It isn’t necessarily about how many reps you can do right off the bat. Rather, it is the form you use during the exercises. For instance, you don’t want to arch your back too much when lifting or else you put too much strain on your back and could injure yourself. Use mirrors to make sure your form is good. Some newcomers believe that those who are doing exercise in front of a mirror are really posing for their own self-esteem. Really, they are watching their form and making sure that they are doing the exercises correctly with personal trainer.