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).
This nutrient is particularly important for the synthesis of collagen, which forms the basis of a matrix of fibers that gives your skin support. Vitamin C is also a powerful antioxidant that helps shield your cells from oxidative damage. Women require 75 milligrams of vitamin C daily, while men need 90 milligrams.