I like Block Periodization for a few reasons. First of all, I have seen massive gains in a short period of time using it, compared to the old methods. I mean, 30 watts higher FTP in 3 weeks of training, compared to twelve weeks for similar gains previously? Secondly, it forces the athlete to be more aware of the messages that his/her body is sending, which is a crucial skill to master, especially in this day and age of data and number-crunching; which, by the way, I am one of the number-crunchers by nature. Thirdly, it allows much more flexibility in an athlete's schedule, making it easier to adapt to illness/injury or an unexpected period of free time. Finally, it just makes sense. To get any form of adaption, the athlete must overload the system that they want to train. It follows that the best way to do that, is to completely overload it, instead of slowly applying the pressure and then backing off when there might not have been enough pressure applied, and then only wait long enough for the body to "catch up" before overloading the fitter system again, boosting it to another level. This is why I have made Block Periodization the foundation of my coaching philosophy. If you would like to try it out, feel free to contact me .
Here are the links to external sources and guides:
Vladimir Issurin's Summary of Block Periodization
Guide on Power Based Training
Guidelines on Intervals to exhaustion:
