Why the study?
How do age, posture, and exercise affect the duration of mechanical systole in healthy men?
Population
32 healthy men, comprising 12 aged 20-25 years and 20 aged 61-83 years
Comparison
Exercise with stepwise increased work loads in… vs Rest, comparison between supine and sitting…
Design
Cross-sectional
Authors
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May inform ECG interpretation of systolic intervals in older men; leaves open need for age-adjusted norms in risk assessment.
How do age, posture, and exercise affect the duration of mechanical systole in healthy men?
Mechanical systole duration decreases with increasing heart rate during exercise, with older men exhibiting a slightly longer mechanical systole at a given heart rate compared to younger men.
T. Strandell (1964) studied this question.
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