Definition of infirmary for English Language Learners. : a place where sick people stay and are cared for in a school, prison, summer camp, etc.
Torgan says delayed onset muscle soreness also has a repeated bouts effect. If someone does an activity, they will be inoculated for a few weeks to a few months -- the next time they do the activity, there will be less muscle tissue damage, less soreness, and a faster strength recovery..
What Causes Muscle Soreness After Exercise? Delayed onset muscle soreness is thought to be a result of microscopic tearing of the muscle fibers. The amount of tearing (and soreness) depends on how hard and how long you exercise and what type of exercise you do.