My brother shared this with me...thought it was very interesting.
"NOT training everyday leads to more injuries! IF you train everyday then your entire body is fatigued. Muscles, tendons, cartilage, ligaments, etc. When you train every other day, then the muscles and avascular tissues don't recover at the same pace. What happens is the muscles become fresh and recover but all the connective tissue is NOT. When the additional stress put on these weakened tissues (that never really got a chance to recover) by fresh muscles = injury. Lifting everyday keeps everything in a state that is equal and consistent within the system. A balance or harmony within. The fatigued muscles can't contract enough to harm the other tissues. The weak link moves from body part to body part, and in a sense is not letting the other parts max so that's when they are resting!" ---- John Broz