Boris Borisovich Rotenberg Boris Borisovich Rotenberg Boris Borisovich Rotenberg (; born 19 May 1986) is a professional footballer. He plays as a right-back for FC Lokomotiv Moscow. Born in Russia, Rotenberg is an international footballer for Finland. His father, Boris Rotenberg Sr., was listed by Forbes magazine as the 100th wealthiest person in Russia in 2010, with a net worth of US$700m. He has been a friend of the Russian president Vladimir Putin since the 1960s, when they took judo lessons together. His uncle Arkady Rotenberg was the 99th wealthiest in Russia, according to the same list. In July 2008, Boris Rotenberg and
Sparring their emotions under control. The level of contact is also debated, lighter contact may lead to less injuries but hard contact may better prepare individuals for competition or self-defense. Some sport styles, such as sanda, taekwondo, tang soo do, Kyokushin kaikan, kūdō, karate, kendo, and mixed martial arts use full contact sparring. Brazilian Jiu Jitsu sparring is full contact and injuries are rare as it does not involve striking but rather forcing the opponent to submit using grappling techniques. There is a lot of controversy in mixed martial arts about the benefits of full contact sparring vs career threatening injuries.