Yah, I know .
.....I'll go on a short run today to test it out. I should probably adopt the Skedaddle protocol and only report positive results! We're all getting tired of this, right? Truthful reporting has its limits.
Sometimes, but I don't think you whine. It's important to know that humans among us get all kind of funky tweaks all the time, that we all take breaks, that we get ill, that it's not magic. The people I knwo who don't work out regularly see me as this magical paragon of motivation with a body that doesn't get tired or hurt, who just feels like going out in to the cold dark winter to run and that I don't have to work myself up to it, that we all have to work hard to make time in our schedules to create positive habits.
Also, remember, at certain ages, doing nothing can lead to just as many if not more injuries (and one would argue, more serious ones long term) than doing too much.
Positive spin: think of all the bad things (sore back, aches pains of all kinds, lack of flexibility, etc) that you could be feelign right now if you weren't trying to keep up with exercise.