UBC research has found that exerting too much energy while walking or biking on city streets can increase the amount of airborne pollutants you inhale, the Daily Mail reported.
“The faster you move, the harder you breathe and the more pollution you could potentially inhale, but you also are exposed to traffic for a shorter period of time,” said Alex Bigazzi, a civil engineering professor. “This analysis shows where the sweet spot is.”
Bigazzi found that cyclists should ride between 12kph and 20kph on city roads while pedestrians should keep between 2kph and 6kph.
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