Ghost runs in marathon

Spotted this "Ghost" running in Stirling's first ever marathon. 
 It  attracted over 6,000 entires and one  surprise for me was the number of young women who were running who were  overweight and unfit.

Maybe they had taken up the marathon as a challenge  which is great but I do wonder if they were putting their health at risk.

Many years ago I used to run in 10K and now I am paying the price with damaged knees, the result of training on roads.