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Supplemental oxygen and exercise ability in chronic obstructive airways disease
A C Davidson1, R Leach, R J George
1London Chest Hospital.
Thorax
|December 1, 1988
Summary
Supplemental oxygen significantly improves exercise capacity in patients with severe airflow obstruction. Portable oxygen therapy enhances walking endurance and cycling performance, even when carrying the oxygen supply.
Area of Science:
- Pulmonary Medicine
- Exercise Physiology
Background:
- Severe airflow obstruction significantly limits exercise capacity.
- Supplemental oxygen is often prescribed to alleviate hypoxemia during exertion.
Purpose of the Study:
- To evaluate the impact of supplemental oxygen on exercise performance in patients with severe airflow obstruction.
- To determine the relationship between oxygen flow rate and exercise endurance.
Main Methods:
- Seventeen patients with severe airflow obstruction underwent exercise testing (6-minute walk, endurance walk, endurance cycling) with and without supplemental oxygen.
- Different oxygen flow rates (2, 4, and 6 L/min) were tested during cycling.
Main Results:
- Supplemental oxygen (4 L/min) increased mean endurance walking time by 59% and 6-minute walking distance by 17%.
- Oxygen therapy at 2, 4, and 6 L/min increased cycling endurance time by 51%, 88%, and 80%, respectively.
- Patients could maintain a fixed walking speed for longer durations with supplemental oxygen.
Conclusions:
- Supplemental oxygen demonstrably enhances exercise performance in individuals with severe airflow obstruction.
- The benefits of supplemental oxygen on exercise capacity are significant and not negated by the effort of carrying portable equipment.
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