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Volume: 38
Number: 4
Index: December 2010
Clinical Focus:Respiratory Care
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December 2010
Clinical Focus: Respiratory Medicine
  • Asthma and the athlete
    • Vocal cord dysfunction
    • Exercise-induced asthma
    • Exercise-induced bronchospasm
  • COPD
    • Obesity and COPD
    • Relationship between COPD and nutrition intake
  • Treatment options for steroid-induced osteoporosis in men
  • Treatments for asthma
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    • Metered-dose vs other types of inhalers
  • Respiratory infections in winter sports athletes
  • Asthma in elite athletes
  • Pulmonary rehabilitation and physical activity
  • Fitness and long-term oxygen therapy/lung transplantation
  • Airflow function and the metabolic syndrome
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doi: 10.3810/PSM.2009.04.1679
The Physician and Sportsmedicine: Volume 37: No.1
Intramyocellular Lipids: Effect of Age, Obesity, and Exercise
Ruth M. Franklin, MS And Jill A. Kanaley, PhD
Abstract: Obese individuals with metabolic syndrome are predicted to have a 5 times greater risk of developing type 2 diabetes and a 3 times greater risk of myocardial infarction than those without metabolic syndrome. Many obese patients with metabolic risk factors have an accumulation of triglycerides within the skeletal muscle fibers, ie, intramyocellular lipids (IMCL). Individuals with metabolic syndrome have a greater risk of developing IMCL depots, and these stores are related to increased cardiovascular risk and type 2 diabetes. A few studies have shown, moreover, that aging seems to result in an increase in IMCL stores, although little is known about how exercise influences these stores. In healthy young individuals, IMCL depots have been shown to decrease in response to acute exercise, but very little is known about the effects of exercise training on IMCL depots in obese individuals. Understanding how IMCL depots can be altered with exercise (both resistance and aerobic exercise) in older and obese individuals seems to be critical in preventing disease.

Keywords: intramyocellular lipids; skeletal muscle; magnetic resonance imaging; spectroscopy; metabolic syndrome

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