I am in this difficult situation now - i had my eyes on the TP100 for next year. Runnng had been a contentious subject for just over a year now with my OH, before that it wasn't an issue for some reason. I was running before I met him, I guess maybe i began to train a little harder and push myself a little more.
I've mentioned the TP100 a few times and the atmosphere suddenly goes very cold - he can't resent the training hours, as I fit them in around my daily commute (he works late anyway and he always come home to a clean house and dinner on the table).
He says his concern is that i never know when to stop - he wants to know when will i have enough? Will I be able to stop at 100 miles or will i want to go further? And I cant promise that I won't.
His lack of support has already made me feel obliged to cancel my Ironman effort for this year, and now the half ironman too. Doing this without his support is miserable.
He runs himself, although "only" 2-3 marathons a year, and he's a better runner than me too - a sub 3 marathon is easy for him. However i cant persuade him to try ultras, i think he sees them as dangerous and inviting injury - despite the fact ive actually been injury free for well over a year (*touches all wood available*).
I've just returned from a multi-day (2 days, 64 miles) and things were a little bit rocky on my return, i won first lady but he really wasn't interested.
I guess maybe he has a point, maybe i should set myself a limit? Enjoying this thread though, nice to hear from others in the same boat.