Understanding Exercise Intolerance And Low Fitness Levels

https://www.news-medical.net/health/Exercise-tolerance-Causes-testing-and-how-to-improve-performance.aspx Exercise tolerance captures how efficiently the body delivers and utilizes oxygen during physical activity, making it a powerful indicator of functional capacity, disease burden, and response to rehabilitation. Its decline reflects complex, multisystem impairments, while improvements signal meaningful gains in physiological resilience and long-term health.