At the risk of starting a wild fire I want to ask a follow up question to the original post. There were a couple of differing views to having an aggressive training plan. This question is directed toward those who saw the approach as being one that would pay off in gains on the bike but warned that it should not be so rigid that it caused over training but that it should be flexible enough to allow me to listen to my body and make adjustments accordingly. This approach makes since and is something that I have been doing by monitoring my morning at rest heart rate. If this rate is elevated on workout days I throw in an extra recovery day and put off the effort day and then adjust the schedule accordingly. The core of this question now becomes a matter of the approach to the Lactate Threshold intervals. One response gave an example of the LT intervals used in workouts. They were 2x20+ min intervals. Right now I am doing 10 sets of 6 min. efforts at LT to LT plus five beats per min with 60 sec recovery between efforts. What LT intervals do others use and why? What are the advantages and disadvantages to each of these and any other approach?