Last Tuesday, I had my 8-week consultation with one of my gym's fitness trainers. This is a benefit of my gym membership, Any Time Fitness. During these 8-week consultations, the fitness trainer takes and records body measurements. Over the last five months, I have dropped my body weight from 247 lbs to 201 lbs. All of the gym staff, including this trainer, have been impressed and astonished with my progress. On Tuesday, the trainer happened to be eating his lunch which included large baked potato. I made a passing comment that the potato was poisonous to me. Now bear in mind, this trainer is a huge body builder and does competitions. Really quite impressive. He told me emphatically that you cannot build muscle without heavy loading of carbohydrates. This trainer is also working on a nutrition practitioner certification. So I am less inclined to dismiss his opinion as I would normally. How is heavy loading of carbohydrates necessary? Firstly, it is my understanding that carbohydrates are used exclusively for energy. So the dietary carbohydrates are not being converted into muscle tissue. I believe that some proteins get converted into muscle cells, but not carbs. One idea that I have on this is that excessive carbohydrates could give the body sufficient energy to allow for muscle activation which, as I understand it, allows for growth of muscles cells or tissue. So maybe the carbs just give one the energy to do a mechanical activity which benefits muscle growth? Another idea that I am wondering about based on some information that I have seen on this forum is that carbohydrates are necessary to activate the consumed proteins for skeletal muscle genesis and modulation. I don't know much about this idea, yet. I plan to explore this idea more. What other ideas or explanations are there? I am sure this topic is well explored in other threads; so please direct me to any that would be beneficial for me to review.