Spp2 se

TopCat was referring to what Flash said about the options of running, not volume.

Everything depends what you can handle re: volume.
When you are going to do SE runs, speed needs to be fully developed so the speed end. is a proper speed end. and not just done in the 250/300 pace.

I think Ikh was doing those 3x3x80 pretty fast is on 7-8/15min recovery, so no jogging. Maybe Ikh went through 80-100-120 there is no info in that particular post, its quite possible that Ikh performed those runs to smooth up the transition to 120s.

There you go plenty valuable info in those two posts about: how and when to do what, to maximise already developed speed.