I am currently trying to bulk, but I cant throw in deads for mass because my flexibility is sooo bad. My general flexability is not that bad just my hamstrings-specifically the part right behind my knee. I do stretch at least a few days/week, but I can't come close to touching my toes. I know genetics plays a PART of the problem, because my father and brother are worse than me...but I'm sure I can work past this with help.
Any suggestions?