Table 4.
Changes in ground forces during gait after metabolic surgery-induced weight loss
| Self-Selected Speed |
Standard Speed |
|||||||
|---|---|---|---|---|---|---|---|---|
| Variable | T0 | T1 | T2 | F, P | T0 | T1 | T2 | F, P |
| VGRF, N | 1,320 ± 309 | 964 ± 250* | 924 ± 264* | 52.4, 0.001 | 1,398 ± 309 | 1,012 ± 221* | 926 ± 223† | 68.7, 0.001 |
| VGRF, N/kg | 10.5 ± 0.8 | 10.5 ± 0.8 | 11.0 ± 0.7* | 6.2, 0.009 | 11.1 ± 0.6 | 11.1 ± 0.5 | 11.1 ± 0.4 | 0.9, 0.907 |
| Slope, N/s | 7,660 ± 3,044 | 5,693 ± 2,143* | 6,090 ± 2,031* | 4.0, 0.037 | 9,021 ± 2,391 | 6,655 ± 1,170* | 6,250 ± 1,094* | 19.7, 0.001 |
| Slope, N·s−1·kg−1 | 61.5 ± 23.1 | 62.0 ± 15.1 | 72.9 ± 12.3 | 2.4, 0.117 | 72.1 ± 13.1 | 73.5 ± 6.3 | 76.2 ± 7.0 | 0.8, 0.447 |
| Braking force, N | −239 ± 56 | −190 ± 59* | −188 ± 67* | 9.2, 0.002 | −277 ± 80 | −211 ± 60* | −192 ± 51† | 21.9, 0.001 |
| Braking force, N/kg | −1.90 ± 0.26 | −2.0 ± 0.25 | −2.2 ± 0.33† | 5.2, 0.016 | −2.2 ± 0.35 | −2.3 ± 0.28 | −2.3 ± 0.23 | 0.7, 0.500 |
Values are means ± SD. VGRF, first peak of the vertical ground reaction force; slope, rate of rise of first peak of the vertical ground reaction force; braking force, maximum posterior ground reaction force. Italics denote P < 0.05.
*
P < 0.05, different relative to baseline.
†
P < 0.05, different relative to baseline and follow-up 1.