Table 2.

Calibration (pre-test) and verification (post-test) readings of the exercise and non-exercise trials.

	Fractional oxygen concentration (%)				Fractional carbon dioxide concentration (%)
	Room air		Tank gas		Room air		Tank gas
	Pre	Post	Pre	Post	Pre	Post	Pre	Post
EXERCISE TRIALS, N = 30
Mean	20.93	20.75**	15.05	14.91**	0.00	0.00**	5.99	5.94**
SD	N/A	0.06	N/A	0.07	N/A	0.01	N/A	0.02
RANGE
Min	N/A	20.61	N/A	14.82	N/A	0.00	N/A	5.89
Max	N/A	20.91	N/A	15.05	N/A	0.02	N/A	5.97
NON-EXERCISE TRIALS, N = 30
Mean	20.93	20.93††	15.05	15.05††	0.00	0.01*†	5.99	6.00*††
SD	N/A	0.01	N/A	0.01	N/A	0.01	N/A	0.01
RANGE
Min	N/A	20.90	N/A	15.03	N/A	0.00	N/A	5.99
Max	N/A	20.95	N/A	15.07	N/A	0.02	N/A	6.02

Pre, pre-test calibration readings; Post, post-test verification readings.

Significantly different from Pre:

^*P < 0.01,

^**P < 0.001.

Significantly different from the exercise trials:

^†P < 0.01,

^††P < 0.001.