Originally Answered: How do I gain a lot of weight quickly?
It really depends on your metabolism type. There are three scientific classifications for metabolism. Endomorphism, Mesomorph, and Ectomorph. To explain them simply, the endomorph has trouble losing weight, the mesomorph can gain or lose weight at their discretion, and the ectomorph can eat everything in sight and not gain a pound. Assuming your not the endomorph or mesomorph, the ectomorph has to eat complex carbs like starches and red meats, because their metabolic rate is very high. So stick to thing like potatoes and lean red meats like sirloin and take extra protein. And if your trying to gain muscle mass I have found that full body workouts every other day work best. I am an ectomorph as well and put on 25lbs of muscle thanks to this information. Hope this helps.