Dyspraxia

Dyspraxia was a co-ordination disorder. Ryan Sinclair had dyspraxia, and as a result, he struggled to ride a bicycle. (TV: The Woman Who Fell to Earth) He also had trouble with ladders. (TV: The Ghost Monument)

By age 19, Ryan was able to climb ladders without aid, but this was a challenge, and it took him time. He did not like having to do so under pressure. (TV: The Ghost Monument) After the death of his grandmother Grace, Ryan pushed himself harder, and with newfound resilience, slowly improved at riding a bike without falling. (TV: The Woman Who Fell to Earth)