Felt a burning sensation in lower back on bike ride uphill a week ago, followed by spasm. Got a bit better, then felt it again on easier hill yesterday. Then it moved into the hip - piriformis area, and down the front of the right quad. It's all in spasm now, and quite painful. I had this injury for about 8 years and have only been pain free for maybe the last two. Really sorry to have it back!
Mostly just faded away. It's not perfect, but much less annoying than a few weeks ago. Tried to be gentle with it, maintain posture, avoid undue strain.