A longitudinal analysis of COVID-19 lockdown stringency on sleep and resting heart rate measures across 20 countries

AbstractLockdowns imposed to stem the spread of COVID-19 massively disrupted the daily routines of many worldwide, but studies to date have been mostly confined to observations within a limited number of countries, based on subjective reports and surveys from specific time periods during the pandemic. We investigated associations between lockdown stringency and objective sleep and resting-heart rate measures in ~ 113,000 users of a consumer sleep tracker across 20 countries from Jan to Jul 2020, compared to an equivalent period in 2019. With stricter lockdown measures, midsleep times were universally delayed, particularly on weekdays, while midsleep variability and resting heart rate declined. These shifts (midsleep: + 0.09 to + 0.58 h; midsleep variability: − 0.12 to − 0.26 h; resting heart rate: − 0.35 to − 2.08 bpm) correlated with the severity of lockdown across different countries (all Ps < 0.001) and highlight the graded influence of stringency lockdowns on human physiology.

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A Longitudinal Analysis of COVID-19 Lockdown Stringency on Sleep and Resting Heart Rate Measures Across 20 Countries

10.21203/rs.3.rs-331447/v1 ◽

2021 ◽

Author(s):

Ju Lynn Ong ◽

TeYang Lau ◽

Mari Karsikas ◽

Hannu Kinnunen ◽

Michael W.L. Chee

Keyword(s):

Heart Rate ◽

Human Physiology ◽

Social Isolation ◽

Longitudinal Analysis ◽

Resting Heart Rate ◽

Specific Time ◽

Daily Routines ◽

Time Periods ◽

Subjective Reports

Abstract Lockdowns imposed to stem the spread of COVID-19 massively disrupted the daily routines of many worldwide, but studies to date are mostly confined to observations within a limited number of countries, based on subjective reports and survey from specific time periods during the pandemic. We investigated associations between lockdown stringency and objective sleep and resting-heart rate measures in 113,000 users of a consumer sleep tracker across 20 countries from Jan-Jul 2020. With stricter lockdown measures, midsleep times were universally delayed, particularly on weekdays, while midsleep variability and resting heart rate declined. These shifts (midsleep: +0.09 to +0.58 hours; midsleep variability: –0.12 to –0.26 hours; resting heart rate: –0.35 to –2.08 bpm) correlated with the severity of lockdown across different countries and highlight the graded influence of mobility restriction and social isolation on human physiology.

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A Longitudinal Analysis of COVID-19 Lockdown Stringency on Sleep and Resting Heart Rate Measures across 20 Countries

10.1101/2021.03.15.21253668 ◽

2021 ◽

Author(s):

Ju Lynn Ong ◽

TeYang Lau ◽

Mari Karsikas ◽

Hannu Kinnunen ◽

Michael W.L. Chee

Keyword(s):

Heart Rate ◽

Human Physiology ◽

Social Isolation ◽

Longitudinal Analysis ◽

Resting Heart Rate ◽

Specific Time ◽

Daily Routines ◽

Time Periods ◽

Subjective Reports

Lockdowns imposed to stem the spread of COVID-19 massively disrupted the daily routines of many worldwide, but studies to date are mostly confined to observations within a limited number of countries, based on subjective reports and survey from specific time periods during the pandemic. We investigated associations between lockdown stringency and objective sleep and resting-heart rate measures in 113,000 users of a consumer sleep tracker across 20 countries from Jan-Jul 2020. With stricter lockdown measures, midsleep times were universally delayed, particularly on weekdays, while midsleep variability and resting heart rate declined. These shifts (midsleep: +0.09 to +0.58 hours; midsleep variability: -0.12 to -0.26 hours; resting heart rate: -0.35 to -2.08 bpm) correlated with the severity of lockdown across different countries and highlight the graded influence of mobility restriction and social isolation on human physiology.

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Physiological work areas in professional beach volleyball players during competition matches (Zonas de trabajo en jugadores profesionales de vóley playa: Un caso de estudio)

Retos ◽

10.47197/retos.v0i31.44002 ◽

2016 ◽

pp. 94-97

Author(s):

José Manuel Jimenez Olmedo ◽

Basilio Pueo ◽

Alfonso Penichet Tomás ◽

Juan José Chinchilla Mira ◽

José Antonio Perez Turpin

Keyword(s):

Heart Rate ◽

Specific Time ◽

International Training ◽

National Team ◽

Notational Analysis ◽

Analysis Tools ◽

Volleyball Players ◽

Specific Position ◽

Time Periods

In this paper, physiological areas of professional beach volleyball players are identified by combining notational analysis tools together with in-sync heart rate capture for specific time periods in competition games. The aim is to identify workload areas depending on the player´s position as well as the changes these areas undergo during real competitions. To this end, a case study is quantitatively analyzed and based on the Spanish National Team during the First International Training Tournament «Sixto Jimenez» played in Tenerife (Spain). Workload ranges differ between blocker player (from 77.71% to 89.13%) and defensive player (from 66.16% to 77.77%), both values are related to their individual HRmax. Furthermore, median HRmax values indicate that blocker player must support an increased workload of 84.78% compared to 71.71% of the defending player. Therefore, the specific position of the defenders established significant differences in their physiological responsesResumen: En este artículo, se identifican las zonas de trabajo fisiológicas de los jugadores profesionales de vóley playa mediante la combinación de herramientas de análisis notacional junto con la captura sincronizada de la frecuencia cardíaca durante períodos de tiempo específicos en partidos de competición. El objetivo es identificar las áreas de trabajo en función de la posición del jugador, así como los cambios que experimentan durante las competiciones reales. Para ello, se analiza un caso de estudio cuantitativamente del equipo español durante el I Torneo Internacional de Entrenamiento Sixto Jiménez, disputado en Tenerife (España). Los rangos de carga de trabajo difieren entre el jugador bloqueador con 77,71% a 89,13% y el jugador defensor con 66,16% a 77,77%, ambos valores relacionados con su FCmáx. Por otra parte, los valores medios de FCmáx indican que el jugador bloqueador debe soportar una mayor carga de trabajo del 84,78% con respecto al 71,71% del jugador defensor. Por lo tanto, la posición específica del jugador defensor estableció diferencias significativas en sus respuestas fisiológicas.

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Regional Frontal Lobe Response Magnitudes During Affective Shifting Covary With Resting Heart Rate Variability in Healthy Volunteers

Journal of Psychophysiology ◽

10.1027/0269-8803/a000166 ◽

2016 ◽

Vol 30 (4) ◽

pp. 165-174 ◽

Cited By ~ 3

Author(s):

Ryan Smith ◽

John J.B. Allen ◽

Julian F. Thayer ◽

Richard D. Lane

Keyword(s):

Heart Rate ◽

Heart Rate Variability ◽

Healthy Subjects ◽

Emotional Reactivity ◽

Bold Signal ◽

Resting Heart Rate ◽

Functional Magnetic Resonance ◽

Absolute Value ◽

Cardiac Vagal Control ◽

Resting Heart Rate Variability

Abstract. We hypothesized that in healthy subjects differences in resting heart rate variability (rHRV) would be associated with differences in emotional reactivity within the medial visceromotor network (MVN). We also probed whether this MVN-rHRV relationship was diminished in depression. Eleven healthy adults and nine depressed subjects performed the emotional counting stroop task in alternating blocks of emotion and neutral words during functional magnetic resonance imaging (fMRI). The correlation between rHRV outside the scanner and BOLD signal reactivity (absolute value of change between adjacent blocks in the BOLD signal) was examined in specific MVN regions. Significant negative correlations were observed between rHRV and average BOLD shift magnitude (BSM) in several MVN regions in healthy subjects but not depressed subjects. This preliminary report provides novel evidence relating emotional reactivity in MVN regions to rHRV. It also provides preliminary suggestive evidence that depression may involve reduced interaction between the MVN and cardiac vagal control.

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