This could be paranoia but I've noticed through my life that there appears to be a correlation between getting off my backside and trying to improve things and an increase in things trying to knock me backwards.
Fix a few niggly things on car = major part of car fails
Start a keep fit regime = contract ebola or something similar
This morning I've got up to force myself into my second bike ride = snowing outside ('un'lucky if it snows down here once during the winter).
I shake my fist at the malevolent beast that does these things. I'm going anyway.
Life's a laugh and then you die