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Poor sleep is linked to weight gain and obesity from "summary" of Why We Sleep by Matthew Walker
Insufficient sleep is associated with an increased risk of weight gain and obesity. The reasons for this are multifaceted and revolve around the impact of sleep on our hormones, metabolism, and behavior. One key hormone that is influenced by sleep is leptin, which acts as a signal to the brain that we have had enough to eat. When we are sleep deprived, leptin levels decrease, leading to an increase in hunger and a greater likelihood of overeating. Conversely, another hormone called ghrelin, which stimulates appetite, becomes more active with inadequate sleep. This double whammy of reduced leptin and increased ghrelin creates a perfect storm for weight gain. Furthermore, sleep deprivation disrupts the body's ability to regulate blood sugar levels, making it more likely to develop insulin resistance and ultimately, obesity. In addition to hormonal changes, poor sleep can also alter our food choices and eating patterns. When we are tired, we tend to reach for high-calorie, high-carb foods that provide a quick energy boost. This can lead to a cycle of poor dietary choices and weight gain. Moreover, sleep deprivation impairs the prefrontal cortex, the part of the brain responsible for decision-making and impulse control. This can further contribute to unhealthy eating habits and weight gain. Furthermore, insufficient sleep can impact our physical activity levels. When we are tired, we are less likely to exercise or engage in physical activity, which can further exacerbate weight gain. The combination of hormonal changes, altered food choices, impaired decision-making, and reduced physical activity creates a perfect storm for weight gain and obesity in individuals who do not get enough sleep.- The relationship between poor sleep and weight gain is complex and multifaceted. By understanding how sleep influences our hormones, metabolism, and behavior, we can appreciate the significant impact that insufficient sleep can have on our weight and overall health. Prioritizing good sleep hygiene and ensuring an adequate amount of rest each night is crucial in preventing weight gain and obesity.
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