Speed suits & altitude rooms - how Kerr plans to beat mile world record

Josh Kerr has announced his intention to break Hicham El Guerrouj's mile world record at the London Diamond League meeting on July 18. Kerr plans to use speed suits and altitude training rooms as part of his preparation strategy. El Guerrouj's mile world record has stood as one of athletics' most celebrated marks, and Kerr's attempt at the London event represents a highly anticipated challenge.