The QoL factors under the physical activity category were ‘breathe easily’ (Q14), ‘walk, climb stairs exercise’ (Q15), and ‘accomplish daily activities’ (Q16) from the WURSS-21 questionnaire. The score range for the physical activity category was calculated by adding the maximum score of each factor, resulting in a range of 0–21. At baseline, the physical activity mean (±SE) score was 13.1 (±0.36), which was considered mild (score = 9) to moderate (score = 15) in severity level.