Drag, or atmospheric resistance, is one of the greatest enemies of athletes in the Olympic Winter Games. Drag is a kind of friction that opposes athletes' movements through the air and slows them down. However, drag doesn't just affect athletes; it acts on any object moving through the air. I’ve noticed the effects of drag on cars. Newer cars with aerodynamically shaped fronts are less affected by drag than older cars with large, flat fronts. An aerodynamic shape reduces the drag by curving the air around the body of the car. The same principle applies to other vehicles too. For motorbikes, airplanes, and even ships, engineers try to design a shape that will keep drag at a minimum.
Recovery from a mild to moderate sprain following a knee hyperextension injury can take 2 to 4 weeks. It's important during this time to limit activities that can further strain the knee and to continue to manage swelling and pain (:
