Retired Jamaican sprinter Usain Bolt has been training to run the 800 meters for a promotional event. He’s riding his Peloton bike and running lap after lap. But the 34-year-old world record-holder insisted he isn’t leaving the door open for a comeback. Those days are over. He’s enjoying family life and producing music. Bolt says his best time in the 800 meters is 2 minutes, 5 seconds. But that was without track spikes. He thinks he can go faster during a promotional race on July 13. Bolt’s nearly 13-year reign as Olympic champion in the 100 and 200 will come to an end at the Tokyo Games.