About Sports Medicine provides quality information and advice for athletes, coaches and trainers to improve sports performance, prevent and treat sports injuries, train safely, understand sports nutrition and learn the latest sports training techniques.

Why do low oxygen levels cause altitude sickness?. Altitude.org is charity-funded and written by independent doctors.

The High Altitude Medicine Guide. These web pages provide information about altitude illness and other health issues affecting travellers to high mountainous regions of the world.

LifeScript is the #1 Website Dedicated to Women's Health. By publishing healthy recipes, workout tips, and daily inspirational mantras, LifeScript.com enables women to make better and more informed lifestyle choices.

The National Library of Medicine (NLM), on the campus of NIH in Bethesda, Maryland, is the world's largest medical library. It collects materials in all major areas of the health sciences and to a lesser degree in such areas as chemistry, physics, botany and zoology. The collections stand at 5 million items--books, journals, technical reports, manuscripts, microfilms, photographs and images. Housed within the Library is one of the world's finest medical history collections of old (pre-1914) and rare medical texts, manuscripts, and incunabula.

GORP.com is the best resource for outdoor travel guides, adventure travel trip planning, hiking and camping information and ideas, and national parks trip research. Get gear reviews, packing lists, trail maps, and expert advice for your next otudoor adventure.