pr100 wrote:
I can do it now at 46 with minutes to spare, not sure what the youngest age at which I could do it was... my fitness has been up and down over the years (and I've never been fast) so it's not an easy thing to remember.
(Ed Whitlock did 42 at age 80 a couple of weeks ago.)
I hope you mean 4-6 and not actually 46, because that would be amazing