Former shot put world champion Christina Schwanitz has brought her retirement forward from the end of the year. “That was my last competition today,” the 36-year-old told reporters after finishing third at the German indoor championships on Saturday. The world championships in Eugene, Oregon in July were meant to be her major swansong. She took gold at the 2015 edition in Beijing. She had planned to quit after last year’s Olympics in Tokyo but an early exit in qualifying made her think again.