From: Is daily physical activity affected by dynamic hyperinflation in adults with cystic fibrosis?
CPET variables at peak exercise | All (n = 34) | Dynamic hyperinflation (n = 24) | Non-dynamic hyperinflation (n = 10) | p value |
---|---|---|---|---|
Work rate, % of predicted maximum | 87.5 ± 18.4 | 85.2 ± 14.7 | 93.2 ± 25.2 | 0.365 |
V’O2, ml∙min−1∙kg− 1 | 28.5 ± 4.8 | 28.7 ± 4.6 | 27.8 ± 5.6 | 0.639 |
V’O2, % of predicted maximum | 75.2 ± 13.3 | 75.2 ± 13.5 | 75.0 ± 13.4 | 0.960 |
HR, beats∙min− 1 | 155.4 ± 12.4 | 155.0 ± 12.5 | 156.3 ± 12.6 | 0.785 |
HR, % of predicted maximum | 83.3 ± 7.4 | 83.6 ± 7.9 | 82.5 ± 6.4 | 0.697 |
V’O2/HR, ml∙beat− 1 | 12.2 ± 3.1 | 12.9 ± 3.0 | 10.5 ± 2.5 | 0.037 |
SpO2, % | 93.6 ± 3.3 | 93.2 ± 3.4 | 94.7 ± 3.0 | 0.254 |
SpO2Δ, % | −3.2 ± 3.2 | −3.5 ± 3.3 | −2.5 ± 2.8 | 0.467 |
VT, l | 1.9 ± 0.6 | 2.0 ± 0.5 | 1.6 ± 0.6 | 0.040 |
Respiratory rate, breaths∙min− 1 | 37.8 ± 7.6 | 37.4 ± 6.7 | 38.8 ± 10.0 | 0.655 |
V’E, l∙min− 1 | 68.8 ± 19.9 | 73.2 ± 19.1 | 58.2 ± 18.7 | 0.042 |
BR, % | 31.2 ± 19.6 | 28.8 ± 18.7 | 36.7 ± 21.6 | 0.292 |
V’E/V’CO2 slope | 27.4 ± 5.3 | 28.2 ± 5.9 | 25.5 ± 2.8 | 0.181 |
PETCO2, mmHg | 40.1 ± 5.5 | 39.5 ± 5.8 | 41.3 ± 4.8 | 0.304 |
EELV, l | 3.8 ± 1.4 | 4.3 ± 1.2 | 2.7 ± 1.3 | 0.001 |
EELVΔ, l | 0.2 ± 0.6 | 0.5 ± 0.3 | − 0.5 ± 0.6 | < 0.001 |
EELVΔ, % of TLC | 2.6 ± 12.5 | 8.0 ± 5.4 | − 10.4 ± 15.3 | < 0.001 |
Dyspnea, modified Borg scale | 4.7 ± 2.5 | 5.1 ± 2.5 | 4.0 ± 2.4 | 0.183 |
Leg discomfort, modified Borg scale | 6.3 ± 2.1 | 6.6 ± 2.2 | 5.6 ± 1.8 | 0.223 |