When you want to build more muscles quickly you will need to do alot of things. First and foremost is you will need to be sure you are eating correctly. You want to eat healthy foods that are good for your body but you also need foods that promote muscle growth like amino acids and protein. This is the most efficient way to stop slow muscle growth and promote healthy growth. You will need good muscle building workouts that allow you to both tone up and build muscle safely. A good workout will include proper rest between sessions and a good plan.