ANYONE MOTIVATED IN fitness is likely to go into a form of denial about the messages their body gives them, especially when it is telling them to STOP!
Indeed, resting is just as important as the actual exercising. The body needs to physically assimilate the rigors of a good workout, and it needs time for this. Even if there is no apparent injury or sudden pain during exercise, muscles can tear, ligaments and tendons can get over-stretched, and bursa (the fluid sacs that lubricate the joints) can get inflamed by constant repetitions. Resting is the only way to allow any of these potential problems from getting worse, or chronic.
I have spoken to several older fitness professionals and experienced yoga teachers and they all agree it’s very rare to not be carrying a niggling pain or injury.