What is it about?

Exhaled air contains aerosol particles that might be During normal breathing, aerosol particles are produced in the lungs and exhaled. The concentration of these particles in the exhaled air increases strongly during physical exercise. In addition, the volume of ventilated air increases. The exhaled aerosol particles of infected persons may contain pathogens such as SARS-CoV-2 or influenza viruses. Indoor concentrations of these pathogens can rise if ventilation is poor, increasing the risk of infection for others. In endurance sports, the ventilation of the participants is greater than in weight training. As a result, more particles are emitted and healthy subjects inhale more potential virus-carrying aerosols.

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Why is it important?

Sport is generally recommended as beneficial to health by the World Health Organization. In times of high infection rates and high disease incidence, our results help to assess the risk of infection of athletes in gyms.

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This page is a summary of: Respiratory aerosol particle emission and simulated infection risk is greater during indoor endurance than resistance exercise, Proceedings of the National Academy of Sciences, February 2023, Proceedings of the National Academy of Sciences, DOI: 10.1073/pnas.2220882120.
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