"In & Outs" and "Flying 20s" are two tools in the coaches/athletes toolbox that allow an athlete to work on different aspects of their race.
Charlie reccomends the use of "Flying 20s" at submaximal speed to emphasis, for example, stepping-over the support knee. "In & Outs" allow the athlete to experience speed without effort.
Question: As there can be an overlap between the two drills in terms of cues used by the athlete to execute them properly (e.g. stepping over and/or arm down). Is there a need to do both?