While it might seem more functional than a crunch, it’s not necessarily better. “Recent research has shown that Russian twists are more harmful than beneficial ,” says James Thomas, a Les Mills national trainer based in New York City.2 Şub 2018
While it might seem more functional than a crunch, it’s not necessarily better. “Recent research has shown that Russian twists are more harmful than beneficial ,” says James Thomas, a Les Mills national trainer based in New York City.2 Şub 2018