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Exercise and Cardiovascular Response01:20

Exercise and Cardiovascular Response

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...

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Related Experiment Video

Updated: Jun 16, 2026

Author Spotlight: Decellularization-Based Quantification of Skeletal Muscle Fatty Infiltration
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Exercise Training to Decrease Ectopic Intermuscular Adipose Tissue in Individuals With Chronic Diseases: A Systematic

Mauro Tuñón-Suárez1, Alvaro Reyes-Ponce2, Rodrigo Godoy-Órdenes3

  • 1Exercise Physiology and Metabolism Laboratory, School of Kinesiology, Universidad Finis Terrae, Santiago, Chile.

Physical Therapy
|June 26, 2021
PubMed
Summary
This summary is machine-generated.

Moderate-intensity aerobic and combined exercise training effectively reduces intermuscular adipose tissue (IMAT) in adults with chronic diseases. This exercise-induced fat loss improves skeletal muscle health and function.

Keywords:
Chronic DiseaseExercise PhysiologyExercise TherapyIntermuscular Adipose TissueNoninvasive ImagingSarcopenia

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Area of Science:

  • Exercise Physiology
  • Skeletal Muscle Metabolism
  • Chronic Disease Management

Background:

  • Intermuscular adipose tissue (IMAT) accumulation in skeletal muscle is linked to muscle mass and strength loss, reduced physical performance, inflammation, and metabolic dysfunction in individuals with chronic conditions.
  • Addressing IMAT is crucial for maintaining skeletal muscle homeostasis and overall health in adult populations facing chronic diseases.

Purpose of the Study:

  • To systematically evaluate the impact of different exercise training modalities on intermuscular adipose tissue (IMAT) in adults with chronic diseases.
  • To synthesize evidence from randomized controlled trials (RCTs) to determine the efficacy of aerobic, resistance, or combined exercise on IMAT reduction.

Main Methods:

  • A comprehensive literature search identified RCTs assessing the effect of aerobic training (AET), resistance training (RT), or combined training (COM) on IMAT using noninvasive imaging (MRI/CT).
  • Data extraction followed the PICO(T)S framework, and study quality was assessed using the Cochrane risk of bias tool.
  • Meta-analysis calculated standardized effect sizes (ES) with 95% CIs, quantifying heterogeneity and exploring subgroup/meta-regression effects, with publication bias assessed via Egger's test.

Main Results:

  • Nineteen RCTs involving 962 adults with chronic conditions were analyzed, showing a small overall effect of exercise on reducing IMAT (ES = 0.24).
  • Moderate-intensity AET and COM demonstrated greater efficacy in reducing IMAT compared to RT.
  • Subgroup analyses indicated larger effects in studies using MRI, in middle-aged versus older adults, and in individuals with HIV compared to other diagnoses.

Conclusions:

  • Moderate-intensity aerobic exercise and combined training are effective in reducing IMAT in adults aged 18-65 with chronic diseases, associated with body weight and fat mass loss.
  • While exercise generally reduces IMAT, older, frail individuals or those with advanced disease stages may experience paradoxical IMAT accumulation.
  • Prescribed exercise, particularly moderate-intensity AET or COM, can reverse the detrimental effects of IMAT on skeletal muscle, highlighting its therapeutic role for physical therapists and healthcare professionals.