Classic blood doping—the injection of additional blood cells to increase oxygen in the muscle—is illegal in Olympic sports. Yet, legal blood doping is all the rage at the 2018 PyeongChang Olympics. Here is how it works.
Knees do not necessarily wear out evenly, sometimes one part of the knee is perfectly fine while another part is completely destroyed. If only part of the knee joint is worn out, why replace all of it?
The dreaded “hammy” is the tearing of the muscle or tendon fibers of the powerful hamstring muscles at the back of the leg. It’s dreaded because the pain is sharp, and the recovery can be long. Here is what’s known and what’s new: