I did not know that this style was called Pose running (slightly leaning forward, pulling feet up to let gravity propel you forward), but that was exactly how we were taught during a sports camp in Kenya where they had a few of Kenya's star marathon runners as teachers.
Because of a big knee injury (three surgeries) I had stopped running, but this method was so low impact that I was able to build running back up to around 10-15 k in reasonable speed without pain.
this is what we use to run any distance. it's called 'pose' running. works wonders for bber types who don't normally run and have more explosive strength than endurance.