2 hour sweetspot workout + 1 hour Z2 as alternative for long Z2 rides

[Bbt67]

I PM’d the same idea to the OP, I agree with this…

@Bbt67

A low carb 3 hour ride indoors with a couple of optional 20 or 30 minute tempo intervals would IMO more closely replicate the same as a 4 - 5 hour Z2 ride outdoors as the strain on the body would be similar.

[old_but_not_dead_yet]

IIRC, Chris Boardman achieved quite a bit of success without ever doing really long rides.