Pub Date : 2022-02-24DOI: 10.1080/09291016.2022.2044629
D. Hill, H. Chtourou
ABSTRACT The purpose of this study was to investigate the effects of one night’s sleep loss on mood state and exercise performance, for the purpose of identifying relationships between mood state and performance. A within-subjects repeated-measures design was used. Seven women (21 ± 2 y, 164 ± 9 cm, 62 ± 14 kg) participated. They completed Profile of Mood States questionnaires and performed exhaustive extreme intensity cycle ergometer tests (310 ± 70 W) before, and on three consecutive days following, one night’s sleep loss. Mean time to exhaustion was not affected by sleep loss. Mean total mood state disturbance was elevated on days 1 and 2 after sleep loss compared to baseline. There were strong correlations (r > 0.82) between individual changes (day 1 minus baseline, day 2 minus baseline, day 3 minus baseline) in time to exhaustion and individual changes in mood state: changes in time to exhaustion were associated with changes in the fatigue subscore on day 1; with changes in the vigour subscore on day 2, and with changes in the fatigue subscore on day 3. These results demonstrate a relationship, which may or may not reflect causality, between mood state and performance.
{"title":"Sleep loss, mood state, and performance of extreme intensity cycling exercise","authors":"D. Hill, H. Chtourou","doi":"10.1080/09291016.2022.2044629","DOIUrl":"https://doi.org/10.1080/09291016.2022.2044629","url":null,"abstract":"ABSTRACT The purpose of this study was to investigate the effects of one night’s sleep loss on mood state and exercise performance, for the purpose of identifying relationships between mood state and performance. A within-subjects repeated-measures design was used. Seven women (21 ± 2 y, 164 ± 9 cm, 62 ± 14 kg) participated. They completed Profile of Mood States questionnaires and performed exhaustive extreme intensity cycle ergometer tests (310 ± 70 W) before, and on three consecutive days following, one night’s sleep loss. Mean time to exhaustion was not affected by sleep loss. Mean total mood state disturbance was elevated on days 1 and 2 after sleep loss compared to baseline. There were strong correlations (r > 0.82) between individual changes (day 1 minus baseline, day 2 minus baseline, day 3 minus baseline) in time to exhaustion and individual changes in mood state: changes in time to exhaustion were associated with changes in the fatigue subscore on day 1; with changes in the vigour subscore on day 2, and with changes in the fatigue subscore on day 3. These results demonstrate a relationship, which may or may not reflect causality, between mood state and performance.","PeriodicalId":9208,"journal":{"name":"Biological Rhythm Research","volume":"53 1","pages":"1801 - 1810"},"PeriodicalIF":1.1,"publicationDate":"2022-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47427719","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-02-21DOI: 10.1080/09291016.2022.2043588
N. Hu, Changyue Yu, Jiaxin Jin, Xinmiao Zhao, Yingying Zhao, Hua Wei, Yingdong Li
ABSTRACT Many physiological activities in amphibians show rhythmic changes to adapt to ambient light conditions. However, the effects of photoperiod variation on the immune and antioxidant status and their possible correlation with different tissues have not been reported in Dybowski’s frog, Rana dybowskii. In this study, the specific activities of immune and antioxidant enzymes in R. dybowskii under different photoperiods were evaluated. The results demonstrated that the photoperiod significantly impacted antioxidant enzymes and immune enzymes in Dybowski’s frog. In terms of antioxidant enzyme activity, catalase (CAT) and superoxide dismutase (SOD) activities in frogs at 6 L:18D and 0 L:24D were significantly higher than those at 18 L:6D and 24 L:0D, respectively. Further, the activities of these enzymes increased during the dark phase and decreased during the light phase. The malondialdehyde (MDA) content decreased significantly with the decrease in photoperiod time. Lysozyme (LZM) activity in serum and the liver decreased with a prolonged photoperiod. LZM activity in the dark cycle was higher, but the peak activity in skin occurred at noon. Thus, long-term light exposure may cause oxidative stress in Dybowski’s frog. Accordingly, a 6 L:18D photoperiod may be suitable for optimum physiological functions of this species.
{"title":"Impact of photoperiods on the specific activities of immune and antioxidant enzymes in different tissues of Dybowski’s frog (Rana dybowskii)","authors":"N. Hu, Changyue Yu, Jiaxin Jin, Xinmiao Zhao, Yingying Zhao, Hua Wei, Yingdong Li","doi":"10.1080/09291016.2022.2043588","DOIUrl":"https://doi.org/10.1080/09291016.2022.2043588","url":null,"abstract":"ABSTRACT Many physiological activities in amphibians show rhythmic changes to adapt to ambient light conditions. However, the effects of photoperiod variation on the immune and antioxidant status and their possible correlation with different tissues have not been reported in Dybowski’s frog, Rana dybowskii. In this study, the specific activities of immune and antioxidant enzymes in R. dybowskii under different photoperiods were evaluated. The results demonstrated that the photoperiod significantly impacted antioxidant enzymes and immune enzymes in Dybowski’s frog. In terms of antioxidant enzyme activity, catalase (CAT) and superoxide dismutase (SOD) activities in frogs at 6 L:18D and 0 L:24D were significantly higher than those at 18 L:6D and 24 L:0D, respectively. Further, the activities of these enzymes increased during the dark phase and decreased during the light phase. The malondialdehyde (MDA) content decreased significantly with the decrease in photoperiod time. Lysozyme (LZM) activity in serum and the liver decreased with a prolonged photoperiod. LZM activity in the dark cycle was higher, but the peak activity in skin occurred at noon. Thus, long-term light exposure may cause oxidative stress in Dybowski’s frog. Accordingly, a 6 L:18D photoperiod may be suitable for optimum physiological functions of this species.","PeriodicalId":9208,"journal":{"name":"Biological Rhythm Research","volume":"53 1","pages":"1790 - 1799"},"PeriodicalIF":1.1,"publicationDate":"2022-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48496758","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-02-15DOI: 10.1080/09291016.2022.2041797
M. Hoshikawa
ABSTRACT The purpose of this study was to examine the correlation between the Munich ChronoType Questionnaire (MCTQ) index and time at minimum core temperature. Nine athletes were requested to answer the MCTQ questionnaire and monitor their core temperature during night. In the MCTQ, the midpoint of sleep on free day, which is corrected for sleep debt accumulated during the workweek (MSFsc), was calculated. The core temperature was monitored using a telemetric system with an ingestible capsule-type sensor. The correlation between the MSFsc and the time at the lowest core temperature was examined. The range of MSFsc and time at minimum core temperature were 2.54–7.75 (mean ±SE: 4.54 ± 0.52, 95%CI: 3.52–5.55) and 3:43–7:41 (mean ±SE: 5:24 ± 0:32, 95%CI: 4:21–6:27), respectively. Four participants with their MSFsc later than 4.96 showed times at minimum core temperature later than 6:00. A significant correlation between the MSFsc and time at minimum core temperature was observed, with a very high correlation coefficient (r = 0.86, p < 0.01). These results suggest that the MSFsc may be useful to find athletes who have a better chance to advance their circadian rhythmicity for morning competitions.
{"title":"Relationships between the Munich Chronotype questionnaire index and time at minimum core temperature","authors":"M. Hoshikawa","doi":"10.1080/09291016.2022.2041797","DOIUrl":"https://doi.org/10.1080/09291016.2022.2041797","url":null,"abstract":"ABSTRACT The purpose of this study was to examine the correlation between the Munich ChronoType Questionnaire (MCTQ) index and time at minimum core temperature. Nine athletes were requested to answer the MCTQ questionnaire and monitor their core temperature during night. In the MCTQ, the midpoint of sleep on free day, which is corrected for sleep debt accumulated during the workweek (MSFsc), was calculated. The core temperature was monitored using a telemetric system with an ingestible capsule-type sensor. The correlation between the MSFsc and the time at the lowest core temperature was examined. The range of MSFsc and time at minimum core temperature were 2.54–7.75 (mean ±SE: 4.54 ± 0.52, 95%CI: 3.52–5.55) and 3:43–7:41 (mean ±SE: 5:24 ± 0:32, 95%CI: 4:21–6:27), respectively. Four participants with their MSFsc later than 4.96 showed times at minimum core temperature later than 6:00. A significant correlation between the MSFsc and time at minimum core temperature was observed, with a very high correlation coefficient (r = 0.86, p < 0.01). These results suggest that the MSFsc may be useful to find athletes who have a better chance to advance their circadian rhythmicity for morning competitions.","PeriodicalId":9208,"journal":{"name":"Biological Rhythm Research","volume":"53 1","pages":"1782 - 1789"},"PeriodicalIF":1.1,"publicationDate":"2022-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45040607","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-02-14DOI: 10.1080/09291016.2022.2041289
M. Borisenkov, S. Popov, V. Smirnov, D. Gubin, I. Petrov, T. Vasilkova, S. Solovieva, E. Martinson, Anna A Pechеrkina, O. Dorogina, E. Symaniuk
ABSTRACT The aim of this study is to evaluate the associations among time perspective, sleep-wake rhythm characteristics, and psycho-emotional state during COVID-19 isolation. The study was carried out from April 17 to 14 June 2020and involved 844 people aged 17 to 26 years (average age: 19.4 ± 1.8 years, women: 79.4%). Each study participant filled out the Zimbardo Time Perspective Inventory, the Munich ChronoType Questionnaire, and Beck Depression Inventory. There were significant changes in the sleep characteristics during isolation: sleep duration increased by 56 minutes, sleep efficiency decreased by 2.4%, sleep phase delayed by 53 minutes, while social jetlag decreased by 77 minutes. Individuals with balanced, future, and past positive time perspective had better sleep characteristics, and were less likely to exhibit symptoms of depression. Persons with past negative, present hedonistic and present fatalistic time perspective were more likely to have worse sleep characteristics, and exhibited signs of depression. The results of the study indicate that persons focused on long-term planning for their lives generally endured the COVID-19 isolation more easily.
{"title":"Associations among sleep-wake rhythm characteristics, time perspective and psycho-emotional state during COVID-19 isolation","authors":"M. Borisenkov, S. Popov, V. Smirnov, D. Gubin, I. Petrov, T. Vasilkova, S. Solovieva, E. Martinson, Anna A Pechеrkina, O. Dorogina, E. Symaniuk","doi":"10.1080/09291016.2022.2041289","DOIUrl":"https://doi.org/10.1080/09291016.2022.2041289","url":null,"abstract":"ABSTRACT The aim of this study is to evaluate the associations among time perspective, sleep-wake rhythm characteristics, and psycho-emotional state during COVID-19 isolation. The study was carried out from April 17 to 14 June 2020and involved 844 people aged 17 to 26 years (average age: 19.4 ± 1.8 years, women: 79.4%). Each study participant filled out the Zimbardo Time Perspective Inventory, the Munich ChronoType Questionnaire, and Beck Depression Inventory. There were significant changes in the sleep characteristics during isolation: sleep duration increased by 56 minutes, sleep efficiency decreased by 2.4%, sleep phase delayed by 53 minutes, while social jetlag decreased by 77 minutes. Individuals with balanced, future, and past positive time perspective had better sleep characteristics, and were less likely to exhibit symptoms of depression. Persons with past negative, present hedonistic and present fatalistic time perspective were more likely to have worse sleep characteristics, and exhibited signs of depression. The results of the study indicate that persons focused on long-term planning for their lives generally endured the COVID-19 isolation more easily.","PeriodicalId":9208,"journal":{"name":"Biological Rhythm Research","volume":"53 1","pages":"1770 - 1781"},"PeriodicalIF":1.1,"publicationDate":"2022-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47456635","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-01-26DOI: 10.1080/09291016.2022.2031422
Piya Majumdar, Sasangbaha Mandi, Ankita Biswas, P. Nayak, S. Sahu
ABSTRACT The impact of the COVID-19 pandemic is inescapable which encompasses both physical and mental health myriads. To combat the pandemic, lockdown has been imposed worldwide, the impact of which, and, the subsequent new normal phase has raised global concern. Two workforces of the Indian population, rural agrarian and urban corporate, were compared for impact on sleep quality, depressive symptomatology, screen exposure, somatic pain and other health co-morbidities in three-time frames – prior, during and post lockdown periods. An online survey was conducted for those engaged in the urban corporate sector (N=146) and an interview for the rural agrarian workforce (N=100). Both the workforces had adumbrated significant (p<0.05) variations in sleep behavior with changes noted in sleep latency and feeling of sleepiness, being higher during the lockdown phase. The screen time had also been identified to be positively related to the presence of depressive symptomatology and negatively with sleep duration among both the workforces. Our findings suggest that COVID-19 induced lockdown affects the urban corporate more with erratic sleep behavior, enhanced psychometric distress, somatic discomfort and behavioral modifications that might be due to social isolation, reliance over digital use, and disoriented work schedule .
{"title":"COVID-19 pandemic-imposed lockdown: impacts on the rural agrarian and the urban corporate workforce of India","authors":"Piya Majumdar, Sasangbaha Mandi, Ankita Biswas, P. Nayak, S. Sahu","doi":"10.1080/09291016.2022.2031422","DOIUrl":"https://doi.org/10.1080/09291016.2022.2031422","url":null,"abstract":"ABSTRACT The impact of the COVID-19 pandemic is inescapable which encompasses both physical and mental health myriads. To combat the pandemic, lockdown has been imposed worldwide, the impact of which, and, the subsequent new normal phase has raised global concern. Two workforces of the Indian population, rural agrarian and urban corporate, were compared for impact on sleep quality, depressive symptomatology, screen exposure, somatic pain and other health co-morbidities in three-time frames – prior, during and post lockdown periods. An online survey was conducted for those engaged in the urban corporate sector (N=146) and an interview for the rural agrarian workforce (N=100). Both the workforces had adumbrated significant (p<0.05) variations in sleep behavior with changes noted in sleep latency and feeling of sleepiness, being higher during the lockdown phase. The screen time had also been identified to be positively related to the presence of depressive symptomatology and negatively with sleep duration among both the workforces. Our findings suggest that COVID-19 induced lockdown affects the urban corporate more with erratic sleep behavior, enhanced psychometric distress, somatic discomfort and behavioral modifications that might be due to social isolation, reliance over digital use, and disoriented work schedule .","PeriodicalId":9208,"journal":{"name":"Biological Rhythm Research","volume":"53 1","pages":"1753 - 1769"},"PeriodicalIF":1.1,"publicationDate":"2022-01-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41446524","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-01-06DOI: 10.1080/09291016.2021.2024408
Yun Jae Eo, Jingyu Park, Seohyeon Kim, Keyong Nam Lee, Seung Min Lee, D. Kim, Changwook Kim, Y. R. Do
ABSTRACT Because the circadian rhythm is different for each individual depending on what light environment they are exposed to on that day, the circadian rhythm needs to be constantly managed in everyday life. However, the typical circadian markers, changes in melatonin (MLT), and core body temperature (CBT) are difficult to measure 24-hour cycle of daily life. In this study, to propose relatively easy-to-monitor cardiac rhythmicity-related indicators as circadian markers, the biomarkers, including MLT, CBT, heart rate (HR), and heart rate variability (HRV), were collected from 22 Korean men. The MLT and CBT showed the largest positive correlation with R wave-to-R wave (RR) interval (Pearson’s r = .620, p < .001) and HR (Pearson’s r = .476, p < .001), respectively. In addition, the difference between the peak times of the seventh-order fitted MLT (adjusted R2 = .960, peak time 04:56) and RR interval (adjusted R2 = .960, peak time 04:35) was approximately 21 min; especially, the nadir times of the fitted CBT (adjusted R2 = .961, nadir time 04:55) and HR (adjusted R2 = .934, nadir time 04:52) were almost the same. Therefore, we can confidently say that HR and RR intervals are good indicators for estimating an individual’s circadian rhythm.
由于每个人的昼夜节律取决于他们当天所处的光环境，因此在日常生活中需要不断地管理昼夜节律。然而，典型的昼夜节律标志，褪黑激素(MLT)变化和核心体温(CBT)难以测量日常生活的24小时周期。在这项研究中，为了提出相对容易监测的心律相关指标作为昼夜节律标志物，我们收集了22名韩国男性的生物标志物，包括MLT、CBT、心率(HR)和心率变异性(HRV)。MLT和CBT分别与R波-R波(RR)间隔(Pearson’s R = 0.620, p < 0.001)和HR (Pearson’s R = 0.476, p < 0.001)呈正相关。此外，七阶拟合MLT的峰值时间(调整R2 = 0.960，峰值时间04:56)与RR间隔(调整R2 = 0.960，峰值时间04:35)的差异约为21 min;其中，拟合CBT(调整R2 = .961，最低点时间04:55)和HR(调整R2 = .934，最低点时间04:52)的最低点时间几乎相同。因此，我们可以自信地说，HR和RR间隔是估计个体昼夜节律的良好指标。
{"title":"Estimation of melatonin level and core body temperature: heart rate and heart rate variability as circadian rhythm markers","authors":"Yun Jae Eo, Jingyu Park, Seohyeon Kim, Keyong Nam Lee, Seung Min Lee, D. Kim, Changwook Kim, Y. R. Do","doi":"10.1080/09291016.2021.2024408","DOIUrl":"https://doi.org/10.1080/09291016.2021.2024408","url":null,"abstract":"ABSTRACT Because the circadian rhythm is different for each individual depending on what light environment they are exposed to on that day, the circadian rhythm needs to be constantly managed in everyday life. However, the typical circadian markers, changes in melatonin (MLT), and core body temperature (CBT) are difficult to measure 24-hour cycle of daily life. In this study, to propose relatively easy-to-monitor cardiac rhythmicity-related indicators as circadian markers, the biomarkers, including MLT, CBT, heart rate (HR), and heart rate variability (HRV), were collected from 22 Korean men. The MLT and CBT showed the largest positive correlation with R wave-to-R wave (RR) interval (Pearson’s r = .620, p < .001) and HR (Pearson’s r = .476, p < .001), respectively. In addition, the difference between the peak times of the seventh-order fitted MLT (adjusted R2 = .960, peak time 04:56) and RR interval (adjusted R2 = .960, peak time 04:35) was approximately 21 min; especially, the nadir times of the fitted CBT (adjusted R2 = .961, nadir time 04:55) and HR (adjusted R2 = .934, nadir time 04:52) were almost the same. Therefore, we can confidently say that HR and RR intervals are good indicators for estimating an individual’s circadian rhythm.","PeriodicalId":9208,"journal":{"name":"Biological Rhythm Research","volume":"53 1","pages":"1735 - 1752"},"PeriodicalIF":1.1,"publicationDate":"2022-01-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47252875","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-01-04DOI: 10.1080/09291016.2021.2020993
S. Cui, Yuanyuan Chen, Yunfei Guo, Dahu Chen
ABSTRACT The mental, physical and behavioural changes that follow a 24-hour cycle are defined as circadian rhythms, and this response to light and dark affects most living things, including animals, plants and microbes. Biological clocks are composed of specific molecules (clock genes) that interact with cells throughout the body and are the timing devices that organisms use to regulate circadian rhythms. Circadian rhythms have been observed in the human gastrointestinal tract. To this end, basal gastric acid production, epithelial cell proliferation, gastrointestinal motility and appetite regulation vary with the time of day. The abnormal expression of clock genes can alter normal circadian rhythms and subsequently cause a variety of illnesses, including cancers. The aim of this study was to discuss and summarize the relationship between the expression of clock genes and the development and progression of gastric cancer and to explore the possibility of using these genes as biomarkers in gastric cancer prognosis in patients. Abbreviations: RORE: retinoic acid-related orphan receptor response element; CLOCK: circadian locomotor output cycles kaput; BMAL1: brain and muscle ARNT-like protein 1; ARNTL: aryl hydrocarbon receptor nuclear translocator-like; PER: period; CRY: cryptochrome; mTOR: mammalian target of rapamycin; VNTR: variable number tandem repeat; cAMP/PKA: cyclic adenosine monophosphate/protein kinase A pathway
{"title":"Clock genes and gastric cancer","authors":"S. Cui, Yuanyuan Chen, Yunfei Guo, Dahu Chen","doi":"10.1080/09291016.2021.2020993","DOIUrl":"https://doi.org/10.1080/09291016.2021.2020993","url":null,"abstract":"ABSTRACT The mental, physical and behavioural changes that follow a 24-hour cycle are defined as circadian rhythms, and this response to light and dark affects most living things, including animals, plants and microbes. Biological clocks are composed of specific molecules (clock genes) that interact with cells throughout the body and are the timing devices that organisms use to regulate circadian rhythms. Circadian rhythms have been observed in the human gastrointestinal tract. To this end, basal gastric acid production, epithelial cell proliferation, gastrointestinal motility and appetite regulation vary with the time of day. The abnormal expression of clock genes can alter normal circadian rhythms and subsequently cause a variety of illnesses, including cancers. The aim of this study was to discuss and summarize the relationship between the expression of clock genes and the development and progression of gastric cancer and to explore the possibility of using these genes as biomarkers in gastric cancer prognosis in patients. Abbreviations: RORE: retinoic acid-related orphan receptor response element; CLOCK: circadian locomotor output cycles kaput; BMAL1: brain and muscle ARNT-like protein 1; ARNTL: aryl hydrocarbon receptor nuclear translocator-like; PER: period; CRY: cryptochrome; mTOR: mammalian target of rapamycin; VNTR: variable number tandem repeat; cAMP/PKA: cyclic adenosine monophosphate/protein kinase A pathway","PeriodicalId":9208,"journal":{"name":"Biological Rhythm Research","volume":"53 1","pages":"1720 - 1734"},"PeriodicalIF":1.1,"publicationDate":"2022-01-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44820468","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-01-01DOI: 10.1080/09291016.2021.1929673
Erin I McDonnell, Vadim Zipunnikov, Jennifer A Schrack, Jeff Goldsmith, Julia Wrobel
By collecting data continuously over 24 hours, accelerometers and other wearable devices can provide novel insights into circadian rhythms and their relationship to human health. Existing approaches for analyzing diurnal patterns using these data, including the cosinor model and functional principal components analysis, have revealed and quantified population-level diurnal patterns, but considerable subject-level variability remained uncaptured in features such as wake/sleep times and activity intensity. This remaining informative variability could provide a better understanding of chronotypes, or behavioral manifestations of one's underlying 24-hour rhythm. Curve registration, or alignment, is a technique in functional data analysis that separates "vertical" variability in activity intensity from "horizontal" variability in time-dependent markers like wake and sleep times; this data-driven approach is well-suited to studying chronotypes using accelerometer data. We develop a parametric registration framework for 24-hour accelerometric rest-activity profiles represented as dichotomized into epoch-level states of activity or rest. Specifically, we estimate subject-specific piecewise linear time-warping functions parametrized with a small set of parameters. We apply this method to data from the Baltimore Longitudinal Study of Aging and illustrate how estimated parameters give a more flexible quantification of chronotypes compared to traditional approaches.
{"title":"Registration of 24-hour accelerometric rest-activity profiles and its application to human chronotypes.","authors":"Erin I McDonnell, Vadim Zipunnikov, Jennifer A Schrack, Jeff Goldsmith, Julia Wrobel","doi":"10.1080/09291016.2021.1929673","DOIUrl":"https://doi.org/10.1080/09291016.2021.1929673","url":null,"abstract":"<p><p>By collecting data continuously over 24 hours, accelerometers and other wearable devices can provide novel insights into circadian rhythms and their relationship to human health. Existing approaches for analyzing diurnal patterns using these data, including the cosinor model and functional principal components analysis, have revealed and quantified population-level diurnal patterns, but considerable subject-level variability remained uncaptured in features such as wake/sleep times and activity intensity. This remaining informative variability could provide a better understanding of chronotypes, or behavioral manifestations of one's underlying 24-hour rhythm. Curve registration, or alignment, is a technique in functional data analysis that separates \"vertical\" variability in activity intensity from \"horizontal\" variability in time-dependent markers like wake and sleep times; this data-driven approach is well-suited to studying chronotypes using accelerometer data. We develop a parametric registration framework for 24-hour accelerometric rest-activity profiles represented as dichotomized into epoch-level states of activity or rest. Specifically, we estimate subject-specific piecewise linear time-warping functions parametrized with a small set of parameters. We apply this method to data from the Baltimore Longitudinal Study of Aging and illustrate how estimated parameters give a more flexible quantification of chronotypes compared to traditional approaches.</p>","PeriodicalId":9208,"journal":{"name":"Biological Rhythm Research","volume":"53 8","pages":"1299-1319"},"PeriodicalIF":1.1,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/09291016.2021.1929673","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9552936","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-12-13DOI: 10.1080/09291016.2021.2016131
J. Abecia, S. Luís, F. Canto, J. Plaza, C. Palacios
ABSTRACT Subcutaneous bio-loggers were used to monitor temperature (T), heart rate (HR), and activity (ACT) of eight ewes managed under intensive housing conditions (permanent stabling and fed once per day). Animals were fed barley straw ad libitum and 0.45 kg concentrate per ewe per day at 08:00 h. Ewes received a surgically implanted bio-logger programmed to record data every 30 min for 12 d. Mean (±SE) T was lower (P < 0.001) in the day (37.88 ± 0.01°C) than at night (38.14 ± 0.01°C), and maximum T occurred at 23:00 h (38.31°C) and minimum T at 08:00 h (37.36°C), immediately after food distribution; however, mean HR (74.41 ± 0.49 bpm) and ACT (15.10 ± 0.30 mg) were higher (P < 0.001) in the day than at night (66.42 ± 0.38 bpm and 6.56 ± 0.22 mg, respectively); maximum HR (87.71 bpm) occurred at 09:30 h, and maximum ACT at 10:00 h (28.47 mg). The cosinor curves for T, HR, and ACT of the eight ewes fit a 24-h rhythm (P < 0.0001). In conclusion, ewes permanently housed presented a clear T, HR and ACT 24-h circadian rhythmicity, whose peaks were coincident with feeding time of the grain-based concentrate.
{"title":"Using subcutaneous bio-loggers to monitor circadian rhythmicity of temperature, heart rate and activity in sheep under intensive housing conditions","authors":"J. Abecia, S. Luís, F. Canto, J. Plaza, C. Palacios","doi":"10.1080/09291016.2021.2016131","DOIUrl":"https://doi.org/10.1080/09291016.2021.2016131","url":null,"abstract":"ABSTRACT Subcutaneous bio-loggers were used to monitor temperature (T), heart rate (HR), and activity (ACT) of eight ewes managed under intensive housing conditions (permanent stabling and fed once per day). Animals were fed barley straw ad libitum and 0.45 kg concentrate per ewe per day at 08:00 h. Ewes received a surgically implanted bio-logger programmed to record data every 30 min for 12 d. Mean (±SE) T was lower (P < 0.001) in the day (37.88 ± 0.01°C) than at night (38.14 ± 0.01°C), and maximum T occurred at 23:00 h (38.31°C) and minimum T at 08:00 h (37.36°C), immediately after food distribution; however, mean HR (74.41 ± 0.49 bpm) and ACT (15.10 ± 0.30 mg) were higher (P < 0.001) in the day than at night (66.42 ± 0.38 bpm and 6.56 ± 0.22 mg, respectively); maximum HR (87.71 bpm) occurred at 09:30 h, and maximum ACT at 10:00 h (28.47 mg). The cosinor curves for T, HR, and ACT of the eight ewes fit a 24-h rhythm (P < 0.0001). In conclusion, ewes permanently housed presented a clear T, HR and ACT 24-h circadian rhythmicity, whose peaks were coincident with feeding time of the grain-based concentrate.","PeriodicalId":9208,"journal":{"name":"Biological Rhythm Research","volume":"53 1","pages":"1711 - 1719"},"PeriodicalIF":1.1,"publicationDate":"2021-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46703138","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-12-09DOI: 10.1080/09291016.2021.2014083
R. Norbury
ABSTRACT Diurnal preference for evening time has been associated with poorer physical and mental health outcomes. In the current report, perceived loneliness and brain structure (hippocampal and amygdala volumes) were compared in a large (N = 4684) sample of morning- and evening-type individuals. Definite eveningness was associated with increased odds for reporting self-perceived loneliness and lonely evening-types had significantly smaller right hippocampal volume as compared to morning and more socially connected evening types. These data add to the mounting body of evidence linking an evening profile with increased risk for psychiatric disorder.
{"title":"Night Owls and Lone Wolves","authors":"R. Norbury","doi":"10.1080/09291016.2021.2014083","DOIUrl":"https://doi.org/10.1080/09291016.2021.2014083","url":null,"abstract":"ABSTRACT Diurnal preference for evening time has been associated with poorer physical and mental health outcomes. In the current report, perceived loneliness and brain structure (hippocampal and amygdala volumes) were compared in a large (N = 4684) sample of morning- and evening-type individuals. Definite eveningness was associated with increased odds for reporting self-perceived loneliness and lonely evening-types had significantly smaller right hippocampal volume as compared to morning and more socially connected evening types. These data add to the mounting body of evidence linking an evening profile with increased risk for psychiatric disorder.","PeriodicalId":9208,"journal":{"name":"Biological Rhythm Research","volume":"53 1","pages":"1702 - 1710"},"PeriodicalIF":1.1,"publicationDate":"2021-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48230624","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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