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They are only 60 second intervals at 120% of FTP (Top of VO2 Max), so they will be some work, but not terrible like a 3-minute version. The issue with this is the relatively short recovery and more tightly stacked aspect. That is how they work towards the aerobic demand/goal for the workout.
- My first thought is that you may be really good at these, but more likely that your FTP may be a bit low, at least with respect to top end VO2 Max.
- But again, the length of these on their own is actually quite short. I would expect to be a bit worked at the end of each full set, but it should be doable.
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See this post, and the related links to see how I like to explain the interval summary issues for short and sharp intervals.
- TLDR, don’t trust the interval data summary, look at the actual power graph for the real timing and effort you put out.
- Erg mode for short and sharp intervals - #18 by mcneese.chad