Jason Momoa shared the rock climbing workout he swears by to get in shape for 'Aquaman 2'

• Actor Jason Momoa recently shared a trip to Canada's largest indoor rock climbing gym on his YouTube channel.
• He said he was getting back in shape in time to film "Aquaman 2."

Actor Jason Momoa took fans on a shirtless tour of a Canadian rock climbing facility in an October 10 YouTube post, sharing his love for the sport before heading off to film "Aquaman 2."

He said he was trying to get "back in shape" during his day at the gym.

"I haven't been training as much as I should because it's COVID and it's hard. We're working out in the back yard," he said.

Walking the camera through Canada's largest indoor climbing gym, Momoa is literally hopping with enthusiasm to be there, showing off the 50-foot tall facility in Mississauga, Ontario, north of Toronto.

"It's pretty bad when you're running around the gym so excited," he said. "I have a special place in my heart for climbing gyms."

Momoa has been a longtime fan of rock climbing, despite having tendinitis, as he notes in the video, which can cause pain, swelling, and stiffness in the tendons.

While at the gym, an assistant uses a knife-life scraper tool to help massage and loosen up Momoa's arms so he can continue climbing.

At one point, Momoa takes a breather, courtesy of too many recent leg days, he said, and uses a massage gun to help relieve the ache.

"I can feel it. I'm not in climbing shape," he said.

Momoa is also shown in the video teaching his cousin how to climb, which he said is in exchange for surfing lessons.

"There's just so many things that I've learned from climbing that this is awesome, it's such a beautiful thing to be able to share," Momoa said.