Help, really struggling with VO2max intervals. Age 50+, 3.7 w/kg, nearly finished SSB MV2.
I can nail 4x10min near threshold (Darwin at 101%) or 5x15mim sweet spot (Tallac +3 at 101%). They need focus, but I can complete them.
With VO2max work I dread them. There is no way I could complete 6x3 min at 120% as proscribed. Today I went for Dade -1 instead (9x2min) but needed to drop to 95% to complete this. I can do the 1min on 1 min off type workout, but anything over 90sec and I really struggle. Failure is usually brought about by the legs just refusing to spin even with full focus, despite normally having a high cadence in the 95-105rpm range.
Given I can do the longer sweet sport or threshold work, I am beginning to see this as a limiter to increasing my FTP.
Any advice borne out of experience on how to overcome this?