Genetics and hormones play the most important role in how much muscle you can grow and how thin you can be. Without confusing you, I will explain how different hormones are activated and how they contribute to different actions in your body. There are friendly hormones that will promote muscle growth and you will lose weight and there are destructive hormones that will eat your muscle and keep you fat.
The endocrine system is responsible for the release of hormones, which are simply chemical messengers that tell your body to build muscle, burn muscle, gain fat, lose fat and dozens of other responses.
El sistema endocrino es el responsable de la liberación de las hormonas, las cuales sencillamente son mensajeros químicos que le dicen a tu cuerpo que desarrolle músculo, queme músculo, gane grasa, pierda grasa y docenas de otras respuestas.