Its what UPS preaches but does not really live by. Like when you call off work because your body has had enough and they try to force you to come to work so they can finish you off.
One of the things they taught us during feeder school was dead on wrong IMO. According to EVERY doctor I have ever talked you when you get a sprain, you put ice on in the FIRST 24 HOURS. Then you put on heat. A ups they say ice all the time.