No trainer has made a bigger impact on the appearance and physical performance of Hollywood’s elite than Gunnar Peterson.

Behind almost every Hollywood hardbody is a great trainer,” read one US Weekly article, “and it’s usually Gunnar Peterson."

Indeed, Gunnar’s client list reads like a who’s who of movie stars and championship athletes.

  • Sylvester Stallone
  • Jennifer Lopez
  • Hugh Jackman
  • Kate Beckinsale
  • Bruce Willis
  • The Kardashians/Jenners (Kim, Kris, Khloe, Kendall)
  • Matthew McConaughey
  • Charlize Theron
  • Tom Brady
  • Mike Tyson
  • Pete Sampras
  • Lindsey Vonn
  • Kevin Love
  • Carmelo Anthony

The list is as diverse as it is impressive. Some trainers work with actors, some with athletes, and others with busy professionals (doctors, lawyers, stressed-out parents). Gunnar works with all of them. The proof of this came in 2017. After a decades-long career training Hollywood’s finest one-on-one, all the while working with elite-level athletes, Gunnar was named the Director of Strength and Endurance for the NBA’s Los Angeles Lakers – an unprecedented career transition.

Nobody does that. Nobody goes from Hollywood trainer to head strength and conditioning coach for one of the most iconic sports teams on the planet. Nobody has the chops, the experience, the credibility to land both gigs.

Nobody, that is, except Gunnar Peterson.

Hollywood and sports are two different worlds: performing on screen versus performing on the field, looking the part and playing a role versus playing a high-impact sport. The ability to train both actors and athletes at the elite level is rare.

Gunnar’s stint in the NBA was brief but successful – his 2020 NBA Championship ring proves the latter. Now, after a cross-country move, he’s back training performing artists in his spacious and loaded Nashville facility.

Gunnar will serve as an ambassador and Master Trainer role at JYM Supplement Science, with his own branded product line in the works, starting with an advanced micronutrient “greens” product formulated by Dr. Jim Stoppani. A partnership with JYM was a natural fit.

I’ve always respected Jim because he not only knows the science, but he also does it himself in the lab – aka, the gym,” Gunnar says. He’s a boss. He’s the epitome of ‘walk the walk.

Until the greens product is launched, check out Gunnar on social media, where his Instagram page "@gunnarfitness" regularly features his famous clients and fully decked-out Nashville gym. He’ll also be creating content (educational videos, posts, blogs) centered around his unique style of functional training for JYM Supplement Science.

The Gunnar Special Stack