Abstract
Purpose
The present study was conducted to compare the effects of low volume of high intensity interval training (LVHIIT) and high volume of high intensity interval training (HVHIIT) on heart rate variability (HRV) as a primary outcome measure, and on maximum oxygen consumption (VO2max), body composition, and lower limb muscle strength as secondary outcome measures, in sedentary young women.
Methods
Thirty-six participants were recruited in this study. The LVHIIT group (n = 17) performed one 4-min bout of treadmill running at 85%–95% maximum heart rate (HRmax), followed by 3 min of recovery by running at 70% HRmax, three times per week for 6 weeks. The HVHIIT group (n = 15) performed four times 4-min bouts of treadmill running at 85%–95% HRmax, interspersed with 3-min of recovery by running at 70% HRmax, 3 times per week for 6 weeks. All criterion measures were measured before and after training in both the groups.
Results
Due to attrition of four cases, data of 32 participants was used for analysis. A significant increase in high frequency (HF) power (p < 0.001) and decrease in the ratio of low frequency to high frequency power (LF/HF) ratio (p < 0.001) in HRV parameters, was observed post-HVHIIT, whereas, these variables did not change significantly (HF: p = 0.92, LF/HF ratio: p = 0.52) in LVHIIT group. Nevertheless, both the interventions proved equally effective in improving aerobic capacity (VO2max), body composition, and muscle strength.
Conclusion
The study results suggest that both LVHIIT and HVHIIT are equally effective in improving VO2max, body composition, and muscle strength, in sedentary young women. However, HVHIIT induces parasympathetic dominance as well, as measured by HRV.
Acknowledgments
The authors sincerely thank the participants for their cooperation and support, without which this study would not have been possible.
References
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©2019 Walter de Gruyter GmbH, Berlin/Boston
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Articles in the same Issue
- Editorial
- Clinical diagnostic suspicion: a key component to being a modern Argus in medicine!
- Original Articles
- Ecological perspectives on youth alcohol consumption in the Kuala Lumpur conurbation: a place-based study in Malaysia
- Pubertal assessment: targeted educational intervention for pediatric trainees
- Pediatric providers’ attitudes and practices regarding concussion diagnosis and management
- Pre- and post-exercise electrocardiogram pattern modifications in apparently healthy school adolescents in Cameroon
- Raising awareness on cyber safety: adolescents’ experience of a primary healthcare professional-led, school-based, multi-center intervention
- Comparison of different volumes of high intensity interval training on cardiac autonomic function in sedentary young women
- Rate of teenage pregnancy in Jordan and its impact on maternal and neonatal outcomes
- Metabolic syndrome, leptin-insulin resistance and uric acid: a trinomial foe for Algerian city-dweller adolescents’ health
- Life satisfaction and its relationship with spiritual well-being and religious practice in Iranian adolescent girls
- Subjective social status and its relationship to health and health behavior: comparing two different scales in university students
- Case Report
- Gastric cancer in a teenager: a case report