It may be a play on words but there is a difference between running hot and recovery. Running hot is a lot more serious of a condition that getting tired from working out and making a recovery. Recovery is the true mark of conditioning, and that pretty much covers all sports endeavors, the dogs no different. The idea is to push them to the tired point, just short of running hot, watching the recovery and then doing the same again. The idea is to mark times between length of effort, recovery and length of effort. For numbers sake and just for easy math the dog is an all out blur for five minutes, breaks and recovers in two minutes then goes all out again for four more minutes. Next week he should maybe go all out for six minutes, recover in less than two and then go again for five. Over time the periods of all out work will lengthen and the recovery time will shorten. Meaning he will be able to deliver the mail longer than his counterpart, and when he breaks to recover he will not have to have the mail delivered to him for very long. So recovery time and running hot are two completely different items. EWO