Look up the Armstrong method for pullups if you're trying to get your pull-up numbers up.Did 7 pull-ups today. I think it's easier when my body is warmed up. Being older you are working against your stiff tendon and ligaments unless you are warmed up. Also I never believed in neurological aspect of strength training. It takes a bit to wake up my nervous system to want to work hard. Otherwise I just feel tired without even being fatigued if that makes sense.
Anyway, I pretty happy to be back to my previous peak. I think the swimming kept my back muscle strong.