Hmmm, last time I hit my hand with a hammer, it really hurt. Wonder what will happen this time, dang, ouch f... me that hurt.
If there's one thing I've figured out with backs, if something hurt my back last time, there's a damn good chance it'll do the same again, so just don't do that thing any more. If you insist on riding up that hill, change your gearing so you don't need to grind up, you need to change something in the configuration of the activity so the results aren't the same.