An injury will occur when a tissue is subjected to an irritation (over-load, pressure, blow etc.). All injuries release an acute inflammatory reaction that is crucial for the healing of the injury. The acute inflammation can develop into a chronic inflammation, which represents a serious complication, if the irritation (over-load) continues. The chronic inflammation acts by breaking down the tissue (causing a weakening of the tendons, cartilage, etc.) and results in pain which will necessitate a break in training involving further weakening of the muscles, tendons and bones.
The complaint is termed “inflammation”, and the condition has no relation to “infection” and penicillin has consequently no effect whatsoever.