Suparoek Nawarat. Effect of inspiratory muscle training on pulmonary function and inspiratory muscle strength in individuals with parkinson's disease . Master's Degree(Physical Therapy). Mahidol University. : Mahidol University, 2006.
Effect of inspiratory muscle training on pulmonary function and inspiratory muscle strength in individuals with parkinson's disease
Abstract:
Pulmonary and respiratory muscle function impairment is common in patients with
Parkinson's disease (PD). Inspiratory muscle training may improve pulmonary function and
respiratory muscle strength. This study investigated the effect of inspiratory muscle training
(IMT) on pulmonary function and inspiratory muscle strength in patients with PD. Twentysix
patients with PD (stage II and III Hoehn and Yahr scale) were recruited for training and
control groups. Subjects in the training group were trained with pressure threshold IMT
device at 40% of their maximal inspiratory pressure (MIP) and changed from 40% of MIP
to 50% and 60% of MIP at the end of 2nd and 4th week respectively. They trained 30 breaths
each session and twice daily, for six weeks. The parameters in this study were pulmonary
function; vital capacity (VC), forced vital capacity (FVC), forced expiratory volume in one
second (FEV1), FEV1/FVC ratio, peak expiratory flow (PEF) and inspiratory muscle
strength; MIP. Pulmonary function and inspiratory muscle strength were measured on pretraining
and repeated every two weeks for both groups at 2nd, 4th and 6th week.
The results showed that FVC, FEV1, FEV1/FVC ratio were not statistically different
between both groups. During training period, training group progressively increased VC and
PEF. There was significantly different VC in training group at week 4 and week 6 when
compared to control group (p<0.05) and PEF showed a significant difference between two
groups only for week 6 (p<0.05). In addition, the result revealed significant progressive
increase in MIP in the training group throughout the entire 6 weeks period of IMT whereas
no change was demonstrated in the control group. The percent improvement in MIP was
20.45%, 41.17% and 56.10% at the end of 2, 4 and 6-week IMT respectively. MIP showed a
significant difference between two groups at week 2, 4 and 6 (p<0.05).
In conclusion, this study demonstrated that the inspiratory muscle training had a
positive effect on pulmonary function and inspiratory muscle strength in patients with PD.
The training protocol could be recommended as an adjunctive therapy to conventional
physical therapy in patients with Parkinson's disease.