The father and son duo were spotted emerging from the SoulCycle studio in Brentwood, Los Angeles where they had taken part in an indoor cycling class.
The 45-minute session is described as giving yourself "a full body workout" with "inspirational coaching and rockstar music," and it seems to have done the trick.
An exhausted-looking Brooklyn was pictured running his hand through his damp hair as he left the studio. Sporting black shorts and a navy T-shirt, the 15-year-old had certainly worked up a sweat as he clutched his half-empty water bottle in one hand.
Following closely behind was David, who looked cool as ever in white tracksuits and a clingy grey T-shirt that showed off his broad shoulders and fully tattooed arms. The former England captain, 38, completed his gym attire with bright orange trainers and a backwards green netted cap.
David and his fashion designer wife Victoria were spotted attending the same cycling class on the weekend.
The whole Beckham clan are enjoying the children's Easter holiday stateside, in the city they used to call home while David played for La Galaxy. The family moved back to their native London last year after the athlete retired from his footballing career in May.
The former Paris Saint Germain player ended his career on a high, playing his final match in the French capital to the cheers of fans. As the game ended, David shed a tear and his teammates later celebrated by throwing their captain up in the air.
David's children are already following in their father's footsteps, as both Brooklyn and younger brother Romeo, 11, have been spotted training with different football academies.
David playing for Manchester United Youth in 1993
David and Victoria's eldest son Brooklyn took part in a practice session with Manchester United — the team where David began his hugely successful career as a midfielder last year. An onlooker revealed that Brooklyn played on the right wing and "impressed spectators" with his display.
The rising star, who is said to be an Arsenal fan, played for LA Galaxy's youth team while his famous dad was based at the club. Brooklyn also had a trial with Chelsea before going on to sign for Queens Park Ranger's youth system last May, while Romeo was signed by Arsenal for their youth academy.
David , meanwhile, has tried his hand at a non-football venture and has just announced the launch of Haig Club — a new single grain Scotch whisky — in partnership with Diageo. The whisky will launch later this year.