Table 3.
Physical activity, sedentary behaviour, sleep duration and cardio-respiratory fitness at weekdays and weekend days at three seasons in 8–11 year old Danish children
|
Variables |
n |
|
Autumn |
|
|
Winter |
|
|
Spring |
|
|---|---|---|---|---|---|---|---|---|---|---|
| Weekday | Weekend | Ratio5 | Weekday | Weekend | Ratio5 | Weekday | Weekend | Ratio5 | ||
| Sedentary time (min/d) |
635 |
467 ± 66 |
488 ± 88** |
1.05 |
477 ± 61 |
509 ± 82** |
1.07 |
459 ± 67 |
481 ± 94** |
1.06 |
| Screen-time (min/d)1 |
704 |
120 (80;165) |
210 (135;300)** |
|
|
|
|
|
|
|
| Screen-time (≤2 h/d)1,2 |
704 |
46% |
17%** |
|
|
|
|
|
|
|
| Total PA (cpm) |
635 |
507 (417;614) |
400 (295;514)** |
0.84a |
464 (388;566) |
347 (259;441)** |
0.78b |
555 (450;671) |
460 (331;635)** |
0.92c ** |
| MVPA (min/d) |
635 |
50 (34;71) |
28 (16;47)** |
0.68a |
46 (32;66) |
24 (12;39)** |
0.63a |
56 (38;78) |
40 (21;62)** |
0.83b ** |
| MVPA (≥1 h/d)3 |
635 |
37% |
15%** |
0.41 |
33% |
9%** |
0.28 |
45% |
27%** |
0.60 * |
| Sleep duration (min/night)4 | 523 | 559 ± 28 | 549 ± 48** | 0.99 | 554 ± 31 | 549 ± 48* | 1.00 | 543 ± 32 | 536 ± 55* | 0.99 |
Abbreviations:PA Physical activity, MVPA Moderate-to-vigorous physical activity.
Data are presented as mean ± standard deviation or median (interquartile range) tested by student t-test or one-way ANOVA with post-hoc Bonferroni test (non-normal distributed data were transformed before analysis) or proportions (%) tested by Chi-square test. *, P < 0.05; **, P < 0.001. Different superscripts in a row (a,b,c) indicate significant difference (P ≤0.05).
1Only measured at baseline.
2Screen time recommendations [23].
3Physical activity recommendations [17].
4Boys were sleeping 12, 11 and 13 min/night less during weekend days compared to weekdays in autumn, winter and spring (P < 0.001). Girls were not sleeping less during weekend days compared to weekdays (3, -4 and 0 min/night in autumn, winter and spring (P ≥ 0.22).
5Weekend day/weekday-ratio within season.