Next Article in Journal
Shared Decision-Making and Women’s Adherence to Breast and Cervical Cancer Screenings
Next Article in Special Issue
Level of and Factors Determining Physical Activity in Students in Ukraine and the Visegrad Countries
Previous Article in Journal
Ultraviolet Radiation Albedo and Reflectance in Review: The Influence to Ultraviolet Exposure in Occupational Settings
Previous Article in Special Issue
Exercising in Air Pollution: The Cleanest versus Dirtiest Cities Challenge
Article Menu
Issue 7 (July) cover image

Export Article

Open AccessArticle

The Effects of High-Intensity Interval Training vs. Moderate-Intensity Continuous Training on Heart Rate Variability in Physically Inactive Adults

1
Department of Kinesiology, College of Health Sciences, University of Louisiana at Monroe, 700 University Avenue Brown Hall, Monroe, LA 71209, USA
2
Department of Exercise Physiology, College of Sport Sciences and Physical Activity, King Saud University, King Khalid Rd, Riyadh 11543, Saudi Arabia
3
Department of Counseling, Health, and Kinesiology, College of Education and Human Development Texas A&M University-San Antonio, One University Way, San Antonio, Texas, TX 78224, USA
*
Author to whom correspondence should be addressed.
Int. J. Environ. Res. Public Health 2018, 15(7), 1508; https://doi.org/10.3390/ijerph15071508
Received: 20 June 2018 / Revised: 13 July 2018 / Accepted: 13 July 2018 / Published: 17 July 2018
(This article belongs to the Special Issue Effect of Sport Activity on Health Promotion)
  |  
PDF [940 KB, uploaded 17 July 2018]
  |  

Abstract

Physically inactive adults are prevalent worldwide. This study compared the effects of short-term high-intensity interval training (HIIT) versus moderate-intensity continuous training (MICT) on heart rate variability (HRV) in physically inactive adults as a preliminary study. Thirteen physically inactive male adults (27.5 ± 3.80 years) were randomly assigned to HIIT (N = 7) or MICT (N = 6). The HIIT program consisted of 20 min of interval training with cycling to rest ratio of 10/50 s at ≥90% HRpeak, while the MICT program consisted of 40 min of continuous cycling at 60–75% HRpeak. Both groups completed eight sessions of training within two weeks. Time and frequency domains of HRV were measured for 20 min with Actiwave-Cardio monitor (CamNtech, UK). The number of R-R interval and inter-beat interval (IBI) were significantly improved (p < 0.05) in both HIIT and MICT programs following eight sessions of training. A significant interaction effect for group by time was found in the lnLF/HF ratio (p < 0.05) where it was only improved in the HIIT group from pre- to post-test. The HIIT program is superior to MICT in improving HRV in physically inactive adults. The HIIT program can be applied as a time-efficient program for improving cardiac-autoregulation. View Full-Text
Keywords: cardiac auto-regulation; frequency domain; time domain; blood pressure; exercise cardiac auto-regulation; frequency domain; time domain; blood pressure; exercise
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
SciFeed

Share & Cite This Article

MDPI and ACS Style

Alansare, A.; Alford, K.; Lee, S.; Church, T.; Jung, H.C. The Effects of High-Intensity Interval Training vs. Moderate-Intensity Continuous Training on Heart Rate Variability in Physically Inactive Adults. Int. J. Environ. Res. Public Health 2018, 15, 1508.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Int. J. Environ. Res. Public Health EISSN 1660-4601 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top