When I want to go really fast I pedal more "round" and add a horizontal force vector at the dead spots at 12 and 6 (mostly 12 of course because the scraping the mud with an extended leg is not going to produce much power but I try).
I really try to have force on the pedals during the whole circle (I probably don't succeed but I try). this does feel very powerfull and I am very fast like this for about two minutes but then my legs really start to burn like crazy and lactic acid shoots in my legs. probably that non stop tension is killing my legs and increase lactic acid.
I sometimes do this for some time (for example I like to spin up a couple hundred meters long hill with a 110 cadence in a small gear like that) and it does give me a boost but then I really need a break.
I really try to have force on the pedals during the whole circle (I probably don't succeed but I try). this does feel very powerfull and I am very fast like this for about two minutes but then my legs really start to burn like crazy and lactic acid shoots in my legs. probably that non stop tension is killing my legs and increase lactic acid.
I sometimes do this for some time (for example I like to spin up a couple hundred meters long hill with a 110 cadence in a small gear like that) and it does give me a boost but then I really need a break.