are many reps good or bad?

Question

ok.. if im doing squats for example.... is it good to do like 500?
and pushups is it good to do like sets of 100 (in a row) and situps 500 in a row..... ect... allot of reps for excersizes
i hear people say that its pointless to do that because it doesnt work
but i think about it and wonder how on earth it doesnt work...
your overusing the muslce.. theres no way its not gonna get bigger/stronger.....
i dont know for sure so thats why im asking

Answer 1

500!?! No!

Repetitive motion problems will cause you pain later in life.

For building muscle the recommendation is to pick a weight that is heavy enough that you can't do 7 reps with it, but which you can do at least 4 reps with. If 500 reps on squats worked then you could build massive muscles just by walking up and down stairs all day.

Start reading this program:
http://www.ast-ss.com/training/training_intro.asp