What is the clinical evidence from this study?

Study design: Cross-Sectional. Population: Overweight (n=45). Intervention: Physical activity and cardiorespiratory fitness. Primary outcome: Correlation of physical activity and cardiorespiratory fitness with heart rate variability parameters.

January 5, 2022Open Access

Correlation between physical activity, cardiorespiratory fitness and heart rate variability among young overweight adults

Key Result

Physical activity and cardiorespiratory fitness showed no significant correlation with time or frequency domain measures of heart rate variability among young overweight adults.

Study Design

Type

Cross-Sectional (n=45)

Multicenter

Structured PICO

Population

45 young overweight adults aged 18 to 30 years, free of known medical conditions, were assessed in a cross-sectional study to evaluate cardiac autonomic function.

Outcome

Correlation between physical activity, cardiorespiratory fitness and heart rate variability (time and frequency domain measures)surrogate

Physical activity and cardiorespiratory fitness do not appear to correlate with short-term heart rate variability in young overweight adults without known medical conditions.

Limitations

Use of BMI to classify overweight status without accounting for skeletal muscle mass or bone density
Subjective self-administered assessment of physical activity using the GPAQ
Failure to assess confounding factors such as diet, stress, sleep patterns, hormone levels, and metabolic biomarkers
Small sample size
Cross-sectional design limits the ability to establish causality

Abstract

Objective: Cardiac autonomic function assessed by heart rate variability (HRV) is a non-invasive, quantitative, and reliable marker of measurement. An altered cardiac autonomic function among overweight individuals predisposes them to a greater risk of developing cardiovascular diseases. The present study aims to determine the correlation between physical activity, cardiorespiratory fitness and heart rate variability among young overweight adults. Methods: , and without any known or diagnosed medical condition. Physical activity level and cardiorespiratory fitness were measured using the Global Physical Activity Questionnaire and Bruce treadmill protocol test, respectively. Cardiac autonomic function was measured using a 5-min short-term heart rate variability recording. The time and frequency domain measures of HRV were used for analysis. Results: The mean age of study participants was 22.53 ± 1.58 years and mean body mass index was 27.38 ± 1.51 kg/m2. Among young overweight adults, cardiorespiratory fitness and physical activity were not correlated with Root mean square of successive RR interval differences, Percentage of successive RR intervals that differ by more than 50 ms, and Ratio of LF ms2/HF ms2. Conclusion: The study found no correlation between physical activity and cardiorespiratory fitness with heart rate variability among young overweight individuals.

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