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.
Key words: Moderate stage COPD, quality of life, treadmill exercise, 6MWD
Author: Farida Arisanti, Vitriana, Prayudi Santoso
Journal Code: jpkedokterangg160110