I always thought they were a terrible idea for anyone but beginners.
Who knows best what your body is capable of?
a) You, on the day in question.
b) Somebody else, months in advance.
Yeh, but training plans have thair advantages. If you go how you feel on the day how often would you get out? Nice pain-free, body feels great runs are very much a rarity for elite athletes - and anyone over elite athlete age who tries to run regularly. And there’s those lovely days when you feel shite sat at work but you get running and feel amazing - they are great.
My body is a bone idle, perpetually whining couch potato (oi! These legs really hurt! Your knees are waaaay too old to run this often! Calves have gone on strike and refuse to do another step without stretching! Blah, blah, blah!). My body thinks I am capable of not a lot. That’s why I never listen to it.
Which is why I was up at 4am before doing Greenmantle with stiff calves, googling ‘how much does a ruptured Achilles hurt?’ Before discovering the answer is not a lot, and deciding to risk it anyway...
pain-free, body feels great runs
Not sure what one of those is, but I do still get out - after a certain age you just can't let the facts get in the way of what you want to do.