ABSTRACT
Objectives: To evaluate how sleep quality predicts the trait aspect of mental and physical energy
versus fatigue within a healthy non-obese adult population.
Material and Methods: A study population of 495 adults completed an online survey concerning trait energy
and fatigue as well as sleep quality. Bivariate and adjusted analysis examined whether
sleep quality, measured from the Pittsburgh sleep quality instrument, associated with
physical and mental trait energy and fatigue (4 separate constructs). Adjusted analysis
included caffeine consumption, polyphenol consumption, current mood, perceived mental
workload, and physical activity.
Results: Bivariate analysis showed that both physical and mental fatigue were associated with
sleep quality, while physical and mental energy were not. However, after adjustment
for potential confounders, sleep quality was associated with mental fatigue and physical
energy (not physical fatigue).
Conclusion: Findings suggest that improvement in sleep quality among healthy young adults may
affect certain aspects of physical versus mental energy and fatigue more strongly
than others.
Keywords:
Fatigue - Sleep - Affect