hapakun saidYep more reps, less weight = lean muscle (ex: marathon runners)
More weight, less reps= More Mass (ex: Sprinters)
Actually, that's not true. There are two kinds of muscular hypertrophy, and you would do well to study about both. myofibrillated hypertrophy isn't size, but is dense muscle like you'd see in a power lifter. sacroplasmic hypertrophy is more about endurance, and what you'll see in competitive bodybuilder. They are EXTREMELY fit as well as STRONG at that level.
More specific to size is calories. If you eat more than you expend, you'll get bigger. If you don't, you'll get smaller.
Note that cyclists have HUGE legs, and, yet, so do football players. Note that your examples are flawed. Yet,....powerlifters often have lean, but small, legs. You gave some bad advice.
Sacroplasmic hypertrophy is about calories and load type. Many power lifters don't have it, but, are very strong, and do low rep work. Bodybuilders have more variance in their training that's not so sports and strength specified.
I'm afraid you need to study up on this a bit.
If a person doesn't eat enough, they won't get big. That's how it works. Eating is most of the game.
Xian_buff was right to correct you. He's correct.