Table 1.
Participant characteristics.
| N = 45 | |
|---|---|
| Age, y | 20.2 ± 1.1 |
| Height, cm | 162.0 ± 5.7 |
| Weight, kg | 56.1 ± 5.7 |
| BMI, kg/m2 | 21.4 ± 1.6 |
| Age at first menstruation, y | 12.6 ± 1.7 |
| Menstrual cycle, days | 28.2 ± 3.7 |
| Duration of menses, days | 5.8 ± 1.0 |
| Type of sports | |
| Soccer (%) | 15 (33.3) |
| Track and field (%) | 12 (26.7) |
| Kendo (%) | 9 (20.0) |
| Basketball, % | 8 (17.8) |
| Softball, % | 1 (2.2) |
| PSQI score | 4.5 ± 1.8 |
| % of athletes with poor sleep quality, % | 13 (28.9) |
| ESS score | 10.3 ± 3.3 |
| % of athletes with sleepiness (%) | 21 (46.7) |
Continuous data are summarized using the mean ± standard deviation. BMI = body mass index, ESS = Epworth Sleepiness Scale, PSQI = Pittsburgh Sleep Quality Index.