Abîme This is the act of using ropes, harnesses and ladders to descend an abîme. This is the most popular activity besides the actual exploration of caves. It is also the most dangerous activity to do in a cave. The biggest danger comes from using poor ropes and ladders for rappelling down shafts. Many amateurs make this mistake and it leads to the most cave deaths. An extreme sport and requiring a person to stand at the entrance of an abîme and jump into the opening while pulling a parachute before hitting the cave floor. This is highly dangerous and should
Physical Activity Guidelines for Americans can produce long-term health benefits and reduce the risk of many diseases. The messages from the Physical Activity Guidelines are also found in the Dietary Guidelines for Americans which provide recommendations for healthy food choices and regular physical activity. Health professionals and policymakers are the primary audiences for the Physical Activity Guidelines for Americans. However, the information is useful for anyone interested in improving the health of his/her community members and other individuals. The Physical Activity Guidelines for Americans were released on October 7, 2008 and are based on a comprehensive review of scientific research about physical activity and health.