Why the study?
Does age affect the hemodynamic response to graded postural stress in healthy men?
Population
Healthy men in three age groups: young, middle-aged, and older.
Comparison
Graded gravity increments from 10 degrees… vs Comparison across the three age groups
Design
Cross-sectional
Key result
Older men (60-69 years) exhibited significantly lesser increases in heart rate and diastolic pressure in response to graded postural stress compared to younger men.
Authors
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Attenuated HR and diastolic pressure responses to head-up tilt in older men suggest reduced orthostatic compensation; leaves open relevance to syncope risk in aging.
Observational
Does age affect the hemodynamic response to graded postural stress in healthy men?
Older men exhibit blunted heart rate and diastolic pressure responses to postural stress, providing a physiological mechanism for the increased incidence of postural hypotension in the elderly.
Smith et al. (1987) conducted an observational in Healthy. Older age (60-69 years) vs. Younger age (20-29 and 40-49 years) was evaluated on Hemodynamic response (heart rate and diastolic pressure). Older men (60-69 years) exhibited significantly lesser increases in heart rate and diastolic pressure in response to graded postural stress compared to younger men.