Six-time Olympic gold medal cyclist Sir Chris Hoy has revealed that his cancer diagnosis is terminal.

Hoy sat down with The Sunday Times to discuss his previous diagnosis and announce for the first time that his cancer was terminal, going into detail during the interview about his experience since being diagnosed.

Doctors have estimated that Hoy has between two and four years to live.

The 48-year-old former cyclist previously announced his diagnosis in February, writing in an Instagram post at the time that he was “receiving treatment, including chemotherapy, which is thankfully going really well.”

“I’m optimistic, positive and surrounded by love for which I’m truly grateful. I currently feel fine. I am continuing to work, ride my bike and live my life as normal,” he added in the post. 

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Hoy explained that he felt a pain in his shoulder in September 2023 and initially thought that he was “just getting a bit old for lifting heavy weights,” but wanted to have the injury evaluated by a doctor.

The doctor revealed to Hoy that he had a tumor in his shoulder, later finding out during follow-up scans that he had terminal Stage 4 cancer with tumors spread throughout his shoulder, pelvis, hip, spine, and rib, according to The Sunday Times.

Although this initial announcement did not include the full diagnosis, Hoy said he learned early in the process that he would not be able to recover and had only years left.

Hoy said that he has written a memoir to detail his experience since being diagnosed, noting that he believes it is “important to show how bad it was.”

“There’s so much positivity that can come out of this from all angles. I’m just really excited that this book hopefully will be able to help people,” Hoy added, per The Sunday Times.

The former Olympian had incredible success during his career as a cyclist, helping Britain collect a silver medal in the team sprint at the 2000 Sydney Olympics at just 24 years old.

Hoy’s dominance in the cycling world only grew in the coming years as he won six gold medals in total during appearances in the 2004 Athens Olympics, the 2008 Beijing Olympics, and the 2012 London Games.

Throughout his career, Hoy entered nearly 60 professional keirin events and took second place just four times, winning every other event he participated in, according to The Olympics.