Citation needed.
(FWIW, I always use a helmet except when I use shared bikes, which is rare, only a few times a year. I get on one of my own bikes, helmeted, hundreds of times a year.)
(FWIW, I always use a helmet except when I use shared bikes, which is rare, only a few times a year. I get on one of my own bikes, helmeted, hundreds of times a year.)
You might actually be right here. I do not know. Either way, don't expect "I really don't need to cite anything" to convince anybody serious.
Strangely, in Denmark most cyclists do wear a helmet. To me it's very inconvenient. E.g. where to store the damn thing when going anywhere?