In a lot of countries walking, biking and jogging are welcome activities in these times of COVID-19. However, it is important to note that you need to avoid each other’s slipstream when doing these activities. This comes out of the result of a study by the KU Leuven (Belgium) and TU Eindhoven (Netherlands). The typical social distancing rule is 1 to 2 meter when you are standing still but not when someone is walking, running or biking. When someone during a run breathes, sneezes or coughs, those particles stay behind in the air. The person running behind you in the so-called slip-stream goes through this cloud of droplets. The researchers simulated the saliva particles of persons during movements. Based on the results, the safest distance for walking is 4 to 5 meter, running and slow biking is 10 meter and fast biking is 20 meter away from each other’s slip streams.