Effects of eating together online on autonomic nervous system functions: a randomized, open-label, controlled preliminary study among healthy volunteers

Abstract Background Eating alone has been significantly associated with psychological distress. However, there is no research that evaluates the effects or relation of eating together online to autonomic nervous system functions. Methods This is a randomized, open-label, controlled, pilot study cond...

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Main Authors: Hideaki Hasuo, Nahoko Kusaka, Mutsuo Sano, Kenji Kanbara, Tomoki Kitawaki, Hiroko Sakuma, Tomoya Sakazaki, Kohei Yoshida, Hisaharu Shizuma, Hideo Araki, Motoyuki Suzuki, Satoshi Nishiguchi, Masaki Shuzo, Gaku Masuda, Kei Shimonishi, Kazuaki Kondo, Hirotada Ueda, Yuichi Nakamura
Format: Article
Language:English
Published: BMC 2023-03-01
Series:BioPsychoSocial Medicine
Subjects:
Online Access:https://doi.org/10.1186/s13030-023-00263-8
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author Hideaki Hasuo
Nahoko Kusaka
Mutsuo Sano
Kenji Kanbara
Tomoki Kitawaki
Hiroko Sakuma
Tomoya Sakazaki
Kohei Yoshida
Hisaharu Shizuma
Hideo Araki
Motoyuki Suzuki
Satoshi Nishiguchi
Masaki Shuzo
Gaku Masuda
Kei Shimonishi
Kazuaki Kondo
Hirotada Ueda
Yuichi Nakamura
author_facet Hideaki Hasuo
Nahoko Kusaka
Mutsuo Sano
Kenji Kanbara
Tomoki Kitawaki
Hiroko Sakuma
Tomoya Sakazaki
Kohei Yoshida
Hisaharu Shizuma
Hideo Araki
Motoyuki Suzuki
Satoshi Nishiguchi
Masaki Shuzo
Gaku Masuda
Kei Shimonishi
Kazuaki Kondo
Hirotada Ueda
Yuichi Nakamura
author_sort Hideaki Hasuo
collection DOAJ
description Abstract Background Eating alone has been significantly associated with psychological distress. However, there is no research that evaluates the effects or relation of eating together online to autonomic nervous system functions. Methods This is a randomized, open-label, controlled, pilot study conducted among healthy volunteers. Participants were randomized into either an eating together online group or an eating-alone group. The effect of eating together on autonomic nervous functions was evaluated and compared with that of the control (eating alone). The primary endpoint was the change in the standard deviation of the normal-to-normal interval (SDNN) scores among heart rate variabilities (HRV) before and after eating. Physiological synchrony was investigated based on changes in the SDNN scores. Results A total of 31 women and 25 men (mean age, 36.6 [SD = 9.9] years) were included in the study. In the comparison between the aforementioned groups, two-way analysis of variance revealed interactions between time and group on SDNN scores. SDNN scores in the eating together online group increased in the first and second halves of eating time (F[1,216], P < 0.001 and F[1,216], P = 0.022). Moreover, high correlations were observed in the changes in each pair before and during the first half of eating time as well as before and during the second half of eating time (r = 0.642, P = 0.013 and r = 0.579, P = 0.030). These were statistically significantly higher than those in the eating-alone group (P = 0.005 and P = 0.040). Conclusions The experience of eating together online increased HRV during eating. Variations in pairs were correlated and may have induced physiological synchrony. Trial registration The University Hospital Medical Information Network Clinical Trials Registry, UMIN000045161. Registered September 1, 2021. https://center6.umin.ac.jp/cgi-open-bin/icdr/ctr_view.cgi?recptno=R000051592 .
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spelling doaj.art-9f3d8b9ab74f4ece91ba62ff8d9c8fc82023-03-22T11:39:33ZengBMCBioPsychoSocial Medicine1751-07592023-03-011711910.1186/s13030-023-00263-8Effects of eating together online on autonomic nervous system functions: a randomized, open-label, controlled preliminary study among healthy volunteersHideaki Hasuo0Nahoko Kusaka1Mutsuo Sano2Kenji Kanbara3Tomoki Kitawaki4Hiroko Sakuma5Tomoya Sakazaki6Kohei Yoshida7Hisaharu Shizuma8Hideo Araki9Motoyuki Suzuki10Satoshi Nishiguchi11Masaki Shuzo12Gaku Masuda13Kei Shimonishi14Kazuaki Kondo15Hirotada Ueda16Yuichi Nakamura17Department of Psychosomatic Medicine, Kansai Medical UniversityFaculty of Contemporary Social Studies, Doshisha Women’s College of Liberal ArtsFaculty of Information Science and Technology, Osaka Institute of TechnologyPsychosomatic Medicine, Clinical Psychology, Faculty of Medicine, Kagawa UniversityDepartment of Mathematics, Kansai Medical UniversityDepartment of Psychosomatic Medicine, Kansai Medical UniversityDepartment of Psychosomatic Medicine, Kansai Medical UniversityDepartment of Psychosomatic Medicine, Kansai Medical UniversityDepartment of Psychosomatic Medicine, Kansai Medical UniversityFaculty of Information Science and Technology, Osaka Institute of TechnologyFaculty of Information Science and Technology, Osaka Institute of TechnologyFaculty of Information Science and Technology, Osaka Institute of TechnologyCenter for Research and Collaboration, Tokyo Denki UniversityThe Section of Global Health, Department of Hygiene and Public Health, Tokyo Women’s Medical UniversityAcademic Center for Computing Media Studies, Kyoto UniversityAcademic Center for Computing Media Studies, Kyoto UniversityAcademic Center for Computing Media Studies, Kyoto UniversityAcademic Center for Computing Media Studies, Kyoto UniversityAbstract Background Eating alone has been significantly associated with psychological distress. However, there is no research that evaluates the effects or relation of eating together online to autonomic nervous system functions. Methods This is a randomized, open-label, controlled, pilot study conducted among healthy volunteers. Participants were randomized into either an eating together online group or an eating-alone group. The effect of eating together on autonomic nervous functions was evaluated and compared with that of the control (eating alone). The primary endpoint was the change in the standard deviation of the normal-to-normal interval (SDNN) scores among heart rate variabilities (HRV) before and after eating. Physiological synchrony was investigated based on changes in the SDNN scores. Results A total of 31 women and 25 men (mean age, 36.6 [SD = 9.9] years) were included in the study. In the comparison between the aforementioned groups, two-way analysis of variance revealed interactions between time and group on SDNN scores. SDNN scores in the eating together online group increased in the first and second halves of eating time (F[1,216], P < 0.001 and F[1,216], P = 0.022). Moreover, high correlations were observed in the changes in each pair before and during the first half of eating time as well as before and during the second half of eating time (r = 0.642, P = 0.013 and r = 0.579, P = 0.030). These were statistically significantly higher than those in the eating-alone group (P = 0.005 and P = 0.040). Conclusions The experience of eating together online increased HRV during eating. Variations in pairs were correlated and may have induced physiological synchrony. Trial registration The University Hospital Medical Information Network Clinical Trials Registry, UMIN000045161. Registered September 1, 2021. https://center6.umin.ac.jp/cgi-open-bin/icdr/ctr_view.cgi?recptno=R000051592 .https://doi.org/10.1186/s13030-023-00263-8Eating together onlineEating aloneHeart rate variabilityInteractionPhysiological synchrony
spellingShingle Hideaki Hasuo
Nahoko Kusaka
Mutsuo Sano
Kenji Kanbara
Tomoki Kitawaki
Hiroko Sakuma
Tomoya Sakazaki
Kohei Yoshida
Hisaharu Shizuma
Hideo Araki
Motoyuki Suzuki
Satoshi Nishiguchi
Masaki Shuzo
Gaku Masuda
Kei Shimonishi
Kazuaki Kondo
Hirotada Ueda
Yuichi Nakamura
Effects of eating together online on autonomic nervous system functions: a randomized, open-label, controlled preliminary study among healthy volunteers
BioPsychoSocial Medicine
Eating together online
Eating alone
Heart rate variability
Interaction
Physiological synchrony
title Effects of eating together online on autonomic nervous system functions: a randomized, open-label, controlled preliminary study among healthy volunteers
title_full Effects of eating together online on autonomic nervous system functions: a randomized, open-label, controlled preliminary study among healthy volunteers
title_fullStr Effects of eating together online on autonomic nervous system functions: a randomized, open-label, controlled preliminary study among healthy volunteers
title_full_unstemmed Effects of eating together online on autonomic nervous system functions: a randomized, open-label, controlled preliminary study among healthy volunteers
title_short Effects of eating together online on autonomic nervous system functions: a randomized, open-label, controlled preliminary study among healthy volunteers
title_sort effects of eating together online on autonomic nervous system functions a randomized open label controlled preliminary study among healthy volunteers
topic Eating together online
Eating alone
Heart rate variability
Interaction
Physiological synchrony
url https://doi.org/10.1186/s13030-023-00263-8
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