I have been progressing to more minimalistic shoes and, now I run completely in spikes or flats (mostly adidas cubato). My question is, do you ever loose that fast, sharp feeling you get when you put on a light pair of shoes? So far I feel sharp every day wearing flats but does this diminish over time?
Not really -- everyday feels like your barefoot. It was a concern of mine before going in -- that superlight raceday feel wouldn't be the same. In that sense it's not in that it's not jsut when you race; it's all the time. And that's fine. Less adjustment to make on race day.
yes your legs will get progressively heavier and eventually will be permanantly dead.