I sort of failed today's workout, because I gave up on the cadence target . There were two Sweet Spot efforts of 12 minutes, with a cadence of 95. I don't think I've ever averaged 95 for that length of time in my life. A couple of minutes in, I knew I wasn't going to do it today either. I let the cadence slide away and kept the power going, it was much easier. For the second effort, I ignored the cadence altogether (and still got a gold star - so according to Zwift I didn't fail). The sprints, at higher powers and cadences, were fairly easy because they were short. I'm going to have some rest days from now on, starting tomorrow. I'll go back to five rides a week and see how I do. No days off, and fast spinning for long periods, clearly doesn't suit me. I'll keep trying with the cadences, but I'd rather finish the workout and hit the power targets than blow up completely part-way through a ride.