What is the relationship between sleep quality and health?

The correct response highlights the significant impact that poor sleep can have on both physical and mental health outcomes. Scientific research consistently demonstrates that inadequate or low-quality sleep is associated with a variety of health issues.

For physical health, insufficient sleep is linked to conditions such as obesity, diabetes, cardiovascular disease, and a weakened immune system. In terms of mental health, poor sleep can contribute to anxiety, depression, and overall mood disturbances. By undermining both physical and mental well-being, poor sleep can lead to a cycle whereby health issues further disrupt sleep patterns, exacerbating the situation.

In contrast, the other options diverge from this understanding. While poor sleep is often thought to enhance cognitive function, it actually impairs it, leading to decreased attention, memory issues, and decision-making difficulties. Good sleep, on the other hand, plays a critical role in maintaining and improving physical health, thus contradicting any notion that there is no relationship. Additionally, the idea that poor sleep promotes better mental health is fundamentally flawed, as evidence shows that sleep disturbances typically exacerbate mental health problems rather than alleviate them.