Slow twitch, tempo, GPP and SE

Tempo, SE and GPP can all increase the capillary bed which is desirable for sprinters, but can they also develop the slow twitch fibres too much? Any thoughts?

Nice thread, Richard! Hope it leads to some inteesting discussion.

Background reading:

I feel performing all of the above during winter will result in over development of the slow twitch fibres and type 11A also, but during the time it takes to reach peak in season, these endurance adaptions will have decreased to an optimum (continuing tempo allowed). I am thinking this applies more for 100m and 200m than 400m?

If the speed and volume of tempo are limited, there should be no problem and fibre conversion will be in the other direction, as a synergist to the speed/power work, for the reasons I outlined in the link above.