![]() Interestingly, changes in some HRV parameters were related to changes in PWV. Some measures of HRV and PWV were significantly correlated ( r = 0.275–0.559 p < 0.05).Ĭonclusion: These results show that the LVHIT protocol was more efficient for improving HRV variables and PWV than the HVMIT protocol after 12 weeks of continuous running training. Moreover, a significant decrease in LF and PWV was only observed following the LVHIT protocol ( p < 0.05). ![]() Furthermore, the root mean square of successive RR interval differences (RMSSD) significantly increased only in the LVHIT ( p < 0.05). Whereas the low-frequency (LF)-HF ratio decreased significantly in both training protocols ( p < 0.05) however, these changes were significantly greater in the LVHIT protocol ( p < 0.05). ![]() Results: Both protocols (i.e., HVMIT and LVHIT) significantly increased the SD of normal sinus beat intervals (SDNN) and high-frequency (HF) bands ( p < 0.05) after 12 weeks. HRV, pulse wave velocity (PWV), hemodynamic variables, and body composition were measured before and after 12 weeks. Both training protocols were equated by caloric expenditure. The HVMIT group ran three times per week on a treadmill at 50–60% of VO 2max for 45–60 min, while the LVHIT trained at 70–85% of VO 2max for 25–40 min. ![]() Materials and Methods: Notably, 45 males (age: 42 ± 5.7 years) were randomly assigned to a control ( n = 15), HVMIT ( n = 15), or LVHIT ( n = 15). This study investigates the chronic effects of high-volume moderate-intensity training (HVMIT) and low-volume high-intensity training (LVHIT) on heart rate variability (HRV) and AS in sedentary adult men. However, it is not clear that which exercise training variables, intensity or volume, or both, play a crucial role in this regard. 14Institut International des Sciences du Sport (2I2S), Irodouer, Franceīackground: It is well known that exercise training has positive effects on both cardiac autonomic function and arterial stiffness (AS).13Laboratoire Mouvement, Sport, Santé – EA 1274, University of Rennes, Rennes, France.12Department of Exercise Science and Sport Management, Kennesaw State University, Kennesaw, GA, United States.11Faculty of Sport Sciences, Atatürk University, Erzurum, Turkey.10Department of Physical Education, Islamic Azad University, Tehran, Iran.9Institute of Primary Care, University of Zūrich, Zurich, Switzerland.7Department of Physical Education and Sport Sciences, University of Kurdistan, Sanandaj, Iran.6Faculty of Kinesiology, University of Calgary, Calgary, AB, Canada. ![]()
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