Jagiellonian University study finds sleep deprivation effects persist for seven days

Researchers from Jagiellonian University in Krakow have conducted a study published in ‘PLOS ONE’ regarding the recovery period required after chronic sleep deprivation. The experiment involved participants who reduced their sleep by approximately 30 percent for 10 days following a period of healthy sleep hygiene. The findings indicate that the physiological and cognitive traces of sleep deficiency can persist for up to seven days even after the individual returns to a normal sleep schedule.

Using EEG to monitor brain activity and concentration tasks such as the Stroop test, the study aimed to simulate the chronic sleep deficits common in Western societies and high-alert professions like the military.

In addition to the effects of deprivation, medical understanding of sleep involves distinct stages: NREM (comprising stages N1, N2, and N3) and REM. NREM sleep transitions from light sleep (N1) to deep sleep (N3), which dominates the first half of the night, while REM and N2 stages become more prevalent toward morning. Sleep quality is determined by both duration and continuity, regulated by circadian rhythms and homeostatic pressure.