Following medical articles are provided with the kindly help of Beat Knechtle.

	AN ULTRATRIATHLON LEADS TO A DECREASE OF BODY FAT AND SKELETAL MUSCLE MASS—THE TRIPLE IRON TRIATHLON AUSTRIA 2006 - B. Knechtle et al.
	Athletic Performance and Weight Changes during the “Marathon of Sands” in Athletes Well-trained in Endurance - H.Zouhal et al.
	CYCLING AND RUNNING PERFORMANCE, NOT ANTHROPOMETRIC FACTORS, ARE ASSOCIATED WITH RACE PERFORMANCE IN A TRIPLE IRON TRIATHLON - B. Knechtle et al.
	Decrease in body fat during an ultra-endurance triathlon is associated with race intensity - B. Knechtle et al.
	Effect of a multistage ultra-endurance triathlon on body composition: World Challenge Deca Iron Triathlon 2006 - B. Knechtle et al.
	Effects of a 3-Month Endurance Event on Physical Performance and Body Composition: The G2 Trans-Greenland Expedition - Peter N. Frykman et al.
	Effects of a Deca Iron Triathlon on Body Composition – A Case Study - B. Knechtle et al.
	EFFECTS OF AN EXTREME ENDURANCE RACE ON ENERGY BALANCE AND BODY COMPOSITION - A CASE STUDY - Stefan Bircher et al.
	Energy balance during two days of continuous stationary cycling - Ian B. Stewart et al.
	Energy Turnover at the Race Across AMerica (RAAM) – a Case Report - B. Knechtle et al.
	Exercise-Induced Hyponatremia in Ultradistance Triathletes Is Caused By Inappropriate Fluid Retention - Dale B. Speedy et al.
	Fluid Balance During and After an Ironman Triathlon - Dale B. Speedy et al.
	Food habits and use of supplements in ultra- endurance cyclists – the Race Across AMerica (RAAM) 2006 - B. Knechtle et al.
	Haemoglobin, Haematocrit and Red Blood Cell Indices in Elite Cyclists. Are the Control Values for Blood Testing Valid? - Y. O. Schumacher et al.
	Heamatocrit in Elite Athletes - P.C.J. Vergouwen et al.
	How Valid is the Determination of Hematocrit Values to Detect Blood Manipulations? - W. Schmidt et al.
	Influence of anthropometry on race performance in ultra-endurance triathletes in the longest triathlon in North America - Dr Beat Knechtle et al.
	Modelling the Transfers of Training Effects on Performance in Elite Triathletes - G. P. Millet et al.
	No Effect of Pre Race Supplementation with Vitamins and Minerals on Performance in an Ultra-Endurance Race - Frohnauer, Armin et al.
	THE EFFECTS OF RUNNING 1,200 KM WITHIN 17 DAYS ON BODY COMPOSITION IN A FEMALE ULTRARUNNER—DEUTSCHLANDLAUF 2007 - B. Knechtle et al.
	Upper arm circumference is associated with race performance in ultra-endurance runners - B. Knechtle et al.
	Vitamins, minerals and race performance in ultra-endurance runners – Deutschlandlauf 2006 - B. Knechtle et al.
	Weight changes, medical complications, and performance during an Ironman triathlon - K. A. Sharwood et al.
	Weight Changes, Sodium Levels, and Performance in the South African Ironman Triathlon - Karen Sharwood et al.

Pictures for the background are taken at the Double Virginia 2008 (with friendly permission from Harry Gerwien) and taken at the Double Hungary 2008