I am a skinny guy who wish to gain more muscle. Just out of curiosity, I wonder how many reps would would begin to show results.
As someone already posted, 3 sets X 8-12 reps with about two minutes rest periods between sets is used for bulding muscle, hypertrophy.
Along with that, you got to eat more. Six meals/snacks a day. Calculate how many calories you consume during a day and then add 500 more calores to what you are eating.
Next, consume a workout beverage before, during and after your workout. This enhances recovery.
I am currently doing :
150 reps of shrugs
100 reps of curls
30 reps of sit ups
50 reps of lateral raises
20 reps of push ups
100 reps of bend over rows
This is too many reps.
Use compound exercises, select one from the menue below.
Legs/Lower Back: Squats, Leg Press, Step Ups, Lunge, Deadlift.
Chest/Triceps/Shoulders: Bench press, Incline Press, Decline Press
Lats/Bicpes: Bent Over Row or Lat Pulldowns.
Doing one of the exercises from each of the above catagories works just about every musch in the body. These compound exercises also maximize muscle growth.