Bolt wants to go for four gold medals at next summer’s London Olympics, adding the 4×400 relay to his usual schedule of three sprint events.

Sprint legend Michael Johnson believes Usain Bolt should consider moving up to 400m after an impressive relay display. Bolt clocked a 43.58-second split in a 4×400 relay at a local meet in Jamaica 10 days ago.

Bolt and Johnson Bolt broke Johnson’s 200m world record in 2008. Sprint legend Michael Johnson believes Usain Bolt should consider moving up to 400m after an impressive relay display. Bolt clocked a 43.58-second split in a 4×400 relay …