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Related Experiment Videos

Training and electrocardiographic abnormalities in the elderly

K H Sidney, R J Shephard

    British Heart Journal
    |October 1, 1977
    PubMed
    Summary
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    This study on older adults found that regular exercise training improves electrocardiogram (ECG) readings during rest and recovery. Exercise training also reduces exercise-induced ECG changes, suggesting cardiovascular benefits.

    Area of Science:

    • Cardiology
    • Exercise Physiology

    Background:

    • Electrocardiographic abnormalities during exercise are common, particularly in women.
    • The impact of regular training on cardiac responses in older adults requires further investigation.

    Purpose of the Study:

    • To investigate the effects of exercise training on electrocardiogram (ECG) parameters in older adults.
    • To compare ECG responses between men and women during exercise and recovery.

    Main Methods:

    • Recorded CM5 lead electrocardiograms (ECGs) from 39 adults (14 men, 25 women) aged 60-75 years.
    • Monitored ECGs at rest, during graded bicycle ergometer exercise (75-85% max oxygen intake), and during recovery.
    • Assessed the influence of training intensity and frequency on exercise-induced ECG changes.

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    Main Results:

    • Confirmed higher frequency of ischemic ECG abnormalities in women, potentially due to higher myocardial workload.
    • Observed training-induced ST segment elevation at rest and recovery, and reduced ST depression during exercise at a given heart rate.
    • Exercise-induced ECG changes correlated with training intensity and frequency.

    Conclusions:

    • Regular exercise training positively impacts ECG parameters in older adults, enhancing rest and recovery readings.
    • Training may mitigate exercise-induced myocardial ischemia through improved collateral circulation, reduced hyperkalemia, or altered myocardial workload.
    • Findings suggest exercise training is beneficial for cardiovascular health in the aging population.