نوع مقاله : مقاله پژوهشی
نویسندگان
1 دانشجوی کارشناسی ارشد فیزیولوژی ورزشی، دانشکده علوم تربیتی و روانشناسی، دانشگاه شهید مدنی آذربایجان، تبریز، ایران.
2 دانشیار فیزیولوژی ورزشی، دانشکده علوم تربیتی و روانشناسی، دانشگاه شهید مدنی آذربایجان، تبریز، ایران.
چکیده
کلیدواژه‌ها
عنوان مقاله [English]
نویسندگان [English]
Objectives: Cardiovascular disease is highly prevalent among smokers and physically inactive individuals. Heart rate variability (HRV), particularly time-domain measures, is recognized as an indicator of autonomic nervous system function. This study aimed to compare the effects of 12 weeks of moderate-intensity continuous training (MICT) and high-intensity interval training (HIIT) on time-domain HRV indices in young sedentary male smokers.
Methods: This semi-experimental study employed a pre-test–post-test design and included 30 young sedentary male students who smoked at least 5 cigarettes per day and engaged in less than 90 minutes of physical activity per week, as assessed by the IPAQ questionnaire. Participants were randomly assigned to three groups: moderate-intensity continuous training (MICT), high-intensity interval training (HIIT), and control. Training was conducted over 12 weeks, totaling 36 sessions. The MICT group performed treadmill running at 40–65% HRmax for 30–40 minutes. The HIIT group completed interval running cycles consisting of 1-minute bouts at 85–95% HRmax, interspersed with 1-minute active recovery periods at 55–60% HRmax. Training volume was equated between groups in terms of total activity duration and cardiac workload, with intensity monitored using Polar heart rate devices. Resting HRV was measured for 90 minutes using Holter monitoring before and after the intervention. Data were analyzed using ANOVA at a significance level of p < 0.05
Results: Both HIIT and MICT significantly increased time-domain HRV indices, including SDNN, RMSSD, SDANN, and total power (TP), compared to the control group (p < 0.05). Increases in RMSSD, SDNN, and SDANN were significantly greater in the HIIT group compared to the MICT group (p < 0.05), whereas no significant difference was observed between groups for TP.
Conclusion: Both HIIT and MICT improved HRV in young sedentary smokers. Considering the relative advantage of HIIT in some time-domain indices, this training modality may serve as a more effective approach for enhancing cardiac–autonomic function in this population.
کلیدواژه‌ها [English]
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