Intro to Game Time Strength

Learn more about Game Time Strength (GTS), a Southern California based strength training system. Our unique team training model blends the best of personal training, individualized programming, and group training. Open coaching hours and access to your program allows you the flexibility to train 1-7 days a week for whatever amount of time you have.

Optimizing Movement. Living Lean. Lifting Strong.

Game Time Strength (GTS) and Conditioning is an El Segundo (Los Angeles) based coaching system providing a comprehensive training & nutrition system for those who want to move well, live lean and get strong. While our home base is in Southern California, we provide online training and nutrition coaching to clients throughout the United States. 


Getting Lean

Fat Loss & Body Transformation

Start where you are. We offer training and nutrition programs designed to lose body fat, move well, get strong, and build lean muscle. 

Strength for Life

General Strength & Fitness

"Game Time" can be on the field, or spending time with your family. Become strong, move well, and be ready for whatever life throws at you. 

Strength for Sport

Sport & Endurance Athletes | Powerlifters

Strength & Conditioning programs designed to get you strong, minimize injury, and maximize your time on the field or competition floor. 

About GTS


Game Time Strength (GTS) and Conditioning is an El Segundo (Los Angeles) based strength gym and coaching center providing a comprehensive training & nutrition system for those who want to move well, live lean and get strong.

Beginner Fitness & Weight Management Programs

  • General Fitness and Fat Loss
  • Personal Training
  • Introduction to Barbell Training
  • Nutrition and Weight Management
  • Body Transformation

Intermediate & Advanced Level StrengtH Programs

  • Strength Coaching (Group Training) - Open Gym
  • Athlete Strength & Conditioning
  • Intermediate and Advanced Powerlifting 
  • Powerlifting Form and Technique Checks
  • Powerlifting for Crossfit
  • Strength and Powerlifting Club
  • Power Building (Powerlifting and Body Building)
  • Program Design and Consulting
  • Online Program Design


Our mission is to educate, empower and provide a system of accountability and structure for those looking to improve their movement, health, fitness, strength and body composition. 

Who are you?

Our system is designed for those of you surviving in the trenches of modern day society, limited in time, locked in a chair, bogged down by a growing list of responsibilities and looking for a mechanism to get strong and make healthy changes to improve your quality of their life.

Our Approach

We focus on reclaiming OPTIMAL movement patterns first, then safely strengthening those movement patterns through big compound lifts (such as the squat, bench, deadlift, overhead press, etc).

At GTS you will…

  • Optimize fundamental movement patterns lost over the years due to sitting, poor mechanics, shoes, and dysfunctional repetitive motion. 
  • Train your body to engage in an activity/task as a unit, instead of a series of individual body parts.  
  • Train for a specific goal over time, instead of arbitrarily working out.  Your goals will evolve and change over time.
  • Gain an understanding of your bio-mechanical weaknesses and eventually turn them into strengths. 
  • Re-learn and implement nutritional protocols designed to maintain a strong, lean, healthy body and mind.  
  • Become part of a team and surround yourself with a group of like-minded individuals all trying to improve themselves both mentally and physically. 
  • Be selected to showcase your newly acquired strength in local, national or world competitions.  
  • Have full access to coaches that live and breathe their work, constantly studying and collaborating with some of the brightest minds in the industry.

Learn how to safely use barbells, kettlebells, and free weights and feel comfortable in any gym setting. 


Our mission is to educate, empower and provide a system of accountability and structure for those looking to improve their movement, health, fitness, strength and body composition.   

We focus on reclaiming OPTIMAL movement patterns first, then safely strengthening those movement patterns through compound lifts such as the squat, bench, deadlift, overhead press, etc.

Your GTS Coaching staff will hold your hand every step of the way as you learn how to perform exercises and movements with proper form, read and understand your program, and gain the confidence to load and set up your weights. You have one body. Our goal is to make your health, strength, & fitness a priority in your life and to ensure you feel comfortable performing your program in any gym setting! 



The best of personal and group training!


Enjoy the individualized program design of personal training in a "team training" environment.  No longer are you restricted by time or class based programming.  GTS offers open coaching hours to work on your customized program, or have the freedom of training on your own time!   

Take advantage of your coaching staff for program changes, technique work, spotting, and nutrition questions.  Use your teammates for an extra set of eyes, accountability and motivation! 



Customized Program Design.


While we work in a team environment, each athlete is on their own unique program.  Your coaching staff will provide you with exact numbers and objectives for each training session. Work with your coach to make modifications on the fly.  Training sessions can be short and frequent, or longer and spaced out. Gain the flexibility to schedule your workouts around your life, not the other way around! 

Traveling? No problem.  Take video or pictures of what you have access to and your coaching staff will send you workouts to stay on track.


GTS Health Coaching and Accountability Program.


Build healthy habits one step at a time.  Whether your goal is to lose fat or build muscle, nutrition is paramount.  

Have a lot of weight to lose? Meal preparation a chore? 

Try our Health Coaching Program where we take the guess workout out of what and when to eat.  Lose excess body weight fast using a safe and reputable system.  Our commitment isn’t just to weight loss, but to Optimal Health - sustaining a life of thriving health that can improve everyday living. We’re here for the long haul, committed to a comprehensive approach to lifetime health. Our system is designed to change unhealthy habits into healthy ones. We all know habits are difficult to change, which is why personal support through Health Coaches is so effective in sustaining long-term health. You and your coach will be in communication daily over text or email to ensure you're on track and working toward a healthier life.

Comfortable prepping and tracking your food?

Have your coach provide you with customized calorie, protein, carb and fat goals to hit each day as you work toward your goal. 



Game Time Strength is home to many novice to elite level powerlifters.  As you learn how to safely execute the Squat, Bench and Deadlift and build up your strength and confidence, you have the option of testing your maxes in a competition setting.  Your coaching staff will be there every step of the way and make sure you are prepared for everything.  

Competing is not just for the elite!  We encourage everyone to see what they are made of.  It helps in establishing objective strength and body weight goals, holds you accountable, and gives you a forum to legitimize your training.

GTS holds safe, friendly in-house competitions for members to test their maxes, and has competition teams that compete in federations such as USAPL and USPA.  

GTS Coaching Hours

M | W | F : 6-9am

M | T | W | Th | F : 330-730pm

Sat : 730 - 10am


4 Star Gym

436 Main St. El Segundo, CA

4 Star Gym (Four Star Gym) is the home of Game Time Strength and the leading Strength & Powerlifting Training Gym in the South Bay. Located on 436 Main St, El Segundo the gym has been in business since 1969! Learn more about the history of 4 Star Gym here.

4 Star Gym is a 24 Hour Access Key Club Strength Gym, with a 40+ year history. It has everything you need to begin a strength program and/or take your training to the next level. It is home to 100's of lifters and competitive strength athletes.

If you train on your own, it is a great place to implement any program from Mark Rippetoe's Starting Strength, Dan John, Jim Wendler's 5-3-1, Louie Simon's Conjugate Method from West Side, StrongFirst, RKC, Pavel's Power to the People, etc.


Coaching Staff

Jason Kelske
Head Strength Coach, Owner

NSCA, Certified Strength & Conditioning Specialist (CSCS)
Open Heart Surgery Survivor
USPA Certified Powerlifting Coach
Competitive USPA/IPL & USAPL Powerlifter
CPR/AED Certified, FMS Certified, TRX Instructor

Jason is a Certified Strength and Conditioning Specialist (CSCS) with the National Strength and Conditioning Association (NSCA),  life long scholar of human movement and performance, as well as a former collegiate athlete & D1 Men’s Club Lacrosse Coach. In 2009 he earned a spot in the Top 20 (220lb) Powerlifters and set a new WPF World Record in the Deadlift.  Currently, he has competed as a drug free powerlifter in the 198, 220 & 242 lb weight classes and is listed on the All Time Ranks.

In 2014, after a routine physical, Jason was diagnosed with a severe congenital heart condition which required immediate attention.  On January 29th 2015, he underwent a 4 hour open heart surgery procedure to repair his bicuspid aortic valve. The surgery was a humbling, yet amazing experience.  During the forced time off Jason continued to hone his coaching, technique and programming skills. It gave him the ability to relate to many of his novice clients as he re-experienced what it was like to start from scratch at 35 years old. He has since made a full recovery and stronger than ever!   

In addition to his accomplishments on the field and as a strength athlete, Jason has also competed as an endurance athlete, and has the training and nutritional knowledge that has allowed him to successfully (& naturally) both gain and lose over 40 lbs in last few years! Although the pursuit of strength and speed has always been a passion of his, Jason doesn’t subscribe to a single training philosophy.  He has studied and implements a variety of training modalities and techniques designed to improve all aspects of human performance while striving to prevent the risk of injury in the gym and on the field. Workouts are fun, full of energy and offer innovative exercise techniques guaranteed to get you looking, feeling and performing your best.

Dennis Kerr
Assistant Strength Coach

USPA Certified Powerlifting Coach
Competitive USPA/IPL Powerlifter

When you think of the typical strength, health and fitness professional you most likely don’t think of someone that used to be morbidly obese that eventually turned their life around, but in Dennis’ case that’s exactly what you get.

Weighing in at 165 pounds in high school, he watched his weight slowly creep up once his days of playing football, baseball and judo ended. The poor eating habits he had gotten away with in his active youth now began to slowly take their toll on his sedentary body. His weight eventually topped out at 288 pounds, he had a list of prescription medications he took, and he suffered from physical ailments that grew at an alarming rate.

Of course all along the way to becoming morbidly obese he tried every fad diet that came along, but as is almost always the case with such diets he ultimately failed to either lose weight or maintain whatever meager weight loss he was able to temporarily achieve. Then, thanks to Game Time Strength, he discovered something old, something that has stood the test of time, resistance training and macro nutrient manipulation, and lo and behold he started to see the results that had eluded him for so long.

Before joining the coaching staff at GTS, Dennis spent over 25 years honing his skills as an educator and trainer, helping both individuals and organizations improve their performance and achieve their goals, and it’s this experience combined with GTS’ proven training and nutrition programs, as well as his own success at overcoming obesity that make him such a passionate and effective trainer and coach.

Today Dennis is in the best physical shape of his life. He not only no longer takes any medications or suffers from any physical ailments, but he holds the USPA California state record in the deadlift for his age and weight, and has been ranked in the top 30 nationally in two different weight classes according to When he’s not helping others achieve their strength and weight loss goals, you’ll most likely find him off on some adventure doing things that his once obese self could only dream about.

Jason Kahn
Assistant Strength Coach

BA Kinesiology/PE from San Francisco State University
NSCA CSCS & CPT, CPR/AED certified
Training in various martial arts

At the age of 16, Jason was introduced to the world of strength training and fitness by former Mr. Universe Dave Draper. Dave was Jason’s first teacher, mentor and inspiration in strength training. Jason played football and ran track in high school and walked on to the football team as a freshman in college.Always returning to what he loved most: weight lifting for strength, health, function, improving his physique and for the sheer joy of it, Jason decided to pursue a major in Kinesiology.

After graduating in 1994, he immediately started a career as a personal trainer that has been successfully un-interrupted since. He has successfully trained people from all walks of life with a myriad of goals.

Over the course of 30 years, Jason has trained in a variety of different martial arts styles including: Ed Parker Kenpo, Choy Li Fut kung fu, Tai-chi, Fairtex Muay thai, Haganah F.I.G.H.T. system, and Lions Den Dallas.

Along side his personal training career, Jason has also served as an Executive Protection Specialist for the Chairman/CEO of two major corporations.

Jason’s passions include: Pit bulls (his favorite breed of dog-but he loves them all!!!), strength training, hiking, rock climbing, surfing (just starting out), and traveling with his wife.

Team Captains

At GTS we have several Veteran Athletes, you can trust with questions, technique and form.  

Coming Soon...


It's time to make a change! How can we help you?

Phone : 310.363.2371

Email :

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