Conditioning theory

I'm pretty much brand new to thinking about training methods and found the description of different stages of training very interesting and helpful - but am wondering if this is still in line with accepted theory today. And if so, can anyone give some idea of what the different stages would look like in terms of actual swim sets? For example, what might some typical swim sets in stage 1 - the "transition and basic preparatory phases," where "the anaerobic threshold (ANThreshold) should be trained to its highest level" - look like; and how would these be different from sets for stage 2 - meant "to develop the aerobic capacity (VO2max) to its fullest" - and so on? But if this article is no longer up-to-date, can anyone point me to a trusty resource that offers a good basic overview of stages of training and how to design sets for those stages? (Perhaps just a link on this website?) Thanks for posting this article and for any further suggestions anyone might have.

I'm pretty much brand new to thinking about training methods and found the description of different stages of training very interesting and helpful - but am wondering if this is still in line with accepted theory today. And if so, can anyone give some idea of what the different stages would look like in terms of actual swim sets? For example, what might some typical swim sets in stage 1 - the "transition and basic preparatory phases," where "the anaerobic threshold (ANThreshold) should be trained to its highest level" - look like; and how would these be different from sets for stage 2 - meant "to develop the aerobic capacity (VO2max) to its fullest" - and so on? But if this article is no longer up-to-date, can anyone point me to a trusty resource that offers a good basic overview of stages of training and how to design sets for those stages? (Perhaps just a link on this website?) Thanks for posting this article and for any further suggestions anyone might have.