Yes, massage really helps the most, using hands or a vibrating massager on low, and if I do feel a little spasm/strain I massage lower back right away and it resets lower back without any lingering pain
But again, the funny thing is lower back is not sore, and that is why I never used to massage it when I had lower back spasms.
Now when I am sitting on a stool for a while, I will massage my lower back even though I have no discomfort or pain, and then when I stand up I feel fine.