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Measuring cardiopulmonary parameters during dual-task while walking.

Einat Kodesh, Rachel Kizony

    Journal of Basic and Clinical Physiology and Pharmacology
    |October 12, 2013
    PubMed
    Summary
    This summary is machine-generated.

    Performing cognitive tasks while walking increases energy demands and breathing rate, even in young adults. Participants adjusted their walking strategies to maintain cognitive performance during dual-tasking.

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    Area of Science:

    • Human physiology
    • Neuroscience
    • Biomechanics

    Background:

    • Dual-tasking, performing cognitive and motor tasks simultaneously, is common in daily life.
    • Understanding the metabolic cost and physiological responses during dual-task walking is crucial for assessing functional capacity.

    Purpose of the Study:

    • To investigate the metabolic cost and physiological adjustments during dual-task walking at comfortable and fast gait speeds.
    • To examine the impact of cognitive load on cardiorespiratory and gait parameters.

    Main Methods:

    • Twenty-five healthy young adults performed cognitive tasks while walking over-ground and on a treadmill at different speeds.
    • Cardiopulmonary parameters (VO2, breathing rate) and gait parameters were measured.
    • Cognitive performance was assessed via riddle completion accuracy.

    Main Results:

    • Cognitive load increased metabolic cost (VO2) at rest and breathing rate during dual-task walking.
    • Gait speed decreased in 52% of participants during over-ground dual-tasking, with reduced tidal volume.
    • Cognitive performance was maintained or improved in over 70% of participants during walking.

    Conclusions:

    • Mental processing during walking incurs significant energy demands and alters cardiorespiratory responses.
    • Breathing rate is a sensitive indicator of cognitive load during walking in healthy young adults.
    • Individuals can adapt their gait strategies to maintain cognitive function during dual-task walking, especially when gait speed is controlled.