Everything You Know About Marathons Is Wrong..

New York Marathon is Today..

Most runners have heard the marathon lore: Your time will be best if the weather on race day is about 55 degrees and overcast, or even drizzly. And avoid dehydration at all costs, because it will cause your muscles to cramp and you could collapse at the finish line.

But none of that is true, researchers said at a recent marathon medicine and science conference in Chicago. Read On..