Table 1.
Crude physical activity levels stratified by gender and grade
| 1 st grade | 2 nd grade | 3 rd grade | 4 th grade | 5 th grade | |
|---|---|---|---|---|---|
| Total | n=207 | n=234 | n=264 | n=244 | n=239 |
| Mean counts/min | 651 (122) | 598 (131) | 563 (121) | 550 (138) | 524 (151) |
| Sedentary (min) | 447 (39) | 473 (44) | 497 (44) | 518 (46) | 536 (53) |
| Light (min | 256 (28) | 249 (30) | 237 (31) | 225 (30) | 219 (33) |
| Moderate (min) | 47 (10) | 44 (10) | 42 (11) | 40 (11) | 38 (11) |
| Vigorous (min) | 25 (9) | 23 (10) | 23 (9) | 24 (11) | 23 (11) |
| Boys | n=94 | n=108 | n=140 | n=108 | n=110 |
| Mean counts/min | 689 (115) | 628 (140) | 598 (119) | 610 (144) | 590 (165) |
| Sedentary (min) | 443 (41) | 469 (45) | 497 (46) | 505 (51) | 518 (56) |
| Light (min | 255 (27) | 245 (31) | 235 (32) | 228 (32) | 224 (34) |
| Moderate (min) | 52 (10) | 48 (11) | 46 (10) | 47 (11) | 44 (12) |
| Vigorous (min) | 28 (9) | 26 (11) | 26 (10) | 28 (11) | 28 (12) |
| Girls | n=113 | n=126 | n=124 | n=136 | n=129 |
| Mean counts/min | 620 (119) | 573 (116) | 524 (112) | 502 (112) | 468 (112) |
| Sedentary (min) | 451 (119) | 477 (44) | 498 (42) | 529 (39) | 552 (45) |
| Light (min | 257 (29) | 253 (29) | 239 (29) | 223 (28) | 214 (30) |
| Moderate (min) | 42 (9) | 40 (9) | 36 (9) | 36 (8) | 33 (8) |
| Vigorous (min) | 22 (8) | 21 (8) | 19 (8) | 20 (8) | 19 (9) |
Data are mean +/- SD. Minutes in PA intensity intervals are minutes/day. Grade refers to children’s grade when measured the first time in the winter in 2009/10.