Key result
Overweight and obese young adults had significantly higher resting heart rates (median 83.0 vs 69.5 bpm), lower percentage heart rate reserve, and slower heart rate recovery compared to healthy-weight controls.
Why the study?
Comparative studies on heart rate abnormalities at rest, chronotropic responses during submaximal exercise, and post-exercise recovery responses between healthy-weight and overweight or obese young adults were lacking.
Does overweight/obesity impair heart rate responses at rest, during submaximal exercise, and during recovery in healthy young adults?
Cross-Sectional (n=80)
No
Does overweight/obesity impair heart rate responses at rest, during submaximal exercise, and during recovery in healthy young adults?
Overweight and obesity in young adults are associated with submaximal chronotropic incompetence, blunted heart rate recovery, and poor cardiorespiratory fitness, highlighting early markers of cardiovascular risk.
Overweight/obese young adults exhibit higher resting HR and blunted chronotropic responses; hypothesis-generating for early autonomic screening, prospective studies needed before clinical use.
Background: There is a dearth of comparative studies on heart rate (HR) abnormalities at rest, chronotropic responses during submaximal exercise, and such responses during recovery from submaximal exercise between healthy-weight and overweight/obese young adults. Methods: Eighty healthy young adults (30 men and 50 women) aged 19 to 33 years participated in the present study. A symptom-limited, submaximal, cycle ergometer exercise test of intensity targeted at 60% to 70% of the subject's age-predicted maximum HR was performed. The HR, blood pressure, and minute ventilation were measured at rest and during exercise. Post-exercise, HR was first measured at 1 minute of recovery and then every 2 minutes until the 5th minute. Results: and ventilatory equivalent for oxygen were associated with resting HR, exercise HR parameters, and post-exercise HR recovery indices in both men and women. Conclusion: High resting HR, submaximal chronotropic incompetence, and blunted HR recovery in overweight/obese individuals in this study may be attributed to poor cardiorespiratory fitness and low respiratory efficiency.
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Dimkpa et al. (2023) conducted a cross-sectional in Overweight and Obesity (n=80). Overweight/Obesity (BMI ≥ 25 kg/m²) vs. Healthy-weight (BMI ≥ 18 to < 25 kg/m²) was evaluated on Resting heart rate (bpm) (p=<0.001). Overweight and obese young adults had significantly higher resting heart rates (median 83.0 vs 69.5 bpm), lower percentage heart rate reserve, and slower heart rate recovery compared to healthy-weight controls.
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