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Menstrual variations of sleep-wake rhythms in healthy women.
Sleep Biol Rhythms
January 2025
Laboratory of Animal Physiology, School of Agriculture, Meiji University, 1-1-1 Higashimita, Tama-Ku, Kawasaki, Kanagawa 214-8571 Japan.
The ovarian steroid hormones, estrogen and progesterone, the levels of which fluctuate dynamically with the estrous cycle, alter circadian behavioral rhythms in mammals. However, it remains unclear whether the sleep-wake rhythm fluctuates with the menstrual cycle in humans. To ascertain the relationship between the menstrual cycle and sleep-wake rhythms, we evaluated the objective and long-term sleep-wake rhythms of ten healthy women using a recently developed wearable device.
View Article and Find Full Text PDFTime-of-day effects on physical performance and perceptual responses in Brazilian Jiu-Jitsu athletes.
Chronobiol Int
January 2025
Biomechanics Laboratory, Center of Sports, Federal University of Santa Catarina, Santa Catarina, Brazil.
This study investigated how the time of day affects physical performance and perceptual responses in Brazilian Jiu-Jitsu (BJJ) athletes. Given the significance of circadian rhythms on athletic capabilities, we aimed to determine whether performance variations occur across different times of the day (morning, 10:00-11:00h; afternoon, 14:00-15:00h; and evening, 18:00-19:00h) and if these effects differ by sex. In total, 23 BJJ athletes (9 females, 14 males) participated in this study.
View Article and Find Full Text PDFWeekday-Weekend Differences in Chrononutritional Variables Depend on Urban or Rural Living.
Nutrients
December 2024
Department of Health and Society, School of Public Health, University of São Paulo, São Paulo 01246-904, Brazil.
Background/objectives: Studies have highlighted the impact of work and school schedules on food preferences, suggesting that individuals' dietary choices may change during the week to align with their daily routines. Despite the variation in food composition in the population, there is no evidence identifying differences in food intake times and composition across the days of the week in urban/rural locations. Thus, the study's aim was to identify weekday vs.
View Article and Find Full Text PDFIs the Timing of Eating Relevant for Weight Loss?
Proc Nutr Soc
January 2025
Department of Nutritional Sciences, Faculty of Health and Medical Science, University of Surrey, Guildford, Surrey GU2 7XH, United Kingdom.
The potential influence of the timing of eating on body weight regulation in humans has attracted substantial research interest. This review aims to critically evaluate the evidence on timed eating for weight loss, considering energetic and behavioural components to the timing of eating in humans. It has been hypothesised that timed eating interventions may alter energy balance in favour of weight loss by enhancing energy expenditure, specifically the thermic effect of food.
View Article and Find Full Text PDFCircadian rhythms, metabolism, and nutrition support in critically ill adult patients: a narrative review.
Curr Opin Clin Nutr Metab Care
December 2024
Department of Anesthesia, Critical Care and Pain Medicine, Massachusetts General Hospital.
Purpose Of Review: The human circadian system regulates several physiological processes, including metabolism, which becomes significantly disrupted during critical illness. The common use of 24-h continuous nutrition support feeding in the intensive care unit (ICU) may further exacerbate these disruptions; this review evaluates recent evidence comparing continuous and intermittent feeding schedules in critically ill adults.
Recent Findings: Research comparing different feeding schedules in critically ill adults remains limited.
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