Brock Lesnar is ready to resume training to defend his UFC heavyweight title after a serious intestinal problem derailed his career and endangered his life.

Lesnar hasn't been in the octagon since defending his title at UFC 100 last July, when he beat Frank Mir. He is expected to return this summer, likely fighting the winner of Mir's March 27 bout with Shane Carwin.

Lesnar spent several months struggling with diverticulitis, a swelling of a pouch in the intestinal wall. He lost 40 pounds and had a major scare while hunting in Canada before getting treatment in North Dakota and at the Mayo Clinic.

The former professional wrestler says he has changed his diet and is thrilled to resume his career.

Lesnar is considered UFC's top pay-per-view draw.

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