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Peripheral Artery Disease I: Introduction01:30

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Peripheral artery disease (PAD) predominantly results from atherosclerosis, which involves the accumulation of fatty deposits, or plaques, within the walls of arteries. This causes them to narrow and harden, significantly reducing blood flow. PAD predominantly affects the legs, particularly the arteries supplying the thighs and calves. In rare cases, it may involve other arteries, including those in the arms.Etiology of PAD:The principal cause of PAD is atherosclerosis, which results from fatty...
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Clinical manifestationsPeripheral Arterial Disease (PAD) manifests through a range of symptoms, from the characteristic intermittent claudication to atypical presentations and severe complications in advanced stages. Intermittent claudication, a hallmark symptom of PAD, presents as exercise-induced muscle pain that typically resolves within minutes of rest. This pain is reproducible and stems from inadequate blood flow, leading to the accumulation of lactic acid produced during anaerobic...
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The external iliac artery transitions out of the body cavity, entering the femoral region of the lower leg, and is renamed the femoral artery at the point where it traverses the body wall. This artery is responsible for the distribution of blood to the thigh's deep muscles and the skin's ventral and lateral regions, achieved through several minor branches and the lateral deep femoral artery, which also spawns a lateral circumflex artery. The knee area receives blood from the genicular...
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Atherosclerosis is a progressive disorder that leads to the thickening and narrowing of arterial walls due to plaque buildup. This condition can cause various symptoms depending on the arteries affected:Coronary Artery Disease (CAD): This condition affects the coronary arteries and may lead to chest pain (angina), shortness of breath (dyspnea), heart attacks, and other heart disease symptoms.Cerebrovascular Disease: This affects blood flow to the brain, causing transient ischemic attacks (TIAs)...
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Eccentric loading is a crucial concept in the study of structural engineering and mechanics, particularly when analyzing the stability and stress distribution in columns. Unlike centric loading, where the force is applied along the centroidal axis, causing uniform compression, eccentric loading occurs when a force is applied off-center. This off-center application introduces not only direct compressive stress but also bending stress, significantly influencing the column's behavior under...
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Measuring Ascending Aortic Stiffness In Vivo in Mice Using Ultrasound
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Arterial stiffness results from eccentrically biased downhill running exercise.

J F Burr1, M Boulter1, K Beck1

  • 1Applied Human Science, Human Performance and Health Research Laboratory, University of PEI, Canada.

Journal of Science and Medicine in Sport
|April 9, 2014
PubMed
Summary

Eccentrically accentuated downhill running increases arterial stiffness and muscle soreness, with changes peaking around 48 hours post-exercise. This finding may explain arterial stiffening observed in long-term runners.

Keywords:
Arterial complianceDOMSEnduranceInflammationMarathonPulse wave velocity

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Area of Science:

  • Exercise Physiology
  • Cardiovascular Physiology
  • Sports Medicine

Background:

  • Moderate-intensity aerobic exercise typically benefits vascular health.
  • Some exercise forms may negatively impact vascular function.
  • Eccentrically accentuated exercise requires further investigation regarding vascular effects.

Purpose of the Study:

  • To investigate arterial stiffness changes after eccentrically accentuated aerobic exercise.
  • To determine if arterial stiffness alterations correlate with muscle soreness.

Main Methods:

  • A repeated measures experimental cohort design was employed.
  • Twelve moderately trained participants completed a 40-minute downhill run at -12° grade (60% VO₂max).
  • Cardiovascular measures and muscle soreness were assessed up to 72 hours post-exercise.

Main Results:

  • Muscle soreness peaked at 48 hours post-exercise (p<0.001).
  • Arterial stiffness also peaked at 48 hours (p=0.04) and remained elevated through 72 hours.
  • These changes occurred without extreme duration or high pace.

Conclusions:

  • Eccentrically accentuated downhill running leads to arterial stiffening.
  • The timing of arterial stiffening aligns with the inflammatory response to muscle damage.
  • Findings may elucidate arterial stiffening in endurance athletes and after prolonged races.