I've been doing pullups for the last couple of months, but I recently read something that said I might want to work pull downs instead until i get a little stronger. I can 'get' 5x4 on pullups, but I start failing and can't get a full ROM. Would it be better to use pulldowns to get the full ROM until I'm strong enough for pullups, or keep struggling with what I'm doing now? I'm much stronger with chins, and am about to start adding weight to my 5x5 on those.
If it helps, my full back workout consists of chins, supported rows, and dumbbell rows on Tues and pullups (mebbe pulldowns) cable rows, and deadlifts on Fridays.