Its wierd. Why do some people like to bring their mp3 players for the 2.4km run? The only reason i can think of is show off. mp3 players only add weight. High songs? If you were half dead during the last 800m of the 2.4km i dont think blasting those songs at full volume can wake the dead. It distracts your concentration too. Verdict: Useless, gives one a disadvantage over those who are running free of any load.