Board Thread:Naruto Discussions/@comment-24531362-20140723084127/@comment-24519434-20140727032640

Sparkling Girl wrote: Well the thing about kakashi nd obito running while sasuke nd naruto couldn't move ... i think mayb its cuz of the chakra ... like the more chakra u have its harder to move... because they have large amount of chakra so they are strongly attracted to the ground.... nd in obito nd kakashi's case they are already at their limits so they don't have much chakra that's y it was kinda easy to move ... well still its a guess, i am not sure though ...

Kinda makes sense, chakra has been referred to as Heavy several times.