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Katherine Coltrin

Newport Beach, CA 92663

I founded Smart Bodies in 1991 as an independent company that provides clients with comprehensive health and fitness programming. A certified and credentialed trainer, my primary goal is to match your activity (office worker, general daily life activities, specific sport) to your bodies needs. I furnish specific conditioning programming to prevent injury, improve posture and performance, and increase weight loss. My specialties iclude: women over forty, athletic performance and injury prevention, corrective exercise and the mature adult.

The client’s education begins with what a good trainer knows and practices. I have an extensive background in many areas of health and fitness as listed in my profile. However, I believe the two most important components of a successful, life long wellness plan are CONSISTENCY and keeping it FUN. I am dedicated to providing my clients with fitness programming that incorporates the latest research and best practice methods while keeping it fun.
In 2009, to encourage my clients and others
'To Get Active', I sold my car. Currently I commute via bike, foot, or public transportation. For two years, I commuted from Pasadena to Orange County via, train, bus and bike weekly. A great experience and still love it!!!

In order to remain competitive and to improve my own physical preparedness, I utilize a personal trainer as well. What I do in the gym prepares me for the rigors and demands of competition, work, and commuting in the elements. Conditioning and strength training are the minimal prerequisites of successful performance and continued health. In addition to being a personal trainer, I run, swim, rock climb, kayak, and mountain bike in national athletic competitions.

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Verified Cert/Training
MindBody Professional
IDEA Member

About Me


  • BSc., Applied Exercise Physiology, UC Berkeley
  • Master's Degree, Exercise Physiolgy/Kinesiology, CSULB

Years Experience


Certifications / Trainings

NSCA - Certified Strength and Conditioning Specialist
FMS - FMS Certification
GI - Fellow of Applied Functional Science (FAFS)

CPR Certified

AED Certified

Katherine's Locations

Restore RPI

351 Hospital Road
Newport Beach, CA 92663

Within 10.00 miles of 92627 (Mobile Training Radius)

Additional Information


$100.00 / hr

Payment Methods

Cash, Credit Cards, Personal Checks

Book Online

Awards & Accomplishments

  • IDEA Health and Fitness Association: Exercise and the Heat: What you need to Know
  • American Stroke Association Orange County: Flexibility Training for Running
  • U.S. Masters Swimming: Strength Training & Injury Prevention
  • Bicycling Club of Irvine: CA-Strength Training for Cycling
  • National Council on Teacher Retirement: Exercise and Aging
  • Santa Ana Community College Fire Academy: Strength Training for Fire Fighters
  • Conquer Adventurers Training School: Adventure Racing Nutrition
  • Nature Conservancy, Irvine Company, Irvine: Beat the Heat: Hydration and Nutritional Practices
  • American College Sports Medicine: Personal Trainer 3-day Certification Workshop
  • Back Bay Fitness Trainers: Improving Personal Training Business Practices
  • CSULB: Securing the Client
  • PROFESSOR: CSULB- FItness for Living
  • ARTICLES: “Renovating the Status of the Personal Trainer,” Club Industry, November, 2003
  • “Beat the Heat: Understanding Heat Illnesses”, IDEA Personal Training Summit, 2005
  • Big Blue 24 hour Adventure Race Solo 1st Female
  • Mt Diablo 50-Mile Endurance Run 1st Place Overall
  • Holcombe Valley 33-Mile Trail Run 1st Place Female
  • Cal Eco Adventure Race 2nd Place Team
  • 12 Hour Summit Mountain Bike Race 1st Place Female
  • Lost Boys 50-Mile Ultra Trail Run 1st Place Female
  • New Zealand Ironman 8th Place Female
  • Bull Dog 50K Ultra Trail Run 2nd Place Female
  • Catalina Adventure Race 3rd Place Team
  • Walkabout 40-hour Adventure Race 2nd Place Team
  • Navy Seal Fitness Challenge 1st Place Female
  • IDEA Health and Fitness Association: Aging and Balance Training: What Does the Research Say?
  • IDEA Health and Fitness Association: Aging and Balance Training: What Does the Research Say?

Languages Spoken




7 Reviews

5.0 out of 5 Stars

  • by John McSunas on Mar 04, 2016

    by Jack McSunas March 3, 2016

    I have known and worked with Katherine on and off over about 12 years and three locations. She is an outstanding trainer and really caring human being. She has special skills in working with the elderly and gets better results than any other trainers with whom I have had any experience. She is especially effective in bridging the gap following physical therapy. She works with the client to get the best results possible. She recognizes how far to go with her clients.

  • by John Marshall on Aug 21, 2012

    It is difficult to express in such space the profound contributions Ms. Coltrin has made in my life. So let me say this. From 220 lbs of stress . . . coaching/training by/with Ms. Coltrin . . . result(s) . . .

    2007 - Ironman Full distance Finisher;

    2006-2007 - San Diego Half Ironman Finisher;

    2004-2005 - Hawaii Half Ironman Finisher;

    2004-2012- 50+ critrium bike races;

    2004-2009 - Long Beach Sprint Triathlon Finisher;

    2007 - Chicago Marathon Finisher;

    2010-2012 -Los Angeles Triathlon Finisher

    2008-2012 - 10k finishes under 45 minutes

    2010-2011 - Hungtington Beach Half Marathon Finisher.

  • by Princetta Brandner on Aug 20, 2012

    I am a new client of Katherine’s as my former trainer moved away. I had seen her in the gym working out with her clients and they always looked like they were having a lot of fun. When I saw one of her clients do the hula-hoop I was mesmerized and had to have her as my trainer. Katherine is great! When you are training with her you are working out but you are also learning at the same time, as well as having her complete attention. She is full of energy with an engaging personality and she makes you feel that your goals are not only important to you, but to her also. I have about 25 lbs to lose and I know that I will finally reach my goal.

  • by Lisa Anderson on Aug 17, 2012

    I hired Katherine to be my personal trainer to help me regain muscle strength and tone and was so impressed with the new levels of energy and endurance I gained. She is extremely knowledgeable in anatomy and body bio-mechanics, and loves to figure out what is the best route to overall health for an individual, as opposed to the generic workouts you often see in trainers.
    I highly recommend her to anyone, novice or experienced, for the journey to fitness.

  • by User on Aug 17, 2012

    I've known katherine for roughly 15 years, as a trainer and a friend. In both capacities she is truly outstanding. For the purposes of this review, her abilities as a trainer are unsurpassed and transcend anything else available. The term "personal trainer" really doesn't do her justice. Whether your objectives are to find someone to help you with getting healthy, getting fit, getting fitter or to prepare for an particular event, Katherine is without peer.

    I was a competitive "team sport" athlete for the first part of my life and in my middle ages I set my sights on endurance athletics, first marathons, than triathlons. Katherine was instrumental in preparing me for my first marathon and triathlons and without her I would have never gone in to compete in multiple events including, without limitation, 10 Ironman triathlons. Now, after a couple of years off, as I prepare to do my my 11th Ironman, the first person -- the ONLY person -- I have turned to for training help is Katherine. No matter what your goal, you'd be wise to do the same.

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