Arnold Schwarzenegger’s son opened up about how his previous less-than-healthy lifestyle motivated him to get fit.

Joseph Baena, 27, whom the action star, 77, shares with former family housekeeper Mildred Baena, reflected on the challenges he faced in getting in shape in a new Instagram video.

‘People sometimes forget that I used to be chubby in high school,’ the bodybuilder wrote.

He produced a humorous video in which he considers skipping his workout only to be reminded of his former form.

‘I got cut from my basketball and soccer team because I couldn’t keep up with the other kids,’ Baena explained of the painful rejection he received when trying out for sports.

‘Swim didn’t have tryouts thankfully and completely changed my life forever,’ he said of his experience at Riverside High School, some two hours away from his biological father’s home in Los Angeles.

Arnold Schwarzenegger’s son, Joseph Baena, 27, has opened up about how exercise helped him transform his body in high school thanks to swimming

Baena added that swimming ‘was my introduction to Fitness and training. Everyone starts somewhere but starting is the most important.’ 

Many of the young actor’s followers identified with his struggle. 

‘Bro that was me in childhood too!!,’ wrote one sympathizer.

‘I still remember waiting at the amphitheater for my sister and you coming up to me asking if I was gonna swim that year but I was already doing theater,’ a former classmate shared. 

‘That’s so great to hear! My daughter is on the swim team at her high school and she has really muscled up!! It’s a great sport!!’

Another fan paid him the ultimate compliment by comparing him to the role that helped turn his dad Schwarzenegger into a big screen action star.    

‘Our new Conan!!! I mean that with all respect because dude you are it!!!!,’ they wrote. 

‘Happy you tapped into some of the best genetics on the (planet)’ stated another.

Baena is the 77-year-old action hero’s son from his relationship with family employee Mildred Baena

Baena produced a humorous video to explain why he doesn’t skip his workout even when he may want to

 ‘People sometimes forget that I used to be chubby in high school,’ he said. ‘I got cut from my basketball and soccer team because I couldn’t keep up with the other kids’

Many followers admitted they could relate to his struggle. ‘Bro that was me in childhood too!!,’ wrote one sympathizer

One complimented Baena on his transformation, comparing him to one of his dad’s most famous characters. ‘Our new Conan!!! I mean that with all respect because dude you are it!!!!,’ they wrote

Baena has two jobs, working an a realtor in Southern California while also focusing on acting. 

He has been keeping busy in front of the camera. 

The up-and-coming star has a part in the upcoming holiday film, Dog Patrol, starring Cuba Gooding Jr, which will be release on September 20. 

He has also completed work on the romantic comedy American Spark written and directed by Michael Baumgarten.