Table 3.
Comparison of mean changes of the NIRS variables between groups regarding the treadmill test, before and after the intervention.
| Variables | Conventional Group | Modified Group | Effect group (p-value) |
Effect situation (p-value) |
Effect Interaction (p-value) |
||
|---|---|---|---|---|---|---|---|
| Pre (n = 20) | Post (n = 16) | Pre (n = 20) | Post (n = 16) | ||||
| Delta HHb on treadmill (a.u.) |
11.87 (7.96 to 15.78) |
12.04 (6.75 to 17.34) |
12.49 (8.67 to 16.31) |
12.34 (7.18 to 17.5) |
0.870 | 0.995 | 0.932 |
| Delta StO2 on treadmill (%) |
−19.09 (−22.77 to −15.41) |
−18.00 (−22.30 to −13.69) |
−21.07 (−24.65 to −17.49) |
−21.29 (−25.47 to −17.11) |
0.288 | 0.709 | 0.575 |
| Time to reach lower StO2 on treadmill (s) |
150.00 (109.72 to 190.28) |
772.00*,† (423.11 to 1120.89) |
104.00 (64.74 to 143.26) |
140.63 (−197.19 to 478.44) |
0.008 | 0.010 | 0.020 |
| Time of resistance after reaching lower StO2 (s) |
133.16 (41.31 to 225.01) |
1236.00* (487.78 to 1984.22) |
147.50 (57.98 to 237.02) |
1250.00* (525.54 to 1974.46) |
0.956 | <0.001 | 0.999 |
| Recovery time on the treadmill (s) |
720.68 (316.68 to 1124.68) |
155.08* (72.54 to 237.62) |
637.76 (210.66 to 1064.86) |
223.77* (146.56 to 300.98) |
0.962 | 0.002 | 0.610 |
| Deoxygenation Rate (∆StO2/s) |
0.19 (−2.60 to 2.99) |
0.09*,† (−1.73 to 1.91) |
0.25 (−3.73 to 4.22) |
0.20* (−1.29 to 1.7) |
0.017 | 0.002 | 0.185 |
| Re-oxygenation Rate (∆StO2/min) |
−3.75 (−5.1 to −2.40) |
−3.26 (−7.19 to 0.67) |
−4.32 (−5.69 to −2.95) |
−5.26 (−9.33 to −1.19) |
0.375 | 0.870 | 0.601 |
| Relative re-oxygenation rate (∆StO2/min) |
−11.90 (−21.82 to −1.98) |
−114.17* (−204.4 to −23.93) |
−17.69 (−28.63 to −6.76) |
−78.24* (−171.88 to − 5.4) |
0.639 | 0.017 | 0.517 |
| Walking economy meters/delta HHb (m/∆HHb) |
16.61 (−35.35 to 68.56) |
3.29 (−511.54 to 518.11) |
−11.24 (−61.89 to 39.4) |
−37.25 (−535.72 to 461.23) |
0.847 | 0.912 | 0.972 |
| Walking economy meters/delta StO2 (m/∆StO2) |
−11.52 (−17.84 to −5.20) |
−127.82* (−185.90 to −69.75) |
−10.06 (−16.22 to −3.90) |
−57.80* (−112.12 to −3.47) |
0.078 | <0.001 | 0.090 |
Data are presented as mean (95% CI). HHb: deoxyhemoglobin; a.u.: arbitrary unit; StO2: tissue saturation; s: seconds, ∆: delta/variation; *p < 0.05 for comparison between pre and post treatment, via Bonferroni test; †p < 0.05 for comparison between groups, via Bonferroni test.