Ninja Koskinen is an athlete from Pietarsaari, born in 2005, who is currently studying in Turku. Koskinen started CrossFit, or functional sports, in 2021. He has quickly achieved significant success, including two gold medals, two silver medals, and two bronze medals at the World Championships in functional sports. Ninja has competed successfully in Finland's toughest CrossFit competitions in both the RX and Elite series, and in 2023 he won the RX series of the Turun Tuomiopäivä -competition.