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.
There are two sources of this essential vitamin, including vitamin K1, or phylloquinone which is primarily found in green leafy vegetables and vitamin K2 or menaquinone which is synthesized by certain intestinal bacteria.
30. Vitamin K 1 (phylloquinone) is the main dietary form of the vitamin, but vitamin K 2 (menaquinone) has a stronger relationship to arterial calcification. 15. In one study, people with the highest intake of vitamin K 2 were 57% less likely to die of coronary heart disease compared with those with the lowest intake.itamin K 1 (phylloquinone) is the main dietary form of the vitamin, but vitamin K 2 (menaquinone) has a stronger relationship to arterial calcification.