Table 2. Pulmonary function variables in 18 patients with neuromuscular diseases, before and after the training (4-6 months of routine daily home air-stacking maneuvers), by diagnosis.

Variable	Pre-training		Post-training
	SMA	CMD	SMA	CMD
	(n = 8)	(n = 10)	(n = 8)	(n = 10)
FVC (L)	1.818 ± 0.652	1.758 ± 0.580*	1.835 ± 0.625	1.824 ± 0.668*
MIC (L)	2.044 ± 0.732	2.047 ± 0.585*	2.084 ± 0.676	2.036 ± 0.706*
UPCF (L/min)	237.30 ± 85.48	274.10 ± 84.10*	261.90 ± 75.19	290.80 ± 102.80*
APCF (L/min)	248.40 ± 73.86	292.20 ± 313.3*	283.10 ± 85.16	313.30 ± 110.10*

SMA: spinal muscular atrophy; CMD: congenital muscular dystrophy; MIC: maximum insufflation capacity; UPCF: unassisted peak cough flow; and APCF: assisted peak cough flow

^aData are presented as mean ± SD

^*p > 0.05 vs. SMA (unpaired Student's t-test).