If these max speed development sessions (alactic sprints) are producing big recovery costs, most likely you are “embarrassing” your central nervous system. Take it aa assuring that you are performing the alactic work at more than the minimum effective dose to force adaptations.
Your max speed work is basically like plyimetrics, or weight lifting in motion.
Like a new high-intensity lifting session, when you get home from that first lift, you feel almost drunkenly clumsy from all that CNS fatigue. But then there is sort of a second wave of this felt-fatigue again after you reap the CNS adaptations from your first few sessions. what I mean is, you may then feel a second lull because your CNS got better at activating much faster than muscles have time to adapt yet. so your CNS becomes more ABLE than your musculature to perform the task of lifting, plyos, max speed dev. The result? That second wave of fatigue that is more a blend of CNS fatigue and perhaps DOMS. But then after all of this has had time to integrate through a meso cycle of supercompensation, then when you got to do these max speed sessions, you will be scratching your head wondering, “did I go hard enough?” In the same way you might have experienced thinking to is after a big workout that your body was well-adapted for.