Sleep-time physiological recovery is associated with eating habits in distressed working-age Finns with overweight: secondary analysis of a randomised controlled trial

Elina Järvelä-Reijonen^#¹, Suvi Järvinen^#², Leila Karhunen^{1

3}, Tiina Föhr⁴, Tero Myllymäki⁵, Essi Sairanen^{5

6}, Sanni Lindroos⁷, Katri Peuhkuri^{7

8}, Maarit Hallikainen¹, Jussi Pihlajamäki^{1

3}, Sampsa Puttonen⁹, Riitta Korpela^{7

10}, Miikka Ermes¹, Raimo Lappalainen⁵, Urho M Kujala⁴, Marjukka Kolehmainen^#^{1

3}, Jaana Laitinen^#⁹

Affiliations

¹ Institute of Public Health and Clinical Nutrition, Clinical Nutrition, University of Eastern Finland, P.O. Box 1627, FI-70211, Kuopio, Finland.
² Institute of Public Health and Clinical Nutrition, Clinical Nutrition, University of Eastern Finland, P.O. Box 1627, FI-70211, Kuopio, Finland. suvi.a.jarvinen@uef.fi.
³ Institute of Clinical Medicine and Clinical Nutrition, Kuopio University Hospital, P.O. Box 100, FI-70029 KYS, Kuopio, Finland.
⁴ Faculty of Sport and Health Sciences, University of Jyväskylä, P.O. Box 35, FI-40014, Jyväskylä, Finland.
⁵ Department of Psychology, University of Jyväskylä, P.O. Box 35, FI-40014, Jyväskylä, Finland.
⁶ Department of Psychology, Karlstad University, SE-651 88, Karlstad, Sweden.
⁷ Medical Faculty, Pharmacology, Medical Nutrition Physiology, University of Helsinki, P.O. Box 63, FI-00014, Helsinki, Finland.
⁸ Social Services and Health Care, City of Helsinki, Helsinki, Finland.
⁹ Finnish Institute of Occupational Health, P.O. Box 40, FI-00251, Helsinki, Finland.
¹⁰ Medical Faculty, Human Microbe Research Program, University of Helsinki, P.O. Box 63, FI-00014, Helsinki, Finland.

^# Contributed equally.

PMID: 34183032
PMCID: PMC8237494
DOI: 10.1186/s12995-021-00310-6

Sleep-time physiological recovery is associated with eating habits in distressed working-age Finns with overweight: secondary analysis of a randomised controlled trial

Elina Järvelä-Reijonen et al. J Occup Med Toxicol. 2021.

. 2021 Jun 28;16(1):23.

doi: 10.1186/s12995-021-00310-6.

Authors

Affiliations

¹ Institute of Public Health and Clinical Nutrition, Clinical Nutrition, University of Eastern Finland, P.O. Box 1627, FI-70211, Kuopio, Finland.
² Institute of Public Health and Clinical Nutrition, Clinical Nutrition, University of Eastern Finland, P.O. Box 1627, FI-70211, Kuopio, Finland. suvi.a.jarvinen@uef.fi.
³ Institute of Clinical Medicine and Clinical Nutrition, Kuopio University Hospital, P.O. Box 100, FI-70029 KYS, Kuopio, Finland.
⁴ Faculty of Sport and Health Sciences, University of Jyväskylä, P.O. Box 35, FI-40014, Jyväskylä, Finland.
⁵ Department of Psychology, University of Jyväskylä, P.O. Box 35, FI-40014, Jyväskylä, Finland.
⁶ Department of Psychology, Karlstad University, SE-651 88, Karlstad, Sweden.
⁷ Medical Faculty, Pharmacology, Medical Nutrition Physiology, University of Helsinki, P.O. Box 63, FI-00014, Helsinki, Finland.
⁸ Social Services and Health Care, City of Helsinki, Helsinki, Finland.
⁹ Finnish Institute of Occupational Health, P.O. Box 40, FI-00251, Helsinki, Finland.
¹⁰ Medical Faculty, Human Microbe Research Program, University of Helsinki, P.O. Box 63, FI-00014, Helsinki, Finland.

^# Contributed equally.

PMID: 34183032
PMCID: PMC8237494
DOI: 10.1186/s12995-021-00310-6

Abstract

Background: Association of physiological recovery with nutrition has scarcely been studied. We investigated whether physiological recovery during sleep relates to eating habits, i.e., eating behaviour and diet quality.

Methods: Cross-sectional baseline analysis of psychologically distressed adults with overweight (N = 252) participating in a lifestyle intervention study in three Finnish cities. Recovery measures were based on sleep-time heart rate variability (HRV) measured for 3 consecutive nights. Measures derived from HRV were 1) RMSSD (Root Mean Square of the Successive Differences) indicating the parasympathetic activation of the autonomic nervous system and 2) Stress Balance (SB) indicating the temporal ratio of recovery to stress. Eating behaviour was measured with questionnaires (Intuitive Eating Scale, Three-Factor Eating Questionnaire, Health and Taste Attitude Scales, ecSatter Inventory™). Diet quality was quantified using questionnaires (Index of Diet Quality, Alcohol Use Disorders Identification Test Consumption) and 48-h dietary recall.

Results: Participants with best RMSSD reported less intuitive eating (p = 0.019) and less eating for physical rather than emotional reasons (p = 0.010) compared to those with poorest RMSSD; participants with good SB reported less unconditional permission to eat (p = 0.008), higher fibre intake (p = 0.028), higher diet quality (p = 0.001), and lower alcohol consumption (p < 0.001) compared to those with poor SB, although effect sizes were small. In subgroup analyses among participants who reported working regular daytime hours (n = 216), only the associations of SB with diet quality and alcohol consumption remained significant.

Conclusions: Better nocturnal recovery showed associations with better diet quality, lower alcohol consumption and possibly lower intuitive eating. In future lifestyle interventions and clinical practice, it is important to acknowledge sleep-time recovery as one possible factor linked with eating habits.

Trial registration: ClinicalTrials.gov Identifier NCT01738256 , Registered 17 August 2012.

Keywords: Dietary behaviour; Heart rate variability; Intuitive eating; Parasympathetic activity; Stress.

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Conflict of interest statement

T.M. is currently an employee and stockowner of Firstbeat Technologies Ltd., Jyväskylä, Finland. At the time that the Elixir intervention study was designed and conducted, he worked at the University of Jyväskylä. He did not participate in data analysis or writing the conclusions. No other conflicts of interest are declared by the authors.

Figures

**Fig. 1**
Differences among RMSSD tertiles (A, B) and Stress Balance groups (C) in eating-behaviour variables. Bars represent unadjusted means and SDs; p values are based on three-way ANOVAs with Šidák post hoc comparisons. Independent variables: RMSSD tertile / Stress Balance group, study centre, starting time of the study. [IES=Intuitive Eating Scale; RMSSD = Root Mean Square of the Successive Differences; SB=Stress Balance]

**Fig. 2**
Differences among Stress Balance groups in diet-quality variables. Bars represent unadjusted means and SDs; p values are based on three-way ANOVAs with Šidák post hoc comparisons. Independent variables: Stress Balance group, study centre, starting time of the study. IDQ = Index of Diet Quality; AUDIT-C = Alcohol Use Disorders Identification Test Consumption; SB=Stress Balance. ^ap value based on the LN transformed fibre intake (g/MJ)

See this image and copyright information in PMC

References

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Sleep-time physiological recovery is associated with eating habits in distressed working-age Finns with overweight: secondary analysis of a randomised controlled trial

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Sleep-time physiological recovery is associated with eating habits in distressed working-age Finns with overweight: secondary analysis of a randomised controlled trial

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Conflict of interest statement

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