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Eur J Prev Cardiol. 2016 Jul;23(10):1037-44. doi: 10.1177/2047487315623708. Epub 2015 Dec 23.

Healthy lifestyle and heart rate variability in young adults.

Author information

1
Division of Internal Medicine, University Hospital Basel, Switzerland Cardiovascular Research Institute Basel, University Hospital Basel, Switzerland.
2
Cardiovascular Research Institute Basel, University Hospital Basel, Switzerland Cardiology Division, University Hospital Basel, Switzerland.
3
Cardiovascular Research Institute Basel, University Hospital Basel, Switzerland.
4
Swiss Tropical and Public Health Institute, Switzerland University of Basel, Switzerland.
5
Department of Sport, Exercise and Health, University of Basel, Switzerland.
6
Labormedizinisches Zentrum Dr Risch, Schaan, Principality of Liechtenstein Division of Laboratory Medicine, Kantonsspital Graubünden, Chur, Switzerland.
7
Labormedizinisches Zentrum Dr Risch, Schaan, Principality of Liechtenstein Division of Clinical Biochemistry, Medical University, Innsbruck, Austria Private University, Triesen, Principality of Liechtenstein.
8
Division of Internal Medicine, University Hospital Basel, Switzerland Cardiovascular Research Institute Basel, University Hospital Basel, Switzerland david.conen@usb.ch.

Abstract

BACKGROUND:

We aimed to determine the association of a comprehensive healthy lifestyle with heart rate variability (HRV), a validated measure of autonomic function.

DESIGN:

This was a prospective cohort study.

METHODS:

A population-based sample of 2079 individuals aged 25-41 years without prevalent cardiovascular disease was investigated. The standard deviation of all normal RR intervals (SDNN) during 24-hour electrocardiography was used as main HRV marker. Healthy lifestyle metrics were summed to a validated lifestyle-score ranging from 0 = most unhealthy to 7 = most healthy. One point was given for each of the following items: never smoking cigarettes; consuming a healthy diet; performing moderate (≥150 min/week) or vigorous (≥75 min/week) physical activity; body mass index (BMI)<25 kg/m(2); total cholesterol<200 mg/dl; glycated haemoglobin A1c<5.7%; and blood pressure<120 (systolic) and <80 mm Hg (diastolic).

RESULTS:

Median age of the participants (47% males) was 37 years. Mean SDNN was 153 ms and median lifestyle-score was four. A score of 0/1 or 6/7 was found in 5.2% and 11.0%, respectively. In multivariable linear regression analysis with SDNN as the outcome variable, the β-estimate (95% confidence interval (CI)) for a one-point increase of the lifestyle-score was 0.14 (0.11-0.17), p < 0.0001. This relationship was attenuated but remained significant after additional adjustment for resting heart rate (HR) (β-estimate (95% CI) 0.07 (0.07-0.10), p < 0.0001) or 24-hour HR (0.04 (0.01-0.07), p = 0.003).

CONCLUSIONS:

Few individuals adopted a healthy lifestyle in this large contemporary cohort of young adults from the general population. Adopting a healthy lifestyle has an important effect on autonomic function.

KEYWORDS:

Heart rate; heart rate variability; lifestyle; population-based

PMID:
26701874
DOI:
10.1177/2047487315623708
[Indexed for MEDLINE]

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