HIIT Versus MICT in COPD: Effects on Oxygenation, Pulmonary Function, and Strength

Comparison of the Effects of High-Intensity Interval Training and Moderate-Intensity Continuous Training on Peripheral and Respiratory Muscle Oxygenation, Pulmonary Function, Exercise Capacity, and Peripheral Muscle Strength in Individuals With Chronic Obstructive Pulmonary Disease

Chronic Obstructive Pulmonary Disease (COPD) is a progressive condition marked by airflow limitation and chronic inflammation, leading to reduced exercise capacity, peripheral muscle dysfunction, and dyspnea. High-Intensity Interval Training (HIIT) may offer a promising alternative for patients with low exercise tolerance; however, evidence on its effectiveness remains limited.

This study aims to compare the effects of HIIT and Moderate-Intensity Continuous Training (MICT) on muscle oxygenation, pulmonary function, exercise capacity, and peripheral muscle strength in individuals with COPD. Participants will undergo an 8-week exercise program, twice weekly. HIIT will consist of 1-minute intervals at 90% and 30-40% of peak workload, while MICT will involve continuous cycling at 65% of peak workload. Outcomes will be assessed at baseline, week 4, and week 8. Data will be analyzed using SPSS. This study seeks to determine the more effective training modality to optimize COPD rehabilitation.

Inclusion Criteria:

• Diagnosed with Chronic Obstructive Pulmonary Disease (COPD),
• GOLD stage 2, 3, or 4,
• Willing to participate in the study,
• Aged between 40 and 80 years,
• Clinically stable (no significant deterioration in the current medical condition, no recent initiation of a new treatment, and no complications requiring hospitalization).

Exclusion Criteria:

• Presence of visual, auditory, vestibular, cognitive, or neurological impairments that may affect balance,
• Any orthopedic, neurological, or cardiac conditions that may interfere with study participation or exercise,
• Presence of serious chronic diseases such as congestive heart failure, coronary artery disease, or chronic renal failure,
• Conditions that may cause physical limitations (e.g., limb amputation, significant musculoskeletal disorders, or postural abnormalities such as kyphosis or lordosis).