Doping refers to the use of performance-enhancing substances in competitive sports. The history of doping dates back to ancient times when Egyptian slaves and Greek athletes consumed substances to boost energy and endurance. In modern times, cyclists and other athletes in the late 19th century used stimulants like caffeine and cocaine. Common performance-enhancing substances include amphetamines, which stimulate the central nervous system and increase energy but also dehydration risk, and narcotics, which alter behavior and increase heart rate and breathing. Blood doping involves boosting red blood cells to enhance oxygen carrying capacity to muscles. However, doping increases health risks such as heart attack, blood clots, and dehydration.

1. DOPING: WHY DO THEY DO IT ? Dídac Pedret Mar Karim Mahoub Palacios

2. DOPING The doping it's the use of performance enhancing substances in elite sport with competitive purposes. They increase the sport's people's efficiency.

3. DOPING - History Egyptian slaves ate elixirs for decrease stress.

4. Greek athletes ate energy increasing substances before the activity

5. The slaves of Incas worked better after chewing coca leaves About a century ago, cyclists and other sport's people started to use enhancing substances like strychnine, caffeine, cocaine, for an advantage.

6. Amphetamines Their effects are stimulation of the central nervous system, higher energy, and feelings of competence and power. They increase risk of dehydration.

7. Narcotics Narcotics altere the behavior, incease the heart rate and the respiratory capacity.