- Air pollution slows marathoners’ performance, increasing race times due to fine particulate matter in the air.
- Working out in polluted environments can compromise pulmonary and cardiovascular health, reducing the body’s ability to adapt.
- Monitoring the air, exercising early in the morning, and choosing green routes are effective strategies for limiting exposure to pollution.
In recent decades, air quality has received much attention due to stricter regulations and growing environmental awareness. However, air pollution remains a major issue, with serious effects on our health and the ecosystem. A recent study analyzed the impact of air quality on marathon performance, showing that high levels of fine particulate matter can negatively affect race times. But if air quality affects competition, what impact can it have on daily training?
The study: polluted air and race times
Research published in the Journal of Sports Medicine analyzed data from more than 2.5 million marathon runners who participated in races in the United States between 2003 and 2019. Scholars compared finish times with levels of fine particulate matter (PM2.5) along the course and found that air pollution slowed race times: for every 1 µg/m³ increase in fine particulate matter, men took an average of 32 seconds longer, while women took 25 seconds.
This effect was particularly evident in faster runners, probably because their higher oxygen consumption makes them more sensitive to pollutants. Fine particles, produced by the burning of fossil fuels and other sources, can reduce lung function, raise blood pressure, and cause vasoconstriction, thereby limiting athletic performance.
Training in polluted environments: risks and strategies
If air quality affects race performance, it is easy to imagine that it also impacts training, which is the basis of athletic preparation. Running in an environment with polluted air can increase the risk of respiratory problems, chronic inflammation, and oxidative stress, factors that can impair the body’s recovery and adaptive capacity.
Those who regularly exercise in cities with high levels of pollution may experience a reduction in lung capacity over time, resulting in a decline in performance. In addition, breathing fine particulate matter continuously may promote the onset of cardiovascular problems and increase the risk of chronic diseases.
To minimize these negative effects, some strategies can be adopted:
- Monitor air quality: use apps or websites that provide the Air Quality Index (AQI) to choose the best times to exercise outdoors. Levels between 0 and 50 are ideal, while levels above 100 can be problematic.
- Exercise early in the morning: pollution tends to accumulate throughout the day due to traffic and industrial activities. Running in the early hours of the day can reduce exposure to pollutants.
- Choose green routes: preferring parks, bike paths and green areas over congested urban streets is a good choice to reduce exposure to harmful agents.
- Indoor workout: on the worst days, when the air is particularly polluted, the treadmill, in the gym or at home, is a valid alternative.
Don’t let pollution slow you down
The study confirms that air quality can have a significant impact on marathoners’ performance, slowing finish times and negatively affecting cardiovascular and pulmonary function. But it is not just the race that is affected: training in polluted environments can have chronic effects on health and the ability to improve performance over time.
Adopting strategies to reduce exposure to pollution is critical to ensuring effective and safe workouts. With greater awareness and a more mindful approach, you can protect your health and improve your performance without letting poor air quality deter you. A small change in daily planning, such as choosing the right times to exercise or preferring less polluted routes, can make a big difference, allowing you to achieve the best results in the long run.