This paper presents Running Gestures, an interaction technique that relies on foot gestures while running. A prototype and evaluation of one of the proposed gestures, a mid-stride skip, is presented in detail. The developed prototype is used by runners to change the currently playing music track, and the evaluation compares users' performance in relation to other methods of changing tracks while running. The results show that Running Gestures is a highly effective way of interacting with a system when running. Author Keywords Interaction technique, running, music player, foot gestures ACM Classification Keywords H.5.2 Input devices and strategies, Ergonomics General Terms Design, Music, Sports