This question cuts to the heart of the greatest limitation of the prefabricated training plans that I have created in such abundance. Whereas my training plans treat individual peak races in isolation, in the real world most competitive runners take a seasonal approach to the sport, giving more or less equal importance to several races taking place between spring and fall. There’s nothing wrong with this approach. In fact, it is the racing approach that most elite runners (except marathon specialists) practice too. The question is, how does one practice a seasonal approach to racing most effectively? Simple: Heed the following three simple guidelines.
In November 1942, the Italian cyclist Fausto Coppi took "seven packets of amphetamine" to beat the world hour record on the track.  In 1960, the Danish rider Knud Enemark Jensen collapsed during the 100 km team time trial at the Olympic Games in Rome and died later in hospital. The autopsy showed he had taken amphetamine and another drug, Ronicol , which dilates the blood vessels. The chairman of the Dutch cycling federation, Piet van Dijk, said of Rome that "dope – whole cartloads – [were] used in such royal quantities."