Table 3.

Responses to final minute of constant-load exercise

	PL	VitC
Work rate, W	83 ± 10	83 ± 10
Work rate, % of peak	79 ± 3	79 ± 3
Exercise time, min	8.0 ± 1	8.0 ± 1
$\text{S}{\text{p}}_{{\text{O}}_2}$, %	92 ± 1	93 ± 1
HR, beats/min	126 ± 9	128 ± 10
Exertional dyspnea (0–10)	8.6 ± 0.8	8.4 ± 0.8
Ti, s	0.57 ± 0.06	0.57 ± 0.04
Te, s	1.07 ± 0.11	1.10 ± 0.06
Ti/Ttot	0.35 ± 0.01	0.34 ± 0.01
Vt, L	1.95 ± 0.2	1.97 ± 0.21
fR, breaths/min	39.4 ± 4.3	37.1 ± 2.1
$\dot{\text{V}}\text{E}$, L/min	74 ± 8	72 ± 8
$\dot{\text{V}}{\text{O}}_2$, L/min	1.59 ± 0.15	1.50 ± 0.18
$\dot{\text{V}}{\text{O}}_2$, %$\dot{\text{V}}{\text{O}}_{2\text{max}\hspace{0.17em}}$	99 ± 3	97 ± 4
$\dot{\text{V}}\text{C}{\text{O}}_2$, L/min	2.03 ± 0.2	1.97 ± 0.23
$\dot{\text{V}}\text{E}$/$\dot{\text{V}}{\text{O}}_2$	49 ± 4.8	52 ± 6.3
$\dot{\text{V}}\text{E}$/$\dot{\text{V}}\text{C}{\text{O}}_2$	37 ± 3	39 ± 4
ICdyn, L	2.7 ± 0.2	2.6 ± 0.2
EFL, %	72 ± 8	74 ± 9
MIP, cmH2O	−40 ± 4	−38 ± 4

Values are means ± SE. EFL, expiratory flow limitation; f_R, respiratory frequency; HR, heart rate; IC_dyn, dynamic inspiratory capacity; MIP, maximal inspiratory pressure; PL, placebo; $\text{S}{\text{p}}_{{\text{O}}_2}$, oxygen saturation; Te, expiratory time; Ti, inspiratory time; Ttot, respiratory cycle duration; $\dot{\text{V}}\text{C}{\text{O}}_2$, CO₂ production; $\dot{\text{V}}\text{E}$, minute ventilation; VitC, ascorbate; $\dot{\text{V}}{\text{O}}_2$, oxygen consumption; $\dot{\text{V}}{\text{O}}_{2\text{max}\hspace{0.17em}}$, maximal $\dot{\text{V}}{\text{O}}_2$; Vt, tidal volume. N = 8.