Realistically, it is not possible to convert a slow runner into a top performer, but it certainly is possible to make your dog more competitive with proper conditioning methods. There are similarities between conditioning a human athlete and conditioning a Greyhound. In each case, a degree of discipline centered around a training schedule is required. The important point to remember is that the active canine athlete should have daily exercise in a secure hazard free area.
Greyhounds are no different.
The time of year can dictate certain changes to a training schedule. In the spring, after a long winter lay-off, increase sprinting frequency to twice per week to build up the heart and lung capacity. Also, 2-3 days rest prior to the event is important for maximum performance. Likewise, 2-3 days rest following the meet is necessary to rest sore muscles. If you have ever run in competition, you can appreciate the importance of this rest both physically and mentally.