AREAS OF SPECIALTY.

  • ‘The Aging Athlete’ Perspective

    • Build and maintain muscle mass, functional strength, and explosive power safely

    • Protect and restore joint health for long-term performance, with advanced knowledge and experience with shoulder and knee injuries, knee replacements

    • Develop resilience and confidence to navigate the physical and metabolic shifts that come with being an aging athlete

  • Comprehensive Fitness + Health Assessments

    • Fitness: Analysis of flexibility, movement quality, muscle recruitment patterns, core stability, and cardiovascular capacity

    • Health: Review nutrition, sleep, stress, and lifestyle habits to uncover what supports, or sabotages, your progress

    • Advanced Testing (as needed): DEXA body composition scans, VO₂ max testing, and other cutting-edge assessments to fine-tune your plan

  • Highly Individualized Fitness and Lifestyle Programming for Men and Women

    • Mobility and movement training to preserve joint range of motion for everyday function and peak performance

    • Strength and muscle growth programs customized to your body, goals, and training history — intelligently paced to maximize results without overtraining

    • Recovery strategies designed to reduce inflammation, optimize muscle repair, and protect against injury

    • Comprehensive lifestyle coaching to improve body composition and healthspan through integrated fitness, nutrition, stress management, and longevity strategies

Billy’s BIO.

He/Him/His

Billy Polson, BS, CSCS, is a nationally recognized certified personal trainer, performance coach, fitness entrepreneur, international speaker, and the founder/co-owner of DIAKADI personal training gym. As a fitness performance coach, he was named by Men's Journal Magazine as one of the Top 100 Trainers in America, as well as one of the Top 10 Trainers in the Bay Area by the San Francisco Chronicle and Haute Magazine. Peers and other fitness professionals look to Billy as a fitness advisor and business coach for good reason - Billy devotes his own life and energy towards helping others learn how to live the strong, healthy, successful and happy life they were meant to live.

From his undergraduate and post-graduate studies, his national certifications, his 25+ years of experience working as a coach and trainer, and a lifetime spent as a competitive athlete, Billy knows body dynamics, injury rehabilitation and how to maximize personal performance.

Are you ready to move better, feel stronger, and perform at your highest level in life and sport? As an aging athlete in my 50s, I know firsthand the ups and downs of training, competing, rehabbing injuries, and chasing big goals. I’ve torn rotator cuffs, replaced both knees, and felt the joint pain that comes with years of pushing my body hard in athletics and life. But I’ve also discovered the power of smart strength training and cardio conditioning, muscle balance, joint alignment, and mobility work to keep moving forward. Through decades of experience and advanced education, plus countless hours working alongside physical therapy teams, I’ve learned how to turn setbacks into comebacks. I’m passionate about helping clients not only resolve pain and imbalances but also return to their version of peak performance. Beyond the gym, I love studying longevity and healthspan, while fine-tuning and experimenting with my own nutrition, sleep, and recovery habits.

Every client receives a handcrafted, unique fitness and health plan for their exact needs, using the following results-driven framework:

  • Comprehensively assess

  • Set SMART goals (Specific, Measurable, Achievable, Relevant, Time-bound)

  • Develop and follow an individualized fitness and wellness program

  • Reassess for results and challenges

  • Adjust goals, adjust program, repeat

Together we’ll build the strongest, healthiest version of you.

Billy’s Professional Resume:

Since joining the fitness industry in 1998, Billy's vision was to create a cutting-edge training facility exclusively for the Bay Area's leading independent fitness trainers and coaches. DIAKADI is that vision, and has been voted the Best Place to Get Fit by San Francisco Magazine, the Best Program Design by 7x7 magazine, as well as the Top Trainers and/or Gym in San Francisco for over 20 years.  In 2015, with the intention of helping fitness entrepreneurs advance their skills as business owners, Billy co-founded DIAKADI’s Business Movement, which continues to assist hundreds of fitness professionals world wide with building and growing their most successful fitness businesses. In 2020, with the goal of building a support network for all fitness studio owners in San Francisco throughout the COVID pandemic, Billy co-founded the San Francisco Independent Fitness Studio Coalition, which joined together over 80 boutique studio owners in the Bay Area.

EDUCATION.

CLIENTS.

  • U.S. Swim Team Member

  • U.S. Women's Lacrosse Team Member

  • U.S. Women's Rowing Team Member

  • U.S. Team Member of Mr. Olympia Body Building

  • Professional Skate Boarder

  • Junior National Volleyball Player

  • Beginner and Competitive Triathletes

  • Youth (ages 11 -18) of all Experience Levels

  • Obese Individuals Losing from 90-180 lbs

  • Seniors Gaining an Inch in Height Through Posture and Strength Work

TESTIMONIALS.

 
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Billy is super-engaged and it's really amazing working with him. I really appreciate his mind-blowing attention to detail and his ability to think outside the box; that is, when something isn't working he's got a back-up plan (sometimes multiple back-up plans) ready-to-go as a work-around. I've learned so much from Billy in the last nine months...not just about fitness, but also anatomy, teaching, human behavior, relaxation and stress management, and overall wellness. He is a fountain of knowledge and always willing share it and always able to communicate it in language I understand.
— Dave F,
Former collegiate athlete, now proud to keep up with his two kids under 10

 
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Billy has me making the biggest gains and strides towards my personal fitness goals ever. His wide breadth of knowledge and attention to even the smallest detail, have set the bar so high that no one in the past or ( I will be bold enough to say) future can compare. Billy tapped into my mindset as soon as we started the assessment. He is passionate about his work, he instills his enthusiasm in you. You strive to show him you are moving towards your goals.
— Jared M,
Technology genius with a standing desk addiction