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 C. Vitamin C is a nutrient that is needed to manufacture the elastic fibers collagen and elastin, which keep the walls of the veins and arteries flexible and strong. This helps the vascular walls resist pressure and contract after dilating due to blood flow.It also keeps the valves of the veins from leaking.itamin C. Vitamin C is a nutrient that is needed to manufacture the elastic fibers collagen and elastin, which keep the walls of the veins and arteries flexible and strong. This helps the vascular walls resist pressure and contract after dilating due to blood flow.