Athletic? I used to get E minus for physical education at school and would fall over laughing if anyone desribed me as an athlete.I did eventuially get a semi repsectable 10k and marathon time but feel that is within the capacity of anyone provided they train hard enough.
My most glorious moment was an "athletics" comeback at the age of 44 when I signed up to a new club and big things were expected of me at my first race,the Barrow 6,a short county road race held in freezing fog in January.I started well,went through the first mile with the leaders in 5.12 and then blew up.A mile later later the club chairman,61 years old,red faced and as fat as a pig,came jogging past me with a knowing look.But I found reserves I didn't know I had and took on the fight to catch this old git.Eventually I managed to catch him a mile from the finish and kept him at bay over the last 400 meters.It was hardest effort I have ever had to make for a mediocre 141st place out of 500 starters and an embarassing time of 41.40secs.
One thing people seem to forget is that the longer the distance the less athletics abilty you need.Most people would be struggling to run a 30 minute 10k but plenty of "ordinary" runners,say 4hr-4.30hr marathon time could get round a 100 mile course such as the South Downs Way in under 30 hours provied they were up for it which is the primary requirement on these sort of events.