Respiratory training as strategy to prevent cognitive decline in aging: a randomized controlled trial

Area of Science:

• Gerontology and Cognitive Neuroscience
• Exercise Physiology and Respiratory Medicine

Background:

• Aging is associated with reduced oxygenation, potentially leading to brain lesions and atrophy.
• Pulmonary function positively correlates with cognitive performance in middle-aged and older adults.

Purpose of the Study:

• To evaluate the impact of aerobic exercise and respiratory training on elderly individuals' blood oxygenation, pulmonary function, and cognitive abilities.
• To compare the effects of a 'walking' group, a 'breathing' group, and a social interaction control group.

Main Methods:

• A 6-month randomized controlled trial involving 68 community-dwelling elderly participants.
• Interventions included aerobic exercise (walking), respiratory training (breathing exercises), and a social interaction control.
• Cognitive function, pulmonary parameters, blood oxygen saturation (SpO2), and hemogram were assessed.

Main Results:

• Both aerobic exercise and respiratory training significantly improved pulmonary function parameters.
• The respiratory training group demonstrated enhanced cognitive performance in abstraction and mental flexibility.
• The aerobic exercise group maintained cognitive performance, with a slight decline in attention; the control group showed declines across multiple cognitive domains.

Conclusions:

• Both aerobic exercise and respiratory training effectively improve pulmonary function in the elderly.
• Respiratory training specifically enhances cognitive functions, including abstraction and mental flexibility.
• Observed cognitive improvements are not attributable to changes in blood oxygenation or hemogram parameters.