Charles Gaines, the writer and outdoorsman known for his pivotal role in popularizing bodybuilding and inventing paintball, has died at the age of 84. Gaines, best known for his 1974 book *Pumping Iron*, offered a groundbreaking examination of the competitive bodybuilding scene in the United States and helped bring the sport into the mainstream.

Born Charles Latham Gaines III on January 6, 1942, in Jacksonville, Florida, Gaines later moved with his family to Birmingham, Alabama. After briefly attending Washington and Lee University in Virginia, he traveled across the U.S. and eventually pursued an MFA in writing at the University of Iowa. He later taught creative writing at New England College in New Hampshire. Gaines’s early interest in bodybuilding developed casually but grew into a serious pursuit that informed much of his work.

His novel *Stay Hungry* (1972), set in the bodybuilding world, was praised for its insightful and often humorous depiction of the sport’s subculture. The novel was adapted into a feature film in 1976, marking Arnold Schwarzenegger’s first major acting role. Schwarzenegger’s collaboration with Gaines would prove significant, as the pair worked together on *Pumping Iron*, a detailed and vivid look at bodybuilding culture, accompanied by photographs from George Butler. The book challenged dismissive stereotypes of bodybuilders and showcased the dedication and artistry involved in the sport.

The ensuing 1977 documentary film *Pumping Iron*, co-written and narrated by Gaines, further propelled Schwarzenegger to international fame, setting the stage for his future career in Hollywood and politics. The film notably spotlighted the rivalry between Schwarzenegger and Lou Ferrigno, who later became famous as The Incredible Hulk.

Beyond bodybuilding, Gaines made a lasting impact as a co-founder of the sport of paintball in 1981. Originating from a friendly competition with Woodsman Hayes Noel using forestry-marking pistols, paintball evolved into a popular international activity. Gaines described the appeal of paintball as tapping into an innate human desire for competition and survival in a symbolic form.

Throughout his career, Gaines also wrote various novels, screenplays, and works related to outdoor activities such as fishing, mountaineering, and bird hunting. He produced films for the ABC series *The American Sportsman* and published memoirs including *A Family Place* (1994), which recounted his efforts to reconnect with his family.

In his later years, Gaines expressed mixed feelings about developments in bodybuilding, especially concerning the use of performance-enhancing substances in the sport’s female divisions.

Charles Gaines passed away on July 21, 2026, and is survived by his wife and three children. His contributions to literature, sport, and recreation have left a lasting legacy that continues to influence bodybuilding and leisure activities worldwide.