Table 2.

Sleep stage distribution

30 min group4 h groupP
TST (min)428.50 ± 6.61432.70 ± 3.49>0.50
Wake (%)2.98 ± 1.440.76 ± 0.38>0.15
S1 (%)0.97 ± 0.321.04 ± 0.20>0.80
S2 (%)58.21 ± 2.1261.45 ± 1.82>0.25
SWS (%)15.29 ± 0.8713.53 ± 1.75>0.35
REM sleep (%)20.88 ± 0.7120.98 ± 1.12>0.90
  • Means ± SEMs are shown. Total sleep time (TST) is indicated in minutes with sleep stage 1 (S1), sleep stage 2 (S2), slow-wave sleep (SWS, combined sleep stages 3 and 4), and REM sleep as percentage of total sleep time for the sleep condition of the 30 min and 4 h groups, respectively. p values refer to pairwise group comparisons.