Really? Are you basing all this on Junebug's single post??
get your facts right. Dimitri did not start in his 40ties and got on this level in 6 years.
This is a first fact you've missed, hence, it is a false info you are presenting here to the World.
I am 48 today. Yep, my birthday is on 30th.
If did not break a clavicle, would be free of kiting injuries for the last 7 years.
Riding Edges, semi aggresive, meaning 1-1.5hrs per sesh. I took me 7 years to learn 720 front roll and to jump 8m off flat water. With a downloop.
Doing 100 to 200 hours per year, only in shallows. Shallows are heaps more higher risk.
So, it is possible to get on some levels but only if one lives near water and never going out when more than 30kn.
Just like Toby, I love big kites.
Oh, what is a fitness? We are kiting to be fit.