This answer is for a skinny guy who wants to gain muscle. It may not apply to jacobjacob, who mentions losing fat too.
I prefer Lyle McDonald’s exhaustively pedantic blog for a comprehensive theoretical foundation on general athletic training. A comprehensive theoretical foundation and a practical instruction set are different things. After going on and on about details, Lyle McDonald recommends Mark Rippetoe’s Starting Strength course for practical strength/muscle building. I, a (formerly) skinny male in my 20s, found Mark Rippetoe’s simple Starting Strength course to be extremely effective when I combined it with GOMAD. GOMAD stands for Gallon Of (Whole) Milk A Day. You eat normally (or more than normal) plus you drink a gallon of whole milk each day. GOMAD is cheap, simple and satisfies the most ridiculous protein and calorie macro requirements.
All that really matters is you get enough protein and calories. Are you a lactose-tolerant skinny male in your 20s living in the USA who has trouble putting on weight? If so, then GOMAD will get the job done. It is cheap, simple and effective. (A little creatine supplement wouldn’t hurt but isn’t critical.) If you are not a lactose-tolerant skinny male in your 20s living in the USA then IDK.
If you are skinny guy who wants to gain muscle then barbell lifting is usually the best way to do this. There are several slightly different routines you could achieve similar results with. Mark Rippetoe’s Starting Strength is one course you could use. But you don’t have to use his. Anything is fine as long as it features high intensity low reps of deadlift, back squats (or similar leg exercises) and pressing motions (overhead press, bench press, etc.). A pulling motion like chin-ups is good too but not quite as important as the others.
This answer is for a skinny guy who wants to gain muscle. It may not apply to jacobjacob, who mentions losing fat too.
I prefer Lyle McDonald’s exhaustively pedantic blog for a comprehensive theoretical foundation on general athletic training. A comprehensive theoretical foundation and a practical instruction set are different things. After going on and on about details, Lyle McDonald recommends Mark Rippetoe’s Starting Strength course for practical strength/muscle building. I, a (formerly) skinny male in my 20s, found Mark Rippetoe’s simple Starting Strength course to be extremely effective when I combined it with GOMAD. GOMAD stands for Gallon Of (Whole) Milk A Day. You eat normally (or more than normal) plus you drink a gallon of whole milk each day. GOMAD is cheap, simple and satisfies the most ridiculous protein and calorie macro requirements.
All that really matters is you get enough protein and calories. Are you a lactose-tolerant skinny male in your 20s living in the USA who has trouble putting on weight? If so, then GOMAD will get the job done. It is cheap, simple and effective. (A little creatine supplement wouldn’t hurt but isn’t critical.) If you are not a lactose-tolerant skinny male in your 20s living in the USA then IDK.
If you are skinny guy who wants to gain muscle then barbell lifting is usually the best way to do this. There are several slightly different routines you could achieve similar results with. Mark Rippetoe’s Starting Strength is one course you could use. But you don’t have to use his. Anything is fine as long as it features high intensity low reps of deadlift, back squats (or similar leg exercises) and pressing motions (overhead press, bench press, etc.). A pulling motion like chin-ups is good too but not quite as important as the others.