Silja Martikainen

TL;DR: Increased MTNR1B expression in human islets from risk G-allele carriers is demonstrated, which likely leads to a reduction in insulin release, increasing T2D risk and supporting a model where enhanced melatonin signaling in islets reduces insulin secretion, leading to hyperglycemia and greater future risk of T1D.

TL;DR: The relationship between a higher level of PA and poorer sleep is bidirectional, and within-person findings challenge epidemiological findings showing that more active people report better sleep.

TL;DR: In adolescent girls, poor sleep quality was only weakly associated with poorer executive functioning, while in boys, poorer sleep quantity and quality were associated with an inattentive pattern of executive functioning.

TL;DR: Sleep in early adolescence can be anticipated from childhood sleep patterns and disorders, but is not associated with pubertal maturity, although sleep duration becomes shorter, sleep quality may improve during early adolescence.

TL;DR: In this article, the authors examined whether objectively measured daytime physical activity was associated with diurnal hypothalamic-pituitary-adrenocortical axis (HPAA) activity and HPAA responses to psychosocial stress.