Ask Onix
Perception of sleep quality linked to next-day energy levels
Feeling groggy after a restless night may have less to do with actual sleep duration and more with how you interpret your rest, according to emerging research. Scientists suggest that mindset, mood, and daily activities influence whether people feel refreshed-regardless of objective sleep measurements.
Beyond objective sleep metrics
Nicole Tang, director of the Warwick Sleep and Pain Lab at the University of Warwick, challenges the assumption that sleep quality is solely determined by nighttime performance. "Most people believe sleep quality is measurable through physical rest," she says. "But what happens before and after sleep-including our perceptions-plays a significant role."
Tang's work aligns with a growing body of evidence indicating that uninterrupted sleep isn't the only factor in feeling rested. Psychological processes, such as attention and beliefs about sleep, often drive insomnia by keeping individuals in a heightened state of arousal.
The paradox of perceived poor sleep
For decades, researchers have studied "paradoxical insomnia," where individuals report fatigue despite objective sleep data showing normal patterns. Studies estimate this phenomenon affects between 8% and 66% of insomnia cases. While chronic sleep deprivation carries real health risks, experts argue that rigid beliefs about sleep-such as needing a fixed number of hours-may exacerbate fatigue.
David Samson, an evolutionary anthropologist at the University of Toronto, notes that industrialized societies often pathologize sleep. His research on hunter-gatherer communities in Namibia and Bolivia reveals they sleep 5.7 to 7.1 hours nightly-less than many Westerners-yet report high satisfaction with their rest. "We've created a narrative that humans are more sleep-deprived than ever," Samson says. "It's not supported by evidence."
How mindset influences fatigue
Jason Ong, director of behavioral sleep medicine at Nox Health, explains that people with insomnia often fixate on sleep duration, amplifying anxiety. "It's not just the belief that they need eight hours-it's how tightly they cling to it," he says. Mindfulness-based approaches, which encourage detachment from such thoughts, have shown promise in breaking this cycle.
Sleep tracking devices may inadvertently worsen fatigue. In one study, participants given false feedback about their sleep reported matching energy levels-those told they slept poorly felt more tired, even if their sleep was normal. Similarly, a lab experiment found that reaction times improved when participants believed they'd slept well, regardless of actual sleep duration.
Practical strategies for better rest
Experts recommend maintaining good sleep hygiene-avoiding caffeine, keeping a consistent bedtime-but also adopting a flexible mindset. Pamela Douglas, founder of the Possums sleep intervention, advises new parents to avoid clock-watching. "Tracking hours can increase stress," she says.
Tang suggests focusing on mood-boosting activities in the morning to improve perceptions of sleep quality. Recognizing that natural awakenings are normal may also reduce frustration. "Sleep is highly individual," she says. "Overemphasizing duration creates unrealistic expectations and unnecessary guilt."
A balanced approach
While sleep is critical for health, researchers caution against toxic positivity. "We're not suggesting people ignore poor sleep," Tang clarifies. "But understanding its nuances can help mitigate unnecessary distress."
"The way we think about sleep can change even after the night is over," Tang notes. "Engaging in enjoyable activities may shift perceptions of rest."
