Sorry, I’ve read tab 4 and all levels multiple times. Here’s the statement I’m confused by:

Select a weight that allows you to hit the target repetitions on the first set of that exercise. You’ll probably do fewer reps on subsequent sets. Keep going until you hit the designated number, no matter how many sets it takes.

Now… what is the “designated number” If first set is 20 reps, 2nd=18 then is 3rd supposed to = 2? how many times am I supposed to hit ‘20 reps’ if the exercise sheet has 12 sets… how many total reps? is ‘total reps’ the “designated number”?

If I’m supposed to get 20 reps, I think I understand if I get say 10, then I’m supposed to do as many sets after that to get to 20. Then am I done and next exercise? Two total sets of 20?