Science News · Wetenschap

To nap or not to nap? Science is still waking up to the question

While scientists have traditionally focused on monophasic sleep, emerging research suggests that segmented sleep patterns, including naps, may be as important as the total duration of sleep. This shift in focus is driven by the reality that many people worldwide struggle to achieve the recommended seven to nine hours of sleep in a single block due to various lifestyle and environmental factors.

Many cultures, such as in Oman, incorporate segmented sleep, with people waking for early prayers and returning to sleep or napping later. This pattern is also common among teenagers, new parents, menopausal women, the elderly, night owls, shift workers, and those in hot climates. Despite the prevalence of napping, scientific research has largely concentrated on continuous sleep, overlooking the nuances of how sleep is divided throughout a 24-hour period.

Researchers are calling for a more nuanced understanding of naps, recognizing their variability in duration, timing, frequency, and societal impact. Treating all naps uniformly has led to conflicting research findings, making it difficult to provide clear advice to the public. While splitting sleep could theoretically help individuals meet their sleep needs, the long-term health implications of such fragmented sleep remain unclear.

Historically, segmented sleep was common, with medieval Europeans often engaging in a "two-sleep" pattern, waking in the middle of the night for various activities before returning to sleep. This biphasic pattern is less compatible with modern life, characterized by electric lighting and screen use. However, the chronic sleep deprivation prevalent in industrialized nations, linked to numerous health issues, prompts a re-examination of sleep patterns.

The science behind daytime napping is complex. While short naps (under 30 minutes) are linked to improved alertness, longer or frequent naps may negatively impact health. Research on longer naps is particularly mixed. Some studies suggest they are linked to increased obesity and blood sugar levels, while others, like those involving elite athletes, indicate that longer naps might be beneficial for specific aspects of performance, such as memory consolidation or exercise recovery.

Ultimately, sleep advice needs to become more personalized. Factors such as genetic predisposition for napping, motivation, cultural environment, and seasonality should be considered. Instead of a one-size-fits-all recommendation, sleep science should focus on helping individuals who cannot achieve continuous sleep to meet their sleep needs through tailored strategies.

AI-samenvatting op basis van de bron.