I am on cross country and I have been for four years. I am in very good shape, do not have any health problems that I know of am not overweight don t drink alcohol or do drugs. During and after many of my runs My legs shake uncontrollably for a long time even after I do cool down. They shake in between each step I make and I have no idea why I shake so badly. I do not have anixety and this happens rain at 30 degrees with no jacket on or when it is 110 degrees. Most days I drink 2 liters a day before practice. I have been tested for anemia and I am not anemic. Why do I shake during my runs whether a hard run or not. I almost always shake when I do hills repeats even if the repeats arent fast but I also shake during flat practices. I also always do at least a mile warm Up and stretch. What is wrong with me?