Richard Crouse

There’s stubborn, and then there’s Diana Nyad, the subject of “NYAD,” a new Netflix movie starring Annette Bening as a marathon swimmer who doesn’t know the meaning of the word quit. Battling against age, weather and expectations, she refuses to give up on her dream of swimming the 108 miles (174 km) from Cuba to Key West through shark and jellyfish infested waters. “I will not accept defeat,” she says.

Based on Nyad’s true story, the movie begins on the eve of her 60^th birthday. Thirty years after trading her swimming career for a gig as a correspondent for “Wide World of Sports,” she wants another challenge. “You turn sixty and the world decides you’re a bag of bones,” she says.

Sidestepping the self-described “hurtling toward mediocrity,” she sets her sights on revisiting her failed 1978 long distance swim between Cuba to Key West. At age 29 she swam for 42 hours, covered 76 miles (122 km), but was forced to abort because of weather.

At the time experts said the swim was “closer to impossible than possible.” Now, with a ragtag team of volunteers, including her best friend/coach/support system Bonnie (Jodie Foster) and navigator John Bartlett (Rhys Ifans), she sets off to conquer the “Mount Everest” of swims, no matter how many tries it takes. “I don’t leave room for imaging defeat,” she declares.

“NYAD” is not exactly a biopic. It focusses on a specific time in Nyad’s life, filling in background details with hallucinatory flashbacks, so it never goes deep. Instead, it succeeds because it is a portrait of the determination required to become a world class athlete and the team that helps along the way.

It’s also the story of platonic love as it examines the friendship between Nyad and Bonnie. Bening and Foster, both terrific, provide the movie’s heart, providing an emotional element that elevates the film’s prevailing, and occasionally overwrought, inspirational message. The third spoke on the wheel is Ifans as the gruff-navigator-with-a-heart-of-gold. His analytical, logical approach provides a nice counterpart to Bonnie’s tough love and Diana’s self-absorption.

The swimming scenes, and there are many of them, are nicely captured by “Top Gun: Maverick” cinematographer Claudio Miranda, whose camera gives the audience a you-are-there look at Diana in action. The vastness of the ocean, the ever-present danger of sharks and venomous Box Jellyfish coupled with Miranda’s photography amplify the overwhelming odds Nyad is up against.

“NYAD” spends much of its runtime in the water, following Diana as she makes attempt after attempt to achieve her goal, but it isn’t the sport that makes the movie interesting. Like any great sports movie, it’s the people, not the game that is most compelling.