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Gene-environment interactions and the response to exercise.

H Montgomery1, D Brull

  • 1UCL Cardiovascular Genetics, Rayne Institute, London.

International Journal of Experimental Pathology
|February 13, 2001
PubMed
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Heart failure symptoms stem from poor muscle efficiency, not just low cardiac output. Regular exercise improves skeletal muscle performance, potentially via local renin-angiotensin systems and angiotensin-converting enzyme (ACE) activity, explaining ACE inhibitor benefits.

Area of Science:

  • Cardiology
  • Exercise Physiology
  • Biochemistry

Background:

  • Heart failure symptoms like breathlessness and fatigue often stem from impaired peripheral muscle function and metabolic inefficiency.
  • Reduced cardiac output is not the sole cause of these debilitating symptoms.

Purpose of the Study:

  • To explore the link between skeletal muscle efficiency and heart failure symptoms.
  • To investigate the role of local tissue renin-angiotensin systems and angiotensin-converting enzyme (ACE) in modulating muscle performance.
  • To understand the mechanisms behind the therapeutic benefits of ACE inhibition in heart failure.

Main Methods:

  • Analysis of existing data on skeletal muscle performance and metabolic efficiency in heart failure patients.
  • Review of studies investigating the impact of regular training on muscle function.

Related Experiment Videos

  • Examination of research on local renin-angiotensin system activity and ACE levels in muscle tissue.

    • Main Results:

    • Regular exercise training enhances skeletal muscle performance and improves metabolic efficiency.
    • These improvements in muscle function appear to be influenced by local tissue renin-angiotensin systems.
    • Local angiotensin-converting enzyme (ACE) activity plays a key role in modulating these training-induced adaptations.

    Conclusions:

    • Peripheral muscle impairment and metabolic inefficiency are significant contributors to heart failure symptoms.
    • Exercise-induced improvements in skeletal muscle efficiency are modulated by local ACE activity.
    • These findings provide a mechanistic explanation for the clinical efficacy of ACE inhibitors in managing heart failure.