protein such as salmon and on the day of the marathon, take potassium because if it is low, take a banana, because you can get muscle craps player in the marathon. be careful with that. gatorade has the electro lights. >> during the race, hydrate. any extreme exercise, six to eight ounces of waters, figure with potassium is key. be prepared. do not be a weekend war your and start doing a marathon. you have to prepare with 15 miles to 25 mile as week six months in advance and be careful and you will get less injuries. >> energy bars? people are taking the protein or energy bars right before. does that help? >> not really. what does help is the electro lights. cliff bars have the