Table 2.
Quiet and Dual-task Postural Control Parameters in TC Expert and TC Naïve.
| TC Expert | TC Naïve | P Value | |
|---|---|---|---|
| Quiet Standing | |||
| COP Sway Speed (mm/s) | 8.9 (3.3) | 8.3 (2.4) | .41 |
| ML | 3.9 (2.2) | 3.7 (1.7) | .69 |
| AP | 7.1 (2.3) | 6.6 (1.9) | .33 |
| Elliptical Area (mm2)a | 109.7 (56.8) | 131.0 (73.2) | .16 |
| ML Range (mm) | 14.3 (12.7) | 15.5 (9.8) | .65 |
| AP Range (mm) | 24.6 (9.4) | 24.5 (7.7) | .98 |
| Dual-task Standing | |||
| COP Sway Speed (mm/s) | 11.0 (4.6) | 12.5 (7.1) | .27 |
| ML | 4.8 (2.3) | 5.8 (4.2) | .15 |
| AP | 8.8 (3.7) | 9.7 (5.1) | .40 |
| Elliptical Area (mm2)a | 127.9 (106.3) | 225.4 (231.1) | .01b |
| ML Range (mm) | 15.5 (12.0) | 22.9 (21.6) | .05b |
| AP Range (mm) | 28.1 (16.6) | 31.5 (15.7) | .38 |
Note: Data = means (SD).
a
High variability for this sway parameter resulted in the removal of outliers 2SD +/− the mean for this analysis only: Quiet - (1) TC expert, (4) TC naïve; Dual task – (1) TC expert, (2) TC-naïve.
b
P value < .05 as determine by Student’s t test.
Abbreviations: TC, tai chi; COP, center of pressure; ML, medial-lateral; AP, anterior-posterior.