VKR and lower back!

[ROCKETW19]

i was doin knee raises today for the first time and i felt my lower back clickin on the way down i could even hear it. im guessin its cuzz there is no cartlidge between my discs (yes my lower back always hurts) my question should i stop doin them am i fuckin something up worse or is it no big deal i can handel the pain i just dont want anything worse back there then it already is.

[BBAddict]

I had the same problem when I used a standard VKR, but if I do it with something like the Ab Sling where you're hanging (not supporting yourself from your lower arms) I don't have that problem. It's tough to replace that for lower ab strength.