TABLE 3.

Effect size and power test.

		MIP20% group		MIP40% group
		Comparison between steps
		Effect size Partial Eta ${\mathrm{\eta }}_{\mathrm{p}}^{\mathrm{2}}$	Power	Effect size Partial Eta ${\mathrm{\eta }}_{\mathrm{p}}^{\mathrm{2}}$	Power
VT	Oral interface	0.65	0.99	0.63	0.97
	Nasal interface	0.58	0.99	0.73	0.99
EIV	Oral interface	0.41	0.83	0.4	0.82
	Nasal interface	0.41	0.84	0.64	0.99
EEV	Oral interface	0.16	0.31	0.29	0.60
	Nasal interface	0.35	0.72	0.34	0.70
SCM	Oral interface	0.48	0.92	0.62	0.99
	Nasal interface	0.47	0.92	0.72	0.99
SCL	Oral interface	0.65	0.99	0.73	0.99
	Nasal interface	0.70	0.99	0.7	0.99
IC	Oral interface	0.44	0.89	0.56	0.98
	Nasal interface	0.59	0.99	0.43	0.86
		Comparison between oral interface vs. nasal interface during load
		Effect size Cohen’s d	Power	Effect size Cohen’s d	Power
VT		0.86	0.94	0.84	0.93
EIV		0.62	0.73	0.66	0.78
EEV		0.17	0.11	0.04	0.10
SCM		0.70	0.83	0.6	0.70
SCL		0.73	0.86	0.74	0.86
IC		0.29	0.25	0.4	0.35

Comparison of chest wall volumes and percentage of respiratory muscle activation intensity between quiet breathing, breathing against inspiratory load and recovery steps and between loading of nasal and oral interfaces. V_T, tidal volume; EIV, end inspiratory volume; EIV, end expiratory volume; SCM, sternocleidomastoid; SCL, scalene; IC, parasternal portion of the intercostal; OI, oral interface; NI, nasal interface.