Static balance is affected following an exercise task in chronic obstructive pulmonary disease

Area of Science:

• Pulmonary Rehabilitation
• Neuromuscular Function
• Exercise Physiology

Background:

• Chronic obstructive pulmonary disease (COPD) significantly impacts patients' functional capacity and quality of life.
• Balance impairments are common in individuals with COPD, increasing fall risk.
• The effects of submaximal exercise on balance in COPD patients require further investigation.

Purpose of the Study:

• To evaluate the impact of a submaximal exercise task, the 6-minute walk test (6MWT), on balance in patients diagnosed with COPD.
• To identify specific balance parameters affected by the 6MWT in this patient population.

Main Methods:

• Nineteen patients with COPD underwent a 6-minute walk test (6MWT).
• Balance was assessed before and after the 6MWT using the timed-up and go (TUG) test, step-up test, and static posturography (quiet standing) in various stances and visual conditions.
• Body sway was measured using a swaymeter, and data were analyzed with linear mixed models.

Main Results:

• Following the 6MWT, patients exhibited significantly increased postural sway in a semi-tandem stance with eyes closed (P=.043).
• Mediolateral sway also significantly increased in this condition (P=.011).
• The 6MWT did not significantly affect TUG test performance, step-up test results, or balance in other tested conditions (P > .05).

Conclusions:

• Submaximal exercise, specifically the 6MWT, can acutely impair balance in patients with COPD, particularly during static standing without visual input.
• These findings suggest that exercise-induced balance deficits may have implications for functional performance and fall risk in individuals with chronic respiratory diseases.
• Further research should explore strategies to mitigate post-exercise balance impairments in COPD management.