Is 118 too light? What's the weight for most of the top guys in the world?
"Word before yesterday’s race was that Mo had dropped about four pounds in body weight – down to 118 lbs.now — as he increased his mileage during his three month stint in Iten, Kenya in preparation for London."
http://tonireavis.com/2014/03/17/the-fall-the-faint-the-form/