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My body is strong, so is my will

Founder & President

Our degreed, experienced and passionate personal trainers will get you in the best shape of your life. We are committed to helping you achieve your health, fitness and nutritional goals.

JULIA KARLSTAD, M.ED., CSCS - Founder & President at JKFITNESS

individualized semi-private personal training and Nutrition Services in San Antonio, TX

Discover a new fitness level with JKFITNESS, your premier personal trainer in San Antonio, TX

Our dedicated team of professionals will guide you on your individualized fitness journey and offer tailored programs to meet your needs.

Our fitness studio is different from anywhere else. 

We specialize in creating a complete wellness program that will work for you and your lifestyle. We get results that last!

Custom Personal Training Solutions

Whether you’re interested in strength training to improve your body composition, endurance training to increase stamina, fitness nutrition for weight loss or functional training to improve overall fitness, you can count on our team to create a personalized fitness program that helps you achieve your fitness goals.

We also have the ability to test your metabolism and Vo2Max.

Yoga and Mobility Training

Enhance your well-being with our yoga and mobility training. Our experienced instructors will lead you through invigorating yoga poses and teach focused breathing techniques to strengthen your body and calm your mind.

Cryotherapy Services

Experience the rejuvenating benefits of localized cryotherapy services. Our state-of-the-art treatments help accelerate recovery, reduce inflammation, and enhance overall performance without going into a full cryotherapy chamber. 

We directly target the affected area. We also do facial cryo rejuvenation; rebuild the collogen in your face and neck to offer anti-aging and skin beatification to your face and neck. 

We are proud to use the °CRYO Penguin cryotherapy machine to deliver the safest and the most effective localized cryotherapy treatments in the industry.

Functional Nutrition Services

At JKFITNESS, we understand the importance of nutrition in achieving your fitness goals. Our expert nutrition coach and dietitian offer personalized guidance to optimize dietary choices.

Trust our experienced team to deliver comprehensive solutions for your fitness, wellness, cryotherapy and nutrition needs in San Antonio, TX. Call JKFITNESS for more information!

Crush your goals

Our knowledgeable and professional personal trainers are dedicated to pushing you to and through your fitness goals.

Feed your health

Our knowledgeable and professional personal trainers are dedicated to helping you meet and surpass your fitness goals.

Proven Results

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Rock solid wall

The JKFITNESS Rock Solid Club was created to recognize and celebrate significant health and fitness accomplishments of JKFITNESS clients! In order to be inducted into the club, you have to be nominated by one of the JKFITNESS staff and then selected with a unanimous agreement from all staff.