For a good physical and mental balance, it is important to do sports on a regular basis. But it turns out that some sports activities are more dangerous than others. 1. Base jumping Extreme sports enthusiasts practice base jumping to enjoy the joys of freefall. In France, there are about 300 regular practit ioners. According to a survey carried out in 2011 by National Geographic, a dozen sportsmen and women die every year throughout the world. 2. Speleological diving Decompression is the main danger divers are wary of. But the inability to surface instantaneously, darkness and strong currents can also cause death. 3. Mountaineering High mountain climbing is one of the most dangerous sports in the world. Experienced or amateur, the practitioner is not able to master all the natural disasters that can occur. This is why it is never recommended to practice this off-piste activity. 4. Extreme Skiing Skiing on steep slopes is a discipline similar to ski touring, but the slopes to be c...