Table 2.

Means, standard deviations, and significance of linear trends for PCO2 and RR data across treatment weeks

Measures	Week 1	Week 2	Week 3	Week 4	df	F ratio for linear trend	η²
End-tidal pCO2
Baseline	36.67 (3.04)	36.76 (2.53)	37.23 (2.64)	37.88 (2.82)	1,34	7,99^*^a	.19
Pacing tones plus feedback	34.69 (5.14)	36.70 (2.69)	37.56 (3.07)	38.75 (3.44)	1,34	35,95^**^a	.51
Feedback only	34.53 (5.03)	35.98 (2.71)	36.72 (3.07)	37.67 (3.66)	1,34	19,63^**^a	.37
Respiration Rate
Baseline	14.75 (3.55)	14.08 (2.63)	12.74 (3.10)	12.23 (3.76)	1,34	12,95^**^b	.28
Pacing tones plus feedback	12.95(0.93)	11.31 (1.57)	9.05 (1.50)	7.76 (2.61)	1,34	272,47^**^b	.89
Feedback only	13.30 (1.94)	11.77 (1.94)	9.85 (2.22)	8.52 (2.95)	1,34	105,77^**^b	.76

^***

p<.001;

^**

p<.01,

p<.05,

⁺

p<.10 (Greenhouse-Geisser εcorrected)

^{a, b}

Bonferroni-corrected (overall p<.05 or .01/3) significance levels

^**

p<.01,

p<.05