End of training
No improvement in acapella group.
In the intervention group, there was a 2.6 unit
improvement in the LCQ (the MCID for LCQ is 1.3 units) and
an 8 unit improvement in the SGRQ total score (the MCID for
SGRQ is 4 units).
At 20 weeks
No improvement in acapella group.
In the intervention group, there was a 4.4 unit
improvement in the LCQ (the MCID for LCQ is 1.3 units) and
a 4 unit improvement in the SGRQ total score