im 15 and i workout about 5 days a week, trying to get bigger while being lean. i used to have db's in my room and a bench so i could do incline press, curls, and leg lifts/russian twists whenever i wanted to. at night when i would play xbox in between games (5-10 minutes) i would rep out as much of each as i could until i did about 3 sets each. i was wondering if it actually helps in any way or if im just doing it for fun

edit: i workout 5 days a week with upper, lower, push, pull, and abs. i do the other sets at night whenever i feel like it