Arnold Schwarzenegger, 73, is seen riding bikes with his mini-me son Joseph Baena, 23, before the budding bodybuilder flashes his stomach

Arnold Schwarzenegger and his son Joseph Baena were spotted enjoying some quality time in Los Angeles this week.

The 73-year-old former California governor and his 23-year-old were seen keeping themselves in shape with an energetic bike ride.

Joseph, who has followed in his father's footsteps to become a bodybuilder, bared his sculpted abs as he wiped the sweat off his face with the hem of his shirt.

Stepping out: Arnold Schwarzenegger and his mini-me son Joseph Baena were spotted enjoying some quality time in Los Angeles this week

The dynamic duo showed off their musclebound arms in t-shirts as they cycled their way around Santa Monica in the sun.

A couple of months ago Joseph posted a heartwarming selfie of his father helping him with his training at an outdoor gym setting. 

'You have to go all out and absolutely NO cheating when you train with him, so you know I’m going to be hurting tomorrow,' Joseph quipped in the caption.  

Before becoming a movie star and then a politician Arnie was a champion bodybuilder in his native land and was consequently known as the Austrian Oak.

Looking fab: The 73-year-old former California governor and his 23-year-old were spotted keeping themselves in shape with an energetic bike ride

Exercise: Joseph, who has followed in his father's footsteps to become a bodybuilder, bared his sculpted abs as he wiped the sweat off his face with the hem of his shirt

In 1970 at the age of 23 he became the youngest ever winner of the bodybuilding title Mr. Olympia, but he retired from the sport a decade later. 

Arnie legally took steroids as a young bodybuilder and dished about the experience to ABC News decades later while he was Governor Of California.

While he did not endorse steroids for contemporary use he said: 'I have no regrets about it because at that time, it was something new that came on the market, and we went to the doctor and did it under doctors' supervision.'

He explained: 'We were experimenting with it. It was a new thing. So you can't roll the clock back and say: "Now I would change my mind on this."' 

On the move: The dynamic duo showed off their musclebound arms in t-shirts as they cycled their way around Santa Monica in the sun

Arnie and his estranged wife Maria Shriver share four children - Katherine, 31, Christina, 29, Patrick, 27, and Christopher, 23. 

Maria left Arnold a decade ago after it emerged that he had fathered Joseph by the family's housekeeper Mildred Baena.

Although they have been separated since 2011 and he is now dating blonde physical therapist Heather Milligan, 46, the divorce has not been finalized. 

Joseph has now also taken his first acting role, a sci-fi comedy called The Chariot, in another career move that mirrors Arnold's.

'You have to go all out': A couple of months ago Joseph posted a heartwarming selfie of his father helping him with his training at an outdoor gym setting

'I'm following my father's footsteps because I'm doing my own thing,' Joseph told DailyMailTV in a recent exclusive interview.

'I'm pursuing acting because I want to pursue acting. So really the pressure is just from myself,' said the actor-to-be.

His hope is to 'just focus on myself' and 'drown' out comparisons to Arnie, despite the fact the Terminator star is an 'inspiration' to him.

At the beginning of last month Joseph revealed on his Instagram page that his multifaceted work life now also includes being a realtor.

As seen in 1976: Before becoming a movie star and then a politician Arnie was a champion bodybuilder in his native land and was consequently known as the Austrian Oak