WATCH: Dad sets world record for fastest mile while pushing a stroller 

Former Miami University runner Stephen Biebelhausen ran a record-setting mile Saturday while pushing his baby in a stroller.

Biebelhausen, who’s originally from Rochester, Michigan, ran a 4:17 mile Saturday at the Guardian Mile in Cleveland. His time was about nine seconds faster than the previous Guinness World Record holder Silas Frantz, who ran a mile while pushing a stroller in 4:26 last summer.

From 2013 to 2016, Biebelhausen ran for Miami University of Ohio’s cross country and track teams while studying bioengineering and premedical studies. Now, a few years later and with a sidekick tagging along, he’s still pushing the limit in the running world.

Watch the video here: