Table 2.
Tidal volume, respiratory rate and muscle activity for each respiratory maneuver and sitting posture (mean ± SD)
| Parameters | QB |
PLB |
||||
|---|---|---|---|---|---|---|
| NP | WAS | WAHS | NP | WAS | WAHS | |
| TV (ℓ) |
0.7 ± 0.2 |
0.8 ± 0.2 |
0.8 ± 0.3 |
1.3 ± 0.1 |
1.3 ± 0.2 |
1.3 ± 0.2 |
| RR (f/min) |
18.1 ± 3.0 |
16.7 ± 3.4 |
16.5 ± 2.1 |
12.0 ± 0.6 |
12.0 ± 1.1 |
12.0 ± 0.9 |
| SM (%RVC) |
100.0 ± .0 |
104.4 ± 35.1 |
123.4 ± 25.2 |
118.4 ± 17.7 |
134.6 ± 31.2 |
150.1 ± 45.3 |
| SCM (%RVC) |
100.0 ± .0 |
113.1 ± 12.4 |
115.6 ± 13.7 |
115.8 ± 17.0 |
122.9 ± 24.0 |
131.0 ± 24.0 |
| PM (%RVC) | 100.0 ± .0 | 204.0 ± 89.0 | 161.2 ± 78.1 | 113.6 ± 20.5 | 271.1 ± 214.6 | 167.0 ± 69.2 |
NP, neutral position; PLB, pulsed lips breathing; PM, pectoralis major; %RVC, percentage of reference voluntary contraction; QB, quiet breathing; RR, respiratory rate; SCM, sternocleidomastoid muscle; SM, scalene muscle; TV, tidal volume; WAHS, breathing training with arm and head support; WAS, breathing training with arm support.