I am underweight. How do I gain weight and muscle? This thread for example. Triggers me so hard. If someone else asks why they are not gaining anything or just very slowly, staff comes and marks it as DUPLICATE. It is not always a duplicate if a person doesn't gain or just gains very slowly. It's a unique case, which has to be handled in another way, and not just by saying "lift heavy, have good diet and good sleep" That's not all about it. I am the best example of that. Won't introduce that here. Read my other threads.
So, please stop marking such questions as duplicates if they are not duplicates. Some people can lift heavy and eat good and sleep good and still not gaining. And no, don't come now with "thats just you, you cannot change your genes etc." That is probably a excuse. You just don't wanna say, that you have no idea what is going on. You don't want to say that you don't know anything about fitness.
My wishes are that you stop voting a answer which is incorrect.
To gain good weight, to bulk, to add muscle, you need to:
Stimulate growth by lifting heavy Provide fuel for growth by eating a lot Prioritize your goal by getting your life in order Most healthy people who do these things gain weight. Mostly muscle.
^ This is not correct. For some this can work. But some probably does not mean 90% of humanity.