Cardiovascular benefits and risks across the physical activity continuum.

Area of Science:

• Cardiology
• Exercise Physiology
• Public Health

Background:

• Sedentary behavior is a growing global concern, linked to increased cardiovascular event risk.
• Endurance exercise participation has surged, prompting investigation into potential health benefit attenuation at high volumes.

Purpose of the Study:

• To review recent literature on the dose-response relationship between physical activity and cardiovascular outcomes.
• To evaluate the impact of varying physical activity levels, from sedentary behavior to extreme exercise, on cardiovascular health.

Main Methods:

• Systematic review of recent publications.
• Analysis of studies assessing physical (in)activity dose and cardiovascular endpoints.
• Evaluation of sedentary behavior, endurance exercise, and high-intensity activity impacts.

Main Results:

• Breaking up sedentary time mitigates negative health effects.
• Low-to-moderate physical activity, especially high-intensity, significantly reduces cardiovascular and all-cause mortality.
• High exercise volumes show diminishing returns, with extreme levels offering no further benefit and potentially increasing atrial fibrillation risk, though overall life expectancy remains superior.

Conclusions:

• Physical activity is crucial for cardiovascular health, with benefits generally increasing with dose.
• Strategies to reduce sedentary time are effective.
• While extreme exercise may have specific risks, moderate to high levels are associated with better longevity.