It was what I call TTIs (threshold tolerance intervals), which were done as two 20-min efforts, with about a 5-min easy riding in between each effort. They are very hard going, ridden at time trial pace. I've written about these plenty before and I've been doing a block of them lately.
As many of you know, I use a power meter on my bike to help monitor my effort as well as record my performance. I've been doing this for many years.
My average power for each TTI today was 314 watts & 313 watts respectively.
That exceeds my all time previous best 2x20-min TTIs (313W & 310W) in January-2007.
That's two years six months after my amputation and one year five months after I attempted to ride for the first time on an indoor trainer (10-min at 100W).
Do the work, and you will improve. Even if you are missing a bit of leg.