Evaluation of inspiratory muscle training using target resistors in chronic obstructive pulmonary disease patients

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Evaluation of inspiratory muscle training using target resistors in chronic obstructive pulmonary disease patients

 

Author: Leung, Tak-yin Esther
Title: Evaluation of inspiratory muscle training using target resistors in chronic obstructive pulmonary disease patients
Degree: M.Sc.
Year: 1998
Subject: Lungs -- Diseases, Obstructive -- Patients -- Rehabilitation
Respiratory therapy
Hong Kong Polytechnic University -- Dissertations
Department: Multi-disciplinary Studies
Dept. of Rehabilitation Sciences
Pages: ix, 117 leaves : ill. (some col.) ; 30 cm
Language: English
InnoPac Record: http://library.polyu.edu.hk/record=b1446577
URI: http://theses.lib.polyu.edu.hk/handle/200/297
Abstract: The purpose of the present study was to determine the effects of resistive inspiratory muscle training on inspiratory muscle strength, endurance and exercise capacity in patients with chronic obstructive pulmonary disease (COPD). Fifteen COPD patients suffering from COPD with forced expiratory volume in the first second (FEV1)<=70% predicted were randomly assigned into 2 groups in the study. Group 1 (n=6) acted as a control group and did not undergo any training. Group 2 (n=9) received resistive inspiratory muscle training for a six week period. The apparatus used was a Diemolding Health Care Division (DHD) resistive trainer with adjustable disks connected to a Hudson spirometer, which acted as a target during training. Outcome measures included parameters obtained in the pulmonary function test - forced expiratory volume in the first second (FEV1), forced vital capacity (FVC), vital capacity (VC); maximum inspiratory muscle force (Pimax), muscle endurance denoted by the breathing frequency at 80% Pimax, and exercise capacity denoted by the distance covered in the 12 minute walk test. The training regime involved 100 breaths of training twice per day, on a daily basis, for a total of six weeks. Each patient was reassessed every fortnight. The results showed that there was significant improvement in Pimax and the endurance test in the training group (p=0.032 and p=0.002) compared to the control group. However, the pulmonary function parameters and exercise capacity showed no significant changes. These results suggested that six weeks' resistive inspiratory muscle training can improve the inspiratory muscle strength and endurance in COPD patients, but not in their pulmonary function and exercise capacity.

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