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Open access Jul 2026

Circadian phenotype is associated with diurnal variation in human exercise performance.

It is demonstrated that endurance exercise performance is enhanced in the evening compared with the morning and suggested that behavioural markers of circadian phenotype are associated with the magnitude of diurnal variation in performance.

A. Singh, Sanjida Ahmed, S. Hesketh · 0 citations
Open access Aug 2026

A preliminary investigation of the relationship between rapid eye movement (REM) sleep and fear inhibition processes in the context of circadian misalignment.

OBJECTIVE Rapid eye movement (REM) sleep is implicated in fear inhibition processes critical for trauma recovery. However, prior experimental models of REM sleep disruption have lacked ecological validity by manipulating sleep without accounting for circadian timing. Circadian misalignment frequently occurs in occupati...

V. Vuong, Elise McGlashan, Sonia Birch et al. · 0 citations
Open access Jul 2026

Effects of acute melatonin and caffeine supplementation on sleepiness and performance in trained runners

The results showed that performance over 1 mile across the three supplementation conditions did not differ, and caution against melatonin for performance, particularly when used outside its sleep-promoting context.

Nádia Esteves dos Santos, B. Franco, V. Sanz-Milone et al. · 0 citations
Open access Jul 2026

The day-to-day bidirectional association of sleep with positive and negative affect in midlife postmenopausal women.

Findings support day-to-day associations between sleep and positive affect rather than negative affect and highlight the potential to enhance positive affect in midlife postmenopausal women through sleep improvement.

Shelby C. Wood, R. Thurston, Yue-Fang Chang et al. · 0 citations
Jul 2026

Relationship of school shifts with sleep patterns and quality, daytime sleepiness, and attention in adolescents living in areas with different urbanization levels.

The phase delay on the sleep-wake cycle resulting from biopsychosocial changes related with adolescence is exacerbated by the level of urbanization. However, early school start times conflict with this delay, leading to several negative consequences. This study aims to compare sleep habits and quality, daytime sleepine...

Z. C. M. Bessa, F. M. C. Diogo, A. M. Câmara et al. · 0 citations
Open access Jul 2026

Sleep disturbances after an ultra-trail endurance race: a field study

Examining sleep patterns in athletes before and after an ultra-trail race found disruptions are characterized by sleep fragmentation and reduced sleep efficiency, which can persist for up to four nights postrace.

Fanny Fachan, Franck Vilcourt, B. Lemarchand et al. · 0 citations

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