I wonder what happens if you do a downhill sprint followed immediately by an uphill sprint. Like a \_/ running slope.
have a 'client athlete' that's pissing you off? load him up on heavy sled sprints, very heavy, so he's about 10-20% of the speed he could achieve for that distance (say 20 yards).. hit a bunch of sled sprints, say 5-10.. now, tell him to sprint maximally for ~20 yards etc, no 'warmup/re-acclimation sprints', pretty high of a chance he eats it (falls down)..
i've seen it happen quite a few times.
your post just reminded me of that.. if you ran uphill first, for say 5-10 sprints, then if you ran downhill, it would be pretty catastrophic imo.. the cns would overexagerate the lean, and going downhill, that would be very bad haha.. i know your post was the opposite of that, but whatever just found that funny.
pc