I've been reading this thread and associated documents with interest. I can't rationalize buying a power meter, but I am interested in performance optimization. It looks to me like one can use Performance Manager with just a HRM, generating TRIMPS instead of TSS. But that's just the input side. One also wants an output side - how has one's TRIMPS or TSS affected one's output? It looks to me like there's no output side unless one is using a power meter. Is so? If so, not that attractive for the HRM only user like myself.
Thanks.
I use speed at various HRs on my rollers for the output side in my own training and TRIMPS for the input side.