text: since i have been lifting weights i have been getting much stronger but not bigger. why? i am pretty content with getting stronger rather than bigger. i was just curious to know why i haven't gained much mass. i usually increase the weight slowly every time i visit the gym and don't really concentrate on high amounts of reps. really no more than 8 reps of each lift for three sets. sometimes i do 10 reps. i am guessing that what i eat also has alot to do with this. i haven't increased my calorie intake. anyways, i was just hoping someone with some experience might know the true answer to my question. thank you. change your routine.  your body becomes accustomed to the same movements over time and becomes more eficent at doing them.  find new excersises that target same muscle groups or change your hand positions do 5 sets of 5 for a couple weeks then go back to 3 sets of 8-10. take at least one day off before hitting the same muscle group again.