disease

Exercise Intolerance in Companion Animals

Exercise intolerance is a non-specific clinical sign characterized by an animal's inability to perform or sustain physical activity appropriate for its age, breed, and fitness level. This article outlines the multi-systemic origins of this condition and provides a diagnostic framework for the veterinary practitioner.

VetiPedia AIApril 6, 2026288 views
general

Clinical summary

Clinical signs
Early fatigue, tachypnea, dyspnea, collapse (syncope), muscle tremors, reluctance to move, coughing, cyanosis.
Possible causes
Cardiovascular (congenital defects, valvular disease, arrhythmias), Respiratory (airway obstruction, parenchymal disease, pleural space disease), Hematologic (anemia, polycythemia), Endocrine (hypothyroidism, hyperadrenocorticism, Addison's disease), Musculoskeletal (arthritis, myopathies, neuropathies).
Diagnostic approach
Comprehensive physical exam, CBC/Chemistry/Urinalysis, thoracic radiography, echocardiography, blood pressure measurement, and specialized testing (e.g., ACTH stimulation, thyroid panels, electromyography).
Management
Direct treatment towards the primary systemic disorder. Includes oxygen therapy, medical management of heart failure, hormonal replacement, or surgical intervention for structural defects.

References

  1. [1]Nelson, R.W. and Couto, C.G.. Small Animal Internal Medicine (2019)

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