Table 3.
Summary of main effects and interaction effects on primary outcome variables during exercise at absolute and relative work rates
| Absolute Work Rates |
Relative Work Rates |
|||||
|---|---|---|---|---|---|---|
| Age (P) | Sex (P) | Interaction (P) | Age (P) | Sex (P) | Interaction (P) | |
| Ventilatory response | ||||||
| V̇e, l/min | P < 0.05 | n.s. | — | n.s. | P < 0.05 | — |
| V̇e/V̇eCAP, % | P < 0.05 | n.s. | — | P < 0.05 | n.s. | — |
| Indexes of mechanical ventilatory constraint | ||||||
| EELV, % TLC | P < 0.05 | n.s. | — | P < 0.05 | n.s. | — |
| EILV, % TLC | P < 0.05 | n.s. | — | P < 0.05 | n.s. | — |
| Wb, J/min | P < 0.05 | P < 0.05 | n.s. | n.s. | n.s. | — |
| EFL | P < 0.05 | — | P < 0.05 | P < 0.05 | P < 0.05 | n.s. |
| Perceptual responses | ||||||
| Dyspnea, Borg scale | P < 0.05 | P < 0.05 | P < 0.05 | n.s. | n.s. | — |
VT, tidal volume; Fb, breathing frequency; V̇E, minute ventilation; V̇E/V̇CO2, ventilatory equivalent for carbon dioxide; V̇ECAP, ventilatory capacity; V̇E/V̇ECAP, fractional utilization of ventilatory capacity; EELV, end-expiratory lung volume; EILV, end-inspiratory lung volume; Wb, work of breathing; EFL, expiratory flow limitation.