Cardiff Half Marathon: Training for the event with dwarfism
Liam, who has dwarfism, explains the challenge facing him as he prepared to run the Cardiff Half Marathon.
The 17-year-old health and social care student completed the course in three hours, 44 minutes.
You can watch how he and the rest of 'Alfie's Army' got on the iPlayer.
If you want to find out how to get into running or mass participation running events, check out our inclusive Get Inspired guides.