Never assume that every pain in the knee is runner's knee. Because the knee is a very complex joint, it is always best to have any prolonged pain checked by your doctor to rule out a more serious medical condition that can be aggravated by running or with exercise.
Drivers who sneeze behind the wheel cause 2,500 accidents a WEEK - now experts say they should stay off the roads. 1  Motorists can travel 50ft blind when sneezing. 2  Drivers with severe colds 'should stay off the roads'.  Study suggests those with the sniffles should leave four extra car lengths for slower reaction times.
So you have a reversal in the dependence of range on size.. Specifically, the study finds that droplets 100 micrometers -- or millionths of a meter -- in diameter travel five times farther than previously estimated, while droplets 10 micrometers in diameter travel 200 times farther. Droplets less than 50 micrometers in size can frequently remain airborne long enough to reach ceiling ventilation units. A cough or sneeze is a multiphase turbulent buoyant cloud, as the researchers term it in the paper, because the cloud mixes with surrounding air before its payload of liquid droplets falls out, evaporates into solid residues, or both.