Table 4.
Sleep diary variables of the night following the experimental procedures
| Variable | S8 (N = 23) |
S5 (N = 24) |
HIITS8 (N = 21) |
HIITS5 (N = 24) |
P |
|---|---|---|---|---|---|
| TIB (h)*,‡ | 8.74 (0.40) | 6.0 (0.66) | 8.74 (0.40) | 5.9 (0.67) | <0.001* |
| TST (h)*,§ | 8.09 (0.30) | 5.4 (0.54) | 7.96 (0.39) | 5.20 (0.19) | <0.001* |
| SOL (min)†,‖ | 14.22 (7.00) | 8.50 (5.92) | 15.62 (12.37) | 12.29 (7.03) | 0.027* |
| AWK (number)† | 1.09 (1.41) | 0.96 (1.12) | 0.76 (1.00) | 0.33 (0.70) | 0.065 |
| WASO (min)† | 5.04 (7.02) | 3.25 (4.98) | 4.29 (7.91) | 2.02 (5.26) | 0.078 |
| SE (%)* | 92.58 (3.86) | 89.93 (5.90) | 91.08 (5.38) | 88.35 (7.75) | 0.102 |
N = 92; *p < 0.05. Data are presented as Mean (SD).
Groups; S8: average sleep opportunity; S5: sleep restriction; HIITS8: HIIT plus average sleep; and HIITS5: HIIT plus sleep restriction.
HIIT: high-intensity interval training; TIB: time in bed; TST: total sleep time is the amount of sleep duration between the time in bed and time out of bed; AWK: number of awakenings after sleep onset; SOL: sleep onset latency; SE: sleep efficiency is the percent of the time asleep out of the amount of time spent in bed; WASO: wake after sleep onset.
*One-way analysis of variance (ANOVA).
†Kruskal–Wallis test.
‡TIB: Significantly different between S5 & S8; HITS5 & HITS8; S8 & HITS5 (all, p < 0.001).
§TST: Significantly different between S5 & S8; HITS5 & HITS8; S8 & HITS5 (all, p < 0.001).
‖SOL: Significantly different between S8 & S5 (p = 0.026); and between S5 & HITS8 (p = 0.031).