Hi. My PB is 4:48 this year at the grand old age of 49 and I’ve gone sub 5 in 3 of my last 5 70.3’s (my two slower ones were one pre knee surgery and one post surgery). I’ve learned a lot along the way, but this post was never about me - it was to try and help others. It’s those people that go 5:40 and dream of going sub 5 that we can collectively help. Pat.