Effect of Treadmill Exercise Using 80% Intensity of Six Minute Walk Test on Walking Distance and Quality of Life in Moderate Stage Chronic Obstructive Pulmonary Disease Patients
Abstract: Skeletal muscle
dysfunction poses as one of the systemic manifestation of chronic obstructive
pulmonary disease (COPD) in the impact of inactivity and deconditioning from
early fatigue to the end of declining quality of life (QoL). Giving pulmonary
rehabilitation program of treadmill exercise will overcome the problem, but
standard method for moderate stage of COPD is not yet available. This study
aimed to evaluate the effect of treadmill exercise using 80% intensity of six
minute walk test on walking distance and QoL in moderate stage COPD in order to
overcome muscle dysfunction. Samples were taken from Physical Medicine and
Rehabilitation and Respirology subdivision of Internal Medicine outpatient
clinic of Dr. Hasan Sadikin General Hospital Bandung, from March 2012–April
2013. Data analysis was tested using t-test for comparison of two independent
mean data. Otherwise, non parametric test of Mann Whitney and Wilcoxon Match
Pair test. Thirty three subjects of moderate stage COPD were divided into 2
groups (intervention and control). Intervention group received treadmill
exercise with 80% intensity from preliminary 6MWT for 30–60 minutes/session, 3
session/week for 6 weeks. Significant increase on walking distance was found in
intervention group (70.66 m) compared to control group (7.43 m) after 6 weeks
(p≤0.05). QoL using St. George Respiratory Questionnaire (SGRQ) showed
significant decrease in intervention group for all components in the end of 6
weeks (total p=0.0038, symptoms p=0.0162, activities p=0.0043 and impact
p=0.0057, p≤0.05). Eighty percent intensity of 6MWT in treadmill exercise for 6
weeks was well tolerated and could overcome skeletal muscle dysfunction in
moderate stage COPD. It also revealed higher values in aerobic capacity and QoL
compared to previous studies. In conclusion, treadmill exercise using 80%
intensity of 6MWT provides further walking distance and higher QoL compared to
control in moderate stage COPD.
Author: Farida Arisanti, Vitriana,
Prayudi Santoso
Journal Code: jpkedokterangg160110
