TABLE 3

Univariate correlation matrix of maximal power output (MPO), muscle strength and lung diffusion and maximal breathing capacity (MBC)

Variable	MPO	Row	Bench	Quads	MIP	MEP	K_CO	V_A	MBC
MPO	1.00	0.66	0.74	0.74	0.58	0.53	0.22	0.60	0.67
Row	0.66	1.00	0.86	0.80	0.59	0.63	0.05	0.63	0.63
Bench	0.74	0.86	1.00	0.84	0.63	0.64	0.10	0.64	0.67
Quads	0.74	0.80	0.84	1.00	0.61	0.61	0.11	0.60	0.65
MIP	0.58	0.59	0.63	0.61	1.00	0.69	0.11	0.45	0.60
MEP	0.53	0.63	0.64	0.61	0.69	1.00	0.01	0.46	0.53
K_CO	0.22	0.05	0.10	0.11	0.11	0.01	1.00	−0.24	0.03
V_A	0.60	0.63	0.64	0.60	0.45	0.46	−0.24	1.00	0.70
MBC	0.67	0.63	0.67	0.65	0.60	0.53	0.03	0.70	1.00

Data shown as Pearson r correlations. Quads: quadriceps strength; MIP: maximal inspiratory pressure; MEP: maximal expiratory pressure; K_CO: carbon monoxide transfer coefficient; V_A: alveolar volume.