Dreaded Bonk

"Often, people associate the word “bonk” with “hitting the wall” during endurance events. For endurance athletes it is a sudden and overwhelming feeling of running out of energy. You were running or riding along at what seemed like a manageable pace, then seemingly without warning your legs turned to cement. With heavy legs, a body-wide feeling of fatigue and sometimes dizziness, you are forced to stop." [source: http://www.active.com/triathlon/Articles/Everything-You-Need-to-Know-About-the-Dreaded-Bonk.htm?cmp=306&memberid=29745281&lyrisid=22866001] --- Kjell