Related Experiment Video
Updated: Mar 3, 2026
07:35
Aggravation of Myocardial Ischemia upon Particulate Matter Exposure in Atherosclerosis Animal Model
Published on: December 10, 2021
2.5K
Physical Activity, Obesity, and Subclinical Myocardial Damage.
Roberta Florido1, Chiadi E Ndumele2, Lucia Kwak3
1Johns Hopkins Ciccarone Center for the Prevention of Heart Disease, Johns Hopkins University School of Medicine, Baltimore, Maryland.
JACC. Heart Failure
|April 29, 2017
Summary
Regular physical activity is linked to less chronic myocardial damage, even in obese individuals. This may explain how exercise reduces heart failure risk.
Area of Science:
- Cardiology
- Preventive Medicine
- Exercise Physiology
Background:
- Physical activity reduces heart failure (HF) risk, especially in obese individuals.
- The role of chronic myocardial damage in this protective association remains unclear.
Purpose of the Study:
- To assess the link between physical activity levels and chronic myocardial damage, measured by high-sensitivity cardiac troponin T (hs-cTnT).
- To investigate this association in both obese and non-obese populations.
- To explore if physical activity modifies the relationship between obesity and myocardial damage.
Main Methods:
- 9,427 participants from the Atherosclerosis Risk in Communities Study without prior cardiovascular disease were analyzed.
- Physical activity was categorized as recommended, intermediate, or poor based on American Heart Association guidelines.
- Cross-sectional and prospective analyses examined associations between physical activity, obesity, elevated hs-cTnT, and incident HF.
Main Results:
- Poor physical activity was associated with higher odds of elevated hs-cTnT compared to recommended levels (OR: 1.39).
- Individuals with obesity and poor physical activity showed the highest odds of elevated hs-cTnT (OR: 2.46).
- Elevated hs-cTnT was a strong predictor of incident HF across all obesity and physical activity categories.
Conclusions:
- Physical activity demonstrates an inverse relationship with chronic subclinical myocardial damage.
- Exercise may mitigate the detrimental effects of obesity on myocardial health, potentially explaining its cardioprotective benefits.
- Physical activity's role in reducing myocardial damage could be a key mechanism for lowering heart failure risk.
Related Concept Videos
01:30Coronary Artery Disease I: Introduction
1.4K
Coronary Artery Disease (CAD): An Overview with Scientific InsightsCoronary Artery Disease (CAD), often referred to as C-A-D, is a prevalent blood vessel disorder classified under the broader category of atherosclerosis. Atherosclerosis is a pathological process characterized by the hardening and narrowing of arteries due to the accumulation of atherosclerotic plaques. These plaques are composed of cholesterol, fatty substances, inflammatory cells, calcium, and fibrin, reducing blood flow to...
1.4K
01:20Exercise and Cardiovascular Response
4.7K
Exercise significantly impacts cardiovascular response, which is crucial for understanding patient health and designing effective treatment plans.
Light to moderate physical activity initiates a series of interconnected responses in the body. The heart rate modestly increases in anticipation of the workout, followed by widespread vasodilation as oxygen consumption by skeletal muscles increases. This results in decreased peripheral resistance, increased capillary blood flow, and accelerated...
Light to moderate physical activity initiates a series of interconnected responses in the body. The heart rate modestly increases in anticipation of the workout, followed by widespread vasodilation as oxygen consumption by skeletal muscles increases. This results in decreased peripheral resistance, increased capillary blood flow, and accelerated...
4.7K
01:26Coronary Artery Disease II: Pathophysiology
821
Coronary Artery Disease (CAD) originates from a series of events that impair the function of coronary arteries, the blood vessels responsible for delivering oxygen-rich blood to the heart muscle. The pathophysiology of CAD is closely linked to atherosclerosis, a chronic inflammatory and lipid-driven condition affecting the vascular endothelium.1. Endothelial DamageThe process begins with damage to the vascular endothelium, which serves as a protective barrier between the blood and the vessel...
821
01:21Myocarditis I: Introduction
505
Myocarditis is inflammation of the myocardium, which is the muscular layer of the heart.EtiologyMyocarditis has a diverse etiology, including a wide range of infectious and non-infectious causes:Infectious CausesViral: Common viruses include Coxsackie A and B, adenovirus, parvovirus B19, enteroviruses, and influenza A.Bacterial: Examples include infections caused by Streptococcus, Staphylococcus, and Mycoplasma species.Rickettsial: Infections like Rocky Mountain spotted fever can result in...
505
01:30Coronary Artery Disease III: Clinical Manifestations
485
Coronary Artery Disease (CAD) is a primary health risk worldwide, leading to significant morbidity and mortality. The condition arises from the buildup of atherosclerotic plaques within the coronary arteries, resulting in diminished blood supply to the heart muscle.The clinical manifestations of CAD vary widely, from asymptomatic stages to severe, life-threatening conditions. Understanding these manifestations is crucial for early diagnosis and effective management.Angina Pectoris: The Warning...
485
01:19Acute Coronary Syndrome II: Pathophysiology and Clinical Manifestations
570
The pathophysiology of Acute Coronary Syndrome [ACD] involves several key processes:The main underlying cause of ACD is atherosclerosis, a chronic inflammatory disease characterized by the buildup of lipid-laden plaques within the coronary arteries.As the atherosclerotic plaque grows in the coronary artery, it may become unstable due to the formation of a lipid-rich core and a thin fibrous cap. Inflammatory cells within the plaque, such as macrophages, secrete enzymes that degrade the...
570