Creatine promotes muscle growth through several different factors. It stimulates protein synthesis and allows for an increased work load due to the increased energy content and delay in muscle fatigue. Also, as more creatine is absorbed in the muscle tissue, more water is brought into the muscle cell, thus increasing cell volume. This gives a full or pumped feel and look. When a muscle cell is hydrated, it triggers protein synthesis, minimizes protein breakdown, enhanced muscle growth occurs, and muscle fibers become larger and stronger.
As far as your biceps are concerned, you have to put size on everywhere else too. Plain and simple. A rule of thumb is 1" increase in circumference for every 15-20# gained. You need to train your entire body extremely hard with the same intensity, not just focus on arms.
PS - in the future, please post questions in the appropriate forums to allow for more responses. There is a nutrition forum for your 1st ? and a training forum for the second. Not a flame, just a word of advice.
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