Sport Biosciences

The Effect of Five-Week High-Intensity Interval Training on HRV and RPP Parameters in Girls Aged 7 to 9 Years: Relation to Childhood Overweight

Document Type : Research Paper

Authors

Fatemeh Ranjbar 1
Fahimeh Esfarjani 2
Mohamad Marandi 1

1 Department of Sport Biosciences, Faculty of Physical Education and Sport Sciences, University of Isfahan, Isfahan, Iran

2 Corresponding Author, Department of Sport Biosciences, Faculty of Physical Education and Sport Sciences, University of Isfahan, Isfahan, Iran

https://doi.org/10.22059/jsb.2023.352844.1566
Abstract
Introduction: Overweight and obesity in children are the underlying cause of cardiovascular problems that occur through Autonomic Nervous System (ANS) dysfunction, However, physical training has a beneficial effect on the ANS. These changes can be measured through Heart Rate Variability (HRV) indices. Accordingly, the present study aimed to investigate the effect of five weeks of High-Intensity Interval Training (HIIT) on HRV and Rate Pressure Product (RPP) of overweight girls.
Methods: In this research, overweight students in the range of +2 < BMI Z-SCORE <1+ participated in the Experimental and the Control groups. Before and after five weeks of HIIT intervention, the participants underwent the Shuttle Run test to estimate maximal oxygen consumption and the Six-Minute Walking test to estimate maximal fat oxidation (MFO) during exercise. Root Mean Square of Successive Difference (RMSSD) of the R-R wave interval of the heartbeat was recorded to measure resting HRV and also systolic blood pressure and heart rate were recorded to measure resting RPP in the first and the last week. Data analysis was done using dependent t-tests and analysis of covariance (ANCOVA) with a significance level of p<0.05.
Results: the results showed that in the training group, five weeks of HIIT intervention caused significant changes in RMSSD, RPP, and MFO of overweight girls (P<0.05). However, in the control group, the indices did not change significantly (P>0.05).
Conclusion: RMSSD, RPP, and MFO indices can be used as suitable and efficient alternatives to identify children at risk and therapeutic processes before puberty.

Keywords

Heart rate variability
High-intensity interval training
Maximal fat oxidation
Rate pressure product
Six-minute walk test
Subjects
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  • Receive Date 30 December 2022
  • Revise Date 09 March 2023
  • Accept Date 11 March 2023

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