIIT training modes. Therefore, the purpose of this study was to compare the acute effects of cycling-type high intensity interval training (C-HIIT) and resistance-type high intensity interval training (R-HIIT) on arterial stiffness, cardiac autonomic modulationand cardiac biomarkers in healthy young men. Methods: Eleven healthy active young men (ages: 21.36±2.46 years) randomly took part in both C-HIIT and R-HIIT. Cardio-ankle vascular index (CAVI), heart rate variability (HRV), blood pressure (BP) was measured at before, immediately and 30 min after the exercise in C-HIIT and R-HIIT. Meanwhile, blood samples for cardiac troponin-T (cTnT) and amino-terminal pro-B-type natriuretic peptide (NT-proBNP)were assessed using ELISA at the same time points. Results: R-HIIT resulted a more significant reduction in ⊿CAVI compared to C-HIIT ( P <0.05) at immediately after exercise. Both C-HIIT and R-HIIT lead to significantly higher SBP value than the baseline immediately after exercise ( P <0.05). All HRV indices, including lnRMSSD and lnHF, decreased immediately ( P <0.001) and 30 minutes ( P <0.05) after exercise, while the LF/HF ratio increased immediately and returned to baseline after 30 minutes ( P >0.05) of exercise. The cTnT and NT-proBNP levels were significantly higher than the baseline 5 minutes after exercise ( P <0.05) and returned to the baseline at 35 minutes after exercise ( P >0.05). Trial registration: The study was prospectively registered on 27 August 2021 at www.chictr.org.cn with identification number ChiCTR2200056897. Conclusion: Both R-HIIT and C-HIIT elicited similar acute responses in cardiac autonomic modulation and cardiac biomarkers. However, R-HIIT was found be more effective in reducing arterial stiffness in healthy young men. Furthermore, the increase in cardiac biomarkers induced by both C-HIIT and R-HIIT was reversible and did not result in pathological changes in the myocardium.
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Wang et al. (2023) studied this question.
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