When I first started training I never trained legs. When you get more into lifting, your diet evolves and so does your routine. Your legs will just have to play catch up.
Simple as, I was told once to do a maintenance style routine for my top half while I trained legs but I can do things at 70% 80% so I just hit my legs hard. For the first three months I trained them twice a week to get them started ( this was not at a heavy weight ) and then as they progressed I only train them once a week and now I look forward to leg day.
My legs are still playing catch up but they are no longer far behind!
