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Related Concept Videos

Hypertension and Regulation of Blood Pressure01:18

Hypertension and Regulation of Blood Pressure

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Hypertension, the most common cardiovascular disease, is diagnosed through repeated measurements of elevated blood pressure. Its risks, including damage to the kidney, heart, and brain, are directly proportional to blood pressure levels. Starting from 115/75 mm Hg, the risk of cardiovascular disease doubles with each increment of 20/10 mm Hg. The diagnosis relies on blood pressure measurements, not on patient symptoms, as hypertension is often asymptomatic until end-organ damage is imminent or...
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Regular physical activity is essential for maintaining cardiovascular health, with aerobic exercises being particularly effective. According to the American Heart Association, 150 minutes of moderate to intense aerobic exercise per week is recommended for a healthy heart. Aerobic activities may include brisk walking, running, bicycling, cross-country skiing, and swimming, ideally performed three to five times per week.
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Updated: Apr 29, 2026

Assessment of Vascular Tone Responsiveness using Isolated Mesenteric Arteries with a Focus on Modulation by Perivascular Adipose Tissues
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Aging and the exercise pressor reflex in humans.

Troy A Markel1, Joseph C Daley, Cynthia S Hogeman

  • 1Cardiology Division, Penn State College of Medicine, Hershey, PA, USA.

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Summary

Aging reduces the body's muscle reflex response during exercise. Older adults showed weaker blood pressure and nerve activity increases compared to younger individuals during forearm ischemia.

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Area of Science:

  • Exercise Physiology
  • Autonomic Nervous System Function
  • Aging Research

Background:

  • Blood flow limitation during exercise activates the muscle reflex.
  • This reflex increases heart rate, blood pressure, and muscle sympathetic nerve activity.

Purpose of the Study:

  • To investigate forearm blood flow and autonomic responses to ischemic handgrip exercise.
  • To compare these responses between young and older adults.

Main Methods:

  • Young and older adults performed rhythmic handgrip exercise with increasing forearm pressure (ischemia).
  • Measurements included heart rate, blood pressure, muscle sympathetic nerve activity, forearm flow, venous oxygen saturation, H+, and lactate.

Main Results:

  • Ischemic handgrip increased heart rate, blood pressure, muscle sympathetic nerve activity, and lactate, while decreasing forearm flow and oxygen saturation.
  • Older adults exhibited attenuated blood pressure and muscle sympathetic nerve activity responses, along with higher oxygen saturation, compared to younger adults.

Conclusions:

  • Aging significantly attenuates the muscle reflex response to exercise-induced blood flow limitation.
  • These findings highlight age-related differences in autonomic cardiovascular regulation during stress.