Ironman triathletes must complete the bicycle course at the World Championships in 10 hours, 30 minutes. The top women, however, will finish the bike race in about half that time. As with the swimming cutoff, failure to achieve the bicycle cutoff time eliminates the triathlete from the event.
In the past, the requirements for vitamin K only considered its classical function in coagulation; an RDA was given for vitamin K in the United States (54, 58) and a safe and adequate intake level was given in the United Kingdom (65).
Vitamin K is a fat-soluble vitamin that plays a role in blood clotting. Vitamin K activates the protein that clots the blood. It is also needed for the synthesis of bone proteins. A vitamin K deficiency can lead to heart disease, weakened bones, tooth decay and cancer.