If you haven't lifted before and just want to get fit, go for the Nautilis type equipement and use 3 reps of 10.
if you decide to be a body builder or want big muscles, you'll need to look into useing free weights and a pyramid method for reps.
I always set my weight by lifting until my muscles couldn't lift anymore when I approached the 10th count on my 3rd rep.
As a rule of thumb high reps of lower weight= toning, lower reps of higher weight=building.
John 21:3
Simon Peter said to them, "I am going fishing." They said to him, "We are going with you also." They went out and immediately got into the boat, and that night they caught nothing.
And we act like this Nightstalking thing is new.
For some excitment, read the next verse. A special guest arrived, they filled their coolers and had a fish fry on the beach...in the morning. My kind of people.- Bowfin