I over train my CNS very easily. This leads to rapid heart beat, insomnia, problems sleeping & catching a cold. I have to tread a fine line between training hard & not pushing it too much, since this will lead to CNS problems. I don't have problems with over training my actual muscles, mainly my CNS. Is there anything drug or supplement I can take to help this. I really want to be able to push myself more & not be so susceptible to CNS over training problems.