Table 3.

Sleep variables of the first sleep cyclea

PretrainingPost-trainingp
Sleep latency (min)12.7 ± 5.156.7 ± 2.370.087
NREM stage 1 (%)14.4 ± 5.0010.5 ± 2.950.457
NREM stage 2 (%)35.7 ± 5.2439.0 ± 4.560.522
Slow-wave sleep (%)41.0 ± 6.9240.6 ± 5.950.945
REM sleep (%)8.9 ± 2.749.9 ± 2.160.753
WASO (min)0.5 ± 0.232.6 ± 1.660.172
  • aData are mean ± SEM. Latency to sleep onset (sleep latency) corresponds to the latency to the first sleep stage 2 from lights off. The percentage distributions of sleep stages were calculated based on total sleep time (total NREM and REM sleep stages). No significant differences were found between pretraining and post-training sleep sessions in any of the sleep variables (paired t test).

  • WASO, Waking after sleep onset.