BjjBrick Q&A 2 Lower Back Pain and BJJ

I’m am a fresh blue belt age 40,
started Jits late, but it has changed
my life.
Question:
Is lower back pain normal when
starting this? I’m assuming it’s due
to posture from guard ect.
Injuries seem to slow my progress. Don’t
want to blame age but just a question.
Thanks and love ur vids.
Kamran
parkandroll.org