how many reps should i do during muscle building?

Answer 1

Only 3 sets of 15 reps of each routine (12 reps is the minimum amount required for the muscle to register and activate chemical and energy reaction to the wieght resistance required to increase muscle size)

Do upper body work-out one day & alter w/ lower body work-out on alternate days

Work out only for 2 weeks consecutively at maximum & do not exceed lifting fatigue level

Rest your muscle groups on the 3rd week, focusing on cardiovascular training only (walking, jogging, swimming, cycling, etc.)

On 4th week repeat

This regiment will build more mass & not over strain, damage & over work your muscle groups

Guys who over work their routine & exceed maximum lifting fatigue on a daily basis without muscle rest and recuperation do not build maximum mass & have a very stringy look to their muscle groups

Answer 2

it generally depends on the weight you're lifting, personally I lift 50 lbs. for 3 sets with 12 reps each set.

Answer 3

use more weight and less reps to build muscle mass and less weight and more reps to tone muscles.