Weightlifting works your heart and lungs too, duh. A better term for what people refer to as “doing cardio” is “aerobic training.” But since I’m not totally anal, I’ll mostly stick with the common vernacular.
This is all about weights vs. cardio, like you only have one choice, and no one has ever decided that maybe they could do both, or something.
Each has its own merits, but a lot of the debate has to do with body composition, so in any analysis that compares the two it is critical to also analyze the effect these two forms of exercise have on diet.
Check out this article for all the details!