Association of Social Jetlag With Sleep Quality and Autonomic Cardiac Control During Sleep in Young Healthy Men
Social jetlag (SJL), the difference in sleep timing between work and free days is a consequence of the discrepancy between the individual’s circadian rhythm and the social clock. SJL is considered a chronic stress factor and has been linked to various health problems. In this field study, we examine...
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2019-09-01
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| Series: | Frontiers in Neuroscience |
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| Online Access: | https://www.frontiersin.org/article/10.3389/fnins.2019.00950/full |
| _version_ | 1818067420588277760 |
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| author | Ágnes Réka Sűdy Krisztina Ella Róbert Bódizs Róbert Bódizs Krisztina Káldi Krisztina Káldi |
| author_facet | Ágnes Réka Sűdy Krisztina Ella Róbert Bódizs Róbert Bódizs Krisztina Káldi Krisztina Káldi |
| author_sort | Ágnes Réka Sűdy |
| collection | DOAJ |
| description | Social jetlag (SJL), the difference in sleep timing between work and free days is a consequence of the discrepancy between the individual’s circadian rhythm and the social clock. SJL is considered a chronic stress factor and has been linked to various health problems. In this field study, we examined for the first time the association between SJL and cardiac regulation during sleep. 33 healthy young men aged 20–26 years participated in the study. The median SJL was used as a cut-off value to assign the participants into two groups with either lower or higher SJL. As a marker of autonomic control we analyzed heart rate variability (HRV) and addressed intra-individual differences between workdays and free days. In subjects with higher SJL, pNN50, an indicator of vagal activity was lower in the first 3 h of sleep on workday as compared to free day (day × sleep block × group, p = 0.015), indicating a more adaptable regulation on free days, when subjects slept according to their own preference. However, in subjects with lower SJL, no HRV differences were found between the two nights. SJL showed correlation with the free day-workday differences of both pNN50 and another vagal index, RMSSD in the first 2 h of sleep (p = 0.023 and 0.047, respectively). In subjects with higher SJL, a different HF power on workdays and free days (p = 0.031) also indicated that a shift in sleep timing is accompanied by an altered parasympathetic activity in the first few hours of sleep. Furthermore, subjective sleep quality on workdays was negatively associated with SJL (p = 0.02), and subjects with higher SJL reported worse sleep quality on workday than on free day (p = 0.027). Taken together, our data call attention on the potential effect of SJL on sleep quality and vagal activity during sleep. |
| first_indexed | 2024-12-10T15:23:24Z |
| format | Article |
| id | doaj.art-61b832c21d3345b1b86a00da668b6431 |
| institution | Directory Open Access Journal |
| issn | 1662-453X |
| language | English |
| last_indexed | 2024-12-10T15:23:24Z |
| publishDate | 2019-09-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Neuroscience |
| spelling | doaj.art-61b832c21d3345b1b86a00da668b64312022-12-22T01:43:36ZengFrontiers Media S.A.Frontiers in Neuroscience1662-453X2019-09-011310.3389/fnins.2019.00950472752Association of Social Jetlag With Sleep Quality and Autonomic Cardiac Control During Sleep in Young Healthy MenÁgnes Réka Sűdy0Krisztina Ella1Róbert Bódizs2Róbert Bódizs3Krisztina Káldi4Krisztina Káldi5Department of Physiology, Semmelweis University, Budapest, HungaryDepartment of Physiology, Semmelweis University, Budapest, HungaryInstitute of Behavioural Sciences, Semmelweis University, Budapest, HungaryNational Institute of Clinical Neurosciences, Budapest, HungaryDepartment of Physiology, Semmelweis University, Budapest, HungaryDepartment of Laboratory Medicine, Semmelweis University, Budapest, HungarySocial jetlag (SJL), the difference in sleep timing between work and free days is a consequence of the discrepancy between the individual’s circadian rhythm and the social clock. SJL is considered a chronic stress factor and has been linked to various health problems. In this field study, we examined for the first time the association between SJL and cardiac regulation during sleep. 33 healthy young men aged 20–26 years participated in the study. The median SJL was used as a cut-off value to assign the participants into two groups with either lower or higher SJL. As a marker of autonomic control we analyzed heart rate variability (HRV) and addressed intra-individual differences between workdays and free days. In subjects with higher SJL, pNN50, an indicator of vagal activity was lower in the first 3 h of sleep on workday as compared to free day (day × sleep block × group, p = 0.015), indicating a more adaptable regulation on free days, when subjects slept according to their own preference. However, in subjects with lower SJL, no HRV differences were found between the two nights. SJL showed correlation with the free day-workday differences of both pNN50 and another vagal index, RMSSD in the first 2 h of sleep (p = 0.023 and 0.047, respectively). In subjects with higher SJL, a different HF power on workdays and free days (p = 0.031) also indicated that a shift in sleep timing is accompanied by an altered parasympathetic activity in the first few hours of sleep. Furthermore, subjective sleep quality on workdays was negatively associated with SJL (p = 0.02), and subjects with higher SJL reported worse sleep quality on workday than on free day (p = 0.027). Taken together, our data call attention on the potential effect of SJL on sleep quality and vagal activity during sleep.https://www.frontiersin.org/article/10.3389/fnins.2019.00950/fullautonomic nervous systemheart rate variabilitysleep qualitycircadian misalignmentsocial jetlagcardiovascular risk factor |
| spellingShingle | Ágnes Réka Sűdy Krisztina Ella Róbert Bódizs Róbert Bódizs Krisztina Káldi Krisztina Káldi Association of Social Jetlag With Sleep Quality and Autonomic Cardiac Control During Sleep in Young Healthy Men Frontiers in Neuroscience autonomic nervous system heart rate variability sleep quality circadian misalignment social jetlag cardiovascular risk factor |
| title | Association of Social Jetlag With Sleep Quality and Autonomic Cardiac Control During Sleep in Young Healthy Men |
| title_full | Association of Social Jetlag With Sleep Quality and Autonomic Cardiac Control During Sleep in Young Healthy Men |
| title_fullStr | Association of Social Jetlag With Sleep Quality and Autonomic Cardiac Control During Sleep in Young Healthy Men |
| title_full_unstemmed | Association of Social Jetlag With Sleep Quality and Autonomic Cardiac Control During Sleep in Young Healthy Men |
| title_short | Association of Social Jetlag With Sleep Quality and Autonomic Cardiac Control During Sleep in Young Healthy Men |
| title_sort | association of social jetlag with sleep quality and autonomic cardiac control during sleep in young healthy men |
| topic | autonomic nervous system heart rate variability sleep quality circadian misalignment social jetlag cardiovascular risk factor |
| url | https://www.frontiersin.org/article/10.3389/fnins.2019.00950/full |
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