Table 2.
Physical activity and sedentary behavior characteristics during classroom in those using a sitting desk versus a stand-biased desk (Mean (SD)).
| MEASURES | Baseline | Post I | Post II | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Sit-Stand | Stand-Sit | P1 | Sit-Stand | Stand-Sit | P2 | Sit-Stand | Stand-Sit | P3 | |
| (n = 39) | (n = 58) | (n = 36) | (n = 47) | (n = 37) | (n = 52) | ||||
| School Day | |||||||||
| Average 30 Min of MVPA a | 25 (64.1%) | 23 (41.1%) | 0.027 | 15 (41.7%) | 19 (40.4%) | 0.909 | 15 (40.5%) | 21 (42.0%) | 0.891 |
| 3rd Grade | 10 (100.0% | 4 (40.0%) | 0.011 | 9 (90.0%) | 6 (66.7%) | 0.303 | 6 (66.7%) | 7 (70.0%) | 1.000 |
| 4th Grade | 8 (61.5%) | 5 (22.7%) | 0.033 | 6 (60.0%) | 10 (52.6%) | 1.000 | 5 (41.7%) | 8 (42.1%) | 0.981 |
| 6th Grade | 7 (43.8%) | 14 (58.3%) | 0.520 | 0 (0.0%) | 3 (15.8%) | 0.234 | 4 (25.0%) | 6 (28.6%) | 1.000 |
| Classroom Time | |||||||||
| Wear Time (min/day) | 237.9 (20.2) | 238.9 (26.3) | 0.522 | 236.2 (34.8) | 241.7 (32.5) | 0.486 | 233.2 (22.0) | 238.8 (26.4) | 0.322 |
| 3rd Grade | 225.6 (4.7) | 213.2 (22.7) | 0.105 | 226.7 (6.2) | 225.6 (4.2) | 0.647 | 224.4 (9.2) | 220.8 (4.7) | 0.277 |
| 4th Grade | 227.3 (10.4) | 228.2 (8.6) | 0.820 | 225.9 (7.9) | 232.6 (10.6) | 0.178 | 227.0 (11.5) | 226.3 (12.7) | 0.899 |
| 6th Grade | 251.6 (22.0) | 258.7 (21.5) | 0.315 | 246.0 (47.5) | 256.5 (44.1) | 0.508 | 241.3 (28.1) | 256.9 (28.9) | 0.108 |
| Sedentary behavior (min/day) | 122.7 (40.9) | 136.2 (36.7) | 0.113 | 132.8 (43.3) | 139.8 (38.7) | 0.464 | 151.8 (27.8) | 152.5 (36.1) | 0.930 |
| 3rd Grade | 78.5 (26.2) | 109.0 (14.9) | 0.005 | 92.7 (14.9) | 105.6 (22.3) | 0.154 | 138.1 (17.8) | 118.8 (13.8) | 0.017 |
| 4th Grade | 109.6 (19.2) | 134.7 (27.2) | 0.021 | 112.6 (26.0) | 125.0 (27.2) | 0.352 | 145.6 (26.2) | 141.3 (21.3) | 0.669 |
| 6th Grade | 157.7 (21.5) | 148.6 (43.2) | 0.382 | 165.4 (33.9) | 167.6 (33.4) | 0.847 | 162.6 (30.1) | 177.0 (35.6) | 0.203 |
| LPA (min/day) | 83.4 (14.1) | 85.4 (23.2) | 0.614 | 83.4 (26.0) | 84.8 (23.6) | 0.810 | 73.8 (18.8) | 78.0 (20.9) | 0.359 |
| 3rd Grade | 91.4 (10.8) | 88.5 (18.8) | 0.683 | 97.2 (7.2) | 92.7 (15.9) | 0.446 | 79.7 (23.4) | 92.1 (11.8) | 0.181 |
| 4th Grade | 91.5 (10.3) | 85.5 (22.0) | 0.340 | 90.8 (29.7) | 88.4 (17.9) | 0.822 | 73.6 (16.3) | 75.9 (14.3) | 0.729 |
| 6th Grade | 73.9 (11.9) | 84.1 (26.3) | 0.104 | 71.9 (28.0) | 78.1 (29.2) | 0.528 | 70.6 (17.4) | 72.9 (25.7) | 0.753 |
| MVPA (min/day) b | 26.9 [16.5–36.4] | 15.6 [6.1–22.6] | 0.001 | 16.1 [8.7–32.1] | 15.5 [6.6–24.0] | 0.529 | 6.8 [4.0–9.9] | 6.5 [8.7–11.1] | 0.683 |
| 3rd Grade | 60.3 [35.7–70.6] | 14.0 [6.7–19.8] | 0.003 | 35.6 [30.0–44.1] | 26.1 [19.9–31.9] | 0.071 | 5.3 [3.6–9.8] | 10.8 [5.1–12.8] | 0.222 |
| 4th Grade | 23.2 [16.5–31.5] | 5.1 [2.6–11.0] | 0.002 | 17.2 [16.8–27.0] | 18.1 [13.3–26.0] | 0.618 | 6.9 [4.8–8.6] | 5.8 [3.3–11.7] | 0.694 |
| 6th Grade | 20.6 [10.8–27.9] | 22.5 [15.6–30.5] | 0.452 | 8.7 [5.3–10.8] | 7.0 [5.3–14.7] | 1.000 | 6.8 [3.2–10.1] | 6.5 [3.8–10.1] | 0.843 |
Note. p-values obtained from independent samples t-test. a = Frequency and Percentages are presented instead of Mean (SD); p-value obtained from Fisher’s Exact Test. b = Median and Interquartile Range presented instead of Mean (SD); p-value obtained from Wilcoxon Rank Sum Test. P1 = comparing groups at Baseline. P2 = comparing groups at Post I. P3 = comparing groups at Post II. Sit-Stand group used a sitting desk from baseline (September) to Post 1 (December) and a stand-biased desk from January to April (Post II). Stand-Sit: used a sitting desk at baseline, standing desk from baseline (September) to Post I and a sitting desk from January to April (Post II). Baseline and Post I included five data collection days, Post II included four data collection days. Students attended school for 34.4 h/week.