Background: Yesterday, I completed Tallac + 2, which is 4 x 15 minutes at 88-94% FTP, with 6-minute recoveries between intervals.
Today, I completed Monitor + 4, which is 10x6-minute intervals (or rather 5 sets of 2x6 minute intervals) at 88-94% FTP and 1-minute recoveries separate the intervals and 2-minute recoveries between sets of intervals.
Even though both workouts include doing Sweet Spot work at 88-94% FTP and total in 60 mins of work at this intensity, I completed Monitor feeling much better than Tallac. I was struggling quite a bit after Tallac actually, and I was feeling ok and ready for more after Monitor.
Question: with described feelings, does Monitor (or more shorter intervals in general) yield the same benefits for me as Tallac (less longer intervals), since the total workload is the same, or should I work on longer intervals?
So is the MED (minimum effective dose) of shorter intervals different than the MED of longers intervals and should I concentrate on longer intervals or doing more than 10 shorter ones?