Training for 8 min races

Thank you

Thank you
Just one more clarification please
regarding zone 2, is it the best to use the heart rate based or maybe FTP based?
the pure zone 2 is derived from the lactate level (based on the podcast i copying below), ofc i do not have ways to assess this.
Any thoughts on this?
https://peterattiamd.com/inigosanmillan/

https://podcastnotes.org/the-drive-with-dr-peter-attia/201-inigo-san-millan-ph-d-pt-2-deep-dive-back-into-zone-2-the-drive-with-peter-attia/

Many thanks
Renata

55-75% of FTP if you have a power meter. Though I also find RPE is a very good gauge for z2 training, everybody who has spent time training for endurance sports has evolved a pretty good feel for that intensity which isn’t easy, but feels like it can be sustained indefinitely.

Thank you