Hi , need help on SL DL. I couldn't get pass my knees without rounding my back. Im not flexible enough to reach the mid-shins. So, I've been doing till knee level. Is it ok to keep on doing it as time passes, I might eventually get more flexible?

Doing SLDL because of ALLPRO's SBR.
http://forum.bodybuilding.com/showthread.php?t=155009423