SYDNEY (AP) — The Australian Sports Anti-Doping Authority says Polish breaststroker Michal Zawadka has been suspended for four years for a positive test during the New South Wales short-course swimming championships last November.

ASADA said Wednesday that Swimming Australia had imposed the ban, which is backdated to Nov. 11, 2015. It said the positive test was for Clenbuterol, an anabolic steroid, and methylhexaneamine, which is a stimulant banned during competition only.

Zawadka had raced in seven meets in Australia since 2014, including as a visiting swimmer at the 2014 Australian short course titles. He was the 2014 Australian champion in the 50-meter short course breaststroke.

Four years is the maximum suspension for a first-time offender. ASADA said Zawadka had waived his right to a hearing and accepted the mandatory sanction.