The best swimmers among female Ironman triathletes complete the swimming portion of the event in 50 minutes to an hour. At the World Championship, the cutoff time for all competitors is two hours, 20 minutes. Any participant who fails to complete the 2.2-mile swim within that time is eliminated from the competition.
Vitamin K: One of two naturally occurring fat-soluble vitamins (vitamin K1 and vitamin K2) needed for the clotting of blood because of an essential role in the production of prothrombin (a clotting factor).
Vitamin D, a fat soluble vitamin, is the only vitamin able to be synthesized by the human body. Ultraviolet rays from the sun activates a form of cholesterol in the skin and changes it to Vitamin D. Vitamin D helps support a stable nervous system and the normal functioning of the heart.