Sam Heughan showed off jacked biceps in post-workout selfie

Outlander season 6 might have finished filming, but star Sam Heughan is keeping busy and looking to stay in top shape during the off-season!

While most people might look to enjoy some rest and relaxation between work, Heughan is staying busy and keeping in shape by maintaining his intense fitness routine. It’s all part of his My Peak Challenge initiative, a community that is all about inspiring individuals to live healthier, happier and more balanced lives all while also helping to raise money for charities in the process.

Clearly, his fitness regime is working as Heughan is looking incredible as he proudly showcased in his newest Instagram selfie.

Sam Heughan shares jacked selfie

Outlander star Sam Heughan proudly showed off his summer body in flexing for the camera after enjoying an intense workout, while rocking a baby blue tank that fans were quick to comment complimented his own baby blues.

“Intense week and sweaty Saturday session to finish it off,” Heughan captioned the photo which seems to have been snapped after getting in a good outside workout. As Heughan’s selfie proves, his workout plan is clearly paying off and it’s definitely an intense routine.

While Heughan didn’t specify his exact workout regime in this particular post, Heughan is known for pushing himself with intense workout plans!

On his birthday, Heughan revealed his birthday workout regime included 4,100-meter SkiErg, 41 pullups, 41 squats, 41 bench press, 41 box jumps, 41 kettlebell swings, 41 double under, 41 burpee deadlifts and 41 prowlers. Another recent workout entailed a 1-mile run, 100 pull-ups, 200 push-ups, 300 squats, followed by another 1-mile run — all completed with a 20-pound weight vest!

Sam Heughan’s Outlander costar trolls his latest post-workout selfie

Heughan’s post-workout selfie didn’t just catch the eyes of his millions of followers, as his Outlander co-stars quickly took notice of the selfie… and had some fun at his expense with some good-humored trolling.

“I really wish you’d stop superimposing your head on my body without asking. I’ve put a lot of work in,” joked Tim Downie, who plays Governor Tryon on Outlander.

“You ever thought about having a bicep transplant? So you actually have one,” playfully asked fellow co-star Steven Cree, better known as Ian Murray to the Outlander fandom.

The jokes were, of course, all made in good fun and we’d expect nothing less from our favorite tight-knit fandom!

Watch Outlander Seasons 1 to 5 on STARZ right now. Stay tuned for the Outlander Season 6 premiere date.