Boxing icon Emmanuel Steward is recovering after undergoing surgery to fix a stomach condition.

The revered trainer and commentator, who helped Thomas Hearns and Jimmy Paul land world championships in the 1980s, has been treated by his longtime physician for diverticulitis, according to his sister.

Steward, who currently trains world heavyweight champion Wladimir Klitschko and middleweight sensation Andy Lee, has been told to cut back on his workload.

His sister Diane Steward-Jones tells the Detroit Free Press newspaper, "Resting is somewhat alien to him, but he finally sees the wisdom in looking after himself and following doctor's orders to get the rest he so richly deserves. Emanuel has spent decades taking care of not only the boxing needs of his fighters, but also their housing, transportation and health needs.

"Emanuel always thought of himself as superhuman. His humanness has caught up with him. He told me he can't wait to get back to the gym and his kids, but he just needs to rest before he does that.

"He is taking care of himself right now for the first time in his life. His workload had been absolutely brutal."