Personal Training • Functional Strength Training

Strength, built around your life

Tailored for every fitness level: beginners, older adults, and athletes. Train in-person at 3 convenient San Diego locations: Ocean Beach, Bay Park, and La Mesa- or smash your goals from anywhere with our flexible remote and hybrid programs. Duo, small group, and in-home sessions also available.

Personal trainer coaching a woman the deadlift during a personal training session in Ocean Beach, San Diego.
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In-person, remote, or hybrid, — your call.

  • In-person (3 Locations in San Diego)

    Bay Park: 1205 W Morena Blvd, San Diego, CA 92110 (Werk Fitness)
    La Mesa: 8380 Center Dr C, La Mesa, CA 91942 (Werk Fitness)
    Ocean Beach: 1811 Sunset Cliffs Blvd, San Diego, CA 92107 (BUILD Private Access Gym)

  • Remote

    Custom programming built for your equipment, delivered to your phone. Constant line of communication for review and accountability.

  • Best of both

    Meet in person when it counts, train on your own with a plan the rest of the week. Nutrition tips included.

  • Beginners to lifting weights
  • Older adults with pre-existing conditions
  • Working professionals
  • Athletes looking to prevent injury and improve performance

Who it’s for

  • Strength & resistance training
  • Conditioning & core work
  • Mobility, balance, power & plyometrics
  • Nutrition tips &  guidelines

What you’ll learn

  • A healthier more resilient body and mind

  • Feeling good - physically and mentally

  • Confidence with any equipment
  • Performance for the life you love

The outcome

ABOUT YOUR COACH

San Diego personal trainer Jeff Jun coaching strength and fitness in Bay Park, Ocean Beach, and La Mesa
San Diego personal trainer Jeff Jun coaching strength and fitness in Bay Park, Ocean Beach, and La Mesa

Movement shouldn't feel like a chore; it should be a celebration of what your body is capable of.

Hi, I’m Jeff! When I started my fitness journey, I realized that physical health is the ultimate anchor for mental peace. True fitness is about building functional strength for a better quality of life, not just how much weight you can lift. I wanted to help others experience that same shift, which inspired me to become a certified personal trainer and strength & conditioning coach. Fast forward 8 years, and I’ve had the honor of guiding more than 180 clients toward feeling strong in their own skin.

My goal is to make a gym a welcoming, stress-free space. Instead of extreme routines, we focus on moving without pain, strengthening your foundation, and building a body you can rely on for decades. Outside the gym, I keep my own balance by hiking, lifting, and enjoying the San Diego sun. If you’re ready to build strength to support the life you love, I’m ready to be in your corner.

Our Locations

  • San Diego personal training facility in Bay Park equipped with free weights and machines for Grateful Strength & Wellness

    Bay Park - Werk Fitness

  • Motivating personal training space in La Mesa featuring 'ROW' and 'STRONG' wall graphics alongside extensive gym equipment.

    La Mesa - Werk Fitness

  • San Diego personal training facility in Ocean Beach equipped with functional fitness and strength equipment for Grateful Strength & Wellness

    Ocean Beach - BUILD Private Access Gym

Contact us.

Call/Text: (619) 800-8389

Email: trainwithjun@gmail.com

Training Out Of:

  • Werk Fitness Personal Training - San Diego, 1205 W Morena Blvd, San Diego, CA 92110

  • Werk Fitness Personal Training - La Mesa, 8380 Center Dr C, La Mesa, CA 91942

  • Build Private Access Gym, 1811 Sunset Cliffs Blvd, San Diego, CA 92107

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