Thanks, Dave! I'm very familiar with that chart. I was first introduced to it in Coggan's Training with Power book. That's why I want to believe that SST is all I really need over the winter. One hour a day six days per week was the plan. My only interest is time trials so, this may become more of my regular in season routine as well - until I get closer to my A priority events. I've read elsewhere that some say SST should only be done a few times a week, but the logic does not sit well with me as an hour session of SST (2x25 min at SST) elicits around 75 TSS. That should be sustainable with no issue six or even seven days per week. Am I missing something here?