Table 1.
Sleep architecture during the nap period (mean ± SD)
| Novice players | Experienced players | |
|---|---|---|
| TSTa | 39.29 ± 11.40 | 49.72 ± 11.06 |
| Stage 1 (min) | 9.79 ± 2.58 | 9.28 ± 2.58 |
| Stage 1 (%) | 27.27 ± 14.54 | 19.18 ± 10.75 |
| Stage 2 (min) | 26.21 ± 12.06 | 29.31 ± 8.97 |
| Stage 2 (%) | 64.87 ± 14.45 | 59.17 ± 14.68 |
| SWS (min) | 3.29 ± 5.87 | 9.47 ± 11.49 |
| SWS (%) | 8.34 ± 14.35 | 18.44 ± 21.83 |
| REM (min) | 0.00 ± 0.00 | 1.16 ± 3.03 |
| REM (%) | 0.00 ± 0.00 | 2.24 ± 5.89 |
aThere were no significant differences between groups on any measure, but there was a trend for total sleep time (TST) to be greater in experienced players (P = 0.052).
Means ± SD. SWS, slow wave sleep stages 3 and 4. %, Percent of TST. Of the nap participants, n = 12 did not enter SWS during the sleep period, and n = 3 were awoken from REM sleep. Due to artifact, the sleep recording for one novice player was unusable.