Reacción a "Sleep deprivation is linked to weight gain in adults at cardiometabolic risk"

I find this study, which consists of two clinical trials, particularly compelling. Although the number of participants is relatively small, it clearly demonstrates the biological impact that sleep quality and duration have on health. The study design is especially robust: sleep restriction was objectively measured using wrist-worn actigraphy, with participants reducing their sleep by around 90 minutes per night (in practice, the average reduction was 78 minutes, which could simply reflect those evenings when we go to bed later than usual). Even over this relatively short period, participants gained almost half a kilogram on average. The intervention lasted only six weeks, but if this effect were sustained over time, as the authors suggest, it could amount to around 4 kg of weight gain over the course of a year. We already know that insufficient sleep adversely affects metabolic health. In this trial, in addition to weight gain, participants also experienced a modest increase in waist circumference. The authors suggest that sleeping less leads to increased compensatory sedentary behaviour, as well as hormonal changes, including higher leptin levels associated with increased fat mass. We now understand that metabolic health is closely linked to sleep health. Metabolic health is influenced not only by what we eat and how physically active we are, but also by stress and sleep. This is particularly concerning given the amount of time people now spend using screens, which often reduces the amount of sleep they get. As this study showed, delaying bedtime appears to encourage a more sedentary lifestyle and is also associated with metabolic changes, including increased leptin levels, which may contribute to weight gain. Sleep should no longer be regarded as a passive component of wellbeing, but as an active biological intervention. It should therefore be considered a cornerstone of the clinical management of metabolic disease, overweight, obesity and diabetes. A simple way of summarising these findings is that sleeping less can also make us heavier. Sleep deprivation promotes weight gain through its effects on physical activity and subtle metabolic changes. When managing patients with metabolic disease, overweight or obesity, improving sleep quality should be regarded as an important biological target alongside diet and physical activity.