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Fig. 6. Inspired tidal volume, breathing frequency, minute ventilation, rate of
oxygen consumption (
O2) and
rate of carbon dioxide production
(CO2) increase in response
to treadmill exercise. White bars indicate rest, black bars indicate exercise
and grey bars indicate recovery period (first 2 min). Increases in both minute
ventilation and inspired tidal volume correlate with increases in treadmill
speed (r2=0.49, P=0.033;
r2=0.47, P=0.041, respectively); however,
increases in breathing frequency,
O2 and
CO2 did not correlate with
increases in treadmill speed (r2=0.012, P=0.78;
r2=0.011, P=0.78, r2=0.174,
P=0.26, respectively). Data presented are means ±
S.E.M. (N=5). * indicates a
significant difference relative to rest (paired Dunnett's test,
P<0.05).
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