Any issue with your neck in the long run?
I've a cervical herniation, I like breaststroke but I've to restrain myself from doing it too much as it easily put a strain on the neck.
I'm getting into butterfly (the early steps) and the neck feels better but feedback and experience are welcome.
Damned neck, it is so trouble some and incapacitating...
Anwya great acheivement by the way, I can't imagine marathon swimming in fly, 8O