Table 2.
Sleep variables and energy balance
| Weekday in screening term | Weekend in screening term | Weekend in CON | Weekend in SJL | P value | |
|---|---|---|---|---|---|
| Bedtime, h:m | 0:43 (0:56) | 0:58 (0:58) | 0:36 (1:06) | 3:39 (1:03)a,b,c | 0.014 |
| Awake time, h:m | 7:48 (0:35) | 8:27 (0:52) | 8:11 (1:06) | 10:53 (0:49)a,b,c | < 0.001 |
| Med-sleep time, h:m | 4:15 (0:39) | 4:41 (0:44) | 4:23 (0:58) | 7:16 (0:50)a,b,c | < 0.001 |
| Social jetlag, min | 27 (60) | 8 (47) | 181 (24)b,c | < 0.001 | |
| Sleep duration, min | 368 (49) | 373 (60) | 390 (53) | 377 (58) | 0.588 |
| REM sleep (%) | 20.8 (4.1) | 20.6 (8.1) | 21.2 (7.1) | 21.8 (6.6) | 0.827 |
| Light sleep (%) | 60.7 (5.1) | 60.6 (7.9) | 60.3 (7.6) | 59.2 (8.1) | 0.945 |
| Deep sleep (%) | 18.5 (3.5) | 18.8 (4.2) | 18.5 (3.3) | 19.0 (4.8) | 0.879 |
| Energy expenditure, kcal | 2897 (462) | 2823 (528) | 2885 (528) | 2795 (457) | 0.600 |
| Energy intake, kcal | 2025 (455) | 2049 (686) | 2049 (499) | 2075 (550) | 0.964 |
Values are presented as mean (standard deviation)
REM rapid eye movement
aSignificantly different from weekday in screening term (P < 0.05)
bSignificantly different from weekday in screening term (P < 0.05)
cSignificantly different from the weekend in the control trial (P < 0.05)