I have a mild chronic kidney disease, through which I have an elevated creatinine level and decreased kidney function. Due to this, I cannot take good amounts of protein, and need to follow a relatively low-protein diet to decrease the load on the kidneys. I currently do kick-boxing, and 2 / 3 times a week of circuit resistance training.
Reading on the topic, a lot of forums / information mention quite a good amount of protein per body weight. Is this absolutely necessary to increase in muscle size? Is there anything I can do to help, without actually including excessive amounts of protein in my diet?
My main aim is to increase in muscle size / mass, rather than strength, although it would be beneficial if I were to increase both. In general, I don't think I have a bad shape or form, and already have a good amount of muscle size but would like to increase it .
Another thing of curiosity I would like to ask about is - I read about creatine supplements, which are somewhat related to creatinine level. I have a naturally high creatinine level due to the mild kidney disease, which hovers in the 130 - 150 range. Does this have any to do with muscle size? If some people actually take supplements to increase, could this actually be of any relevance?