KB pops a calf muscle... Forced to retire!
Here's some information provided by KB about his injury:
Calf strains are a common injury. This injury was first described in 1883 in association with tennis and is commonly called tennis leg. The classic presentation is of a middle-aged male tennis player who suddenly extends the knee with the foot in dorsiflexion, resulting in immediate pain, disability, and swelling. Pain and disability can last months to years depending on the severity and effectiveness of initial treatment. The gastrocnemius is considered at high risk for strains because it crosses two joints (the knee and ankle) and has a high density of type two fast twitch muscle fibers. The combination of biarthrodial architecture leading to excessive stretch and rapid forceful contraction of type two muscle fibers results in strain. This mechanism of injury conjures up the image of a cracking whip. Consequently, strains of the gastrocnemius have historically been called coup de fouet or snap of the whip.
