Tim Cohen joined our BETA program, hoping to improve his half marathon/marathon time through altitude training. Prior to altitude training, he was regularly running tempo miles in the high 6:40s. After 5 weeks and 9 sessions in the altitude room, participating in the Altitude Booster program, he says a 6:30 mile felt comfortable and now his tempo runs typically consist of tempo miles in the low 6:20s. In fact, during his final test, his pace improved 17 seconds per mile. At the end of the program, he dropped 5 minutes off his previous half marathon PR in 2017 to achieve a 1:30.32. He looks forward to an equally impressive marathon time at the Chicago Marathon in October.