I've heard that hitting a heavy bag is taxing enough that it is easy to overtrain using it, especially for beginners.
How much rest should the average person (i.e. NOT a boxer who grew up hitting things) take in between intense heavy bag sessions to let the muscles, joints, tendons etc. recover?
On a similar note, what caution signs should someone look for to avoid injury/overtraining on the heavy bag? I know wrist pain is something to look for. Anything else?