Marieke Vervoort, Belgian Paralympic athlete has ended her life at the age of 40 through euthanasia (the practice of intentionally ending a life to relieve pain and suffering). She was suffering from a muscle disease that caused her constant pain, paralysis in her legs. She was diagnosed with the disease at the age of 14, after which she made her life in the sport and took part in basketball, swimming and triathlon in a wheelchair.
She won gold in the 100 meters and silver in the 200 meters at the 2012 London Games, while at the Rio Games 2016 she managed to win silver in the 400 meters and bronze in the 100 meters. She signed euthanasia documents in 2008, to allow a doctor to end her life.
Source: The BBC