Aerobic capacity and cognitive performance in a cross-sectional aging study

Area of Science:

• Neuroscience
• Gerontology
• Exercise Physiology

Background:

• Cognitive function declines with age, influenced by various factors.
• Aerobic fitness (VO2max) is a modifiable factor potentially impacting cognitive aging.
• Understanding the interaction between aerobic capacity and cognitive performance across the lifespan is crucial.

Purpose of the Study:

• To investigate the predictive role of aerobic fitness (VO2max) on cognitive performance in a diverse age group.
• To examine the interaction between aerobic fitness and chronological age on cognitive measures.
• To determine if cognitively demanding tasks are particularly sensitive to aerobic capacity.

Main Methods:

• Recruited 132 healthy adults aged 24-76 years from the Maastricht Aging Study (MAAS).
• Assessed aerobic fitness using a submaximal bicycle ergometer protocol (VO2max).
• Conducted comprehensive neurocognitive testing, including intelligence, memory, and cognitive speed (e.g., Stroop, Concept Shifting Test).

Main Results:

• Aerobic capacity showed significant main and interaction effects with age on complex cognitive speed tasks (Stroop, Concept Shifting Test).
• Aerobic fitness accounted for up to 5% of the variance in cognitive scores, independent of age, sex, and intelligence.
• Participants with higher aerobic fitness engaged in more aerobic sports and reported better health.

Conclusions:

• Aerobic fitness acts as a moderator in cognitive aging, selectively impacting cognitive processes.
• Cognitive functions requiring substantial attentional resources appear most influenced by aerobic capacity in an age-dependent manner.
• Maintaining aerobic fitness may be a strategy to support cognitive health throughout aging.