Osvaldo Aponte

profilephoto01-0013700000NZVD3AAPOs has over 20 years of successful personal training experience in San Diego, but his physical training and teaching foundation didn’t start here. Having practiced martial arts from the age of 12, Os opened his martial arts school in Puerto Rico at 16, serving over 120 students weekly. He kept the school running for three successful years until he joined the U.S. Army in 1997 and took on the physical training duties for his unit. It was while in the Army that he discovered his penchant for coaching. His emphasis on sustainability and technical proficiency enabled him to motivate and train soldiers to pass the Army Physical Fitness Test, meet weight and height requirements and, in some cases, help them avoid involuntary separation.

After Os left the military in 2004, it was a natural fit to continue on the path of physical training since he is a natural leader and dedicated to cultivating the physical body. He began by working at Results Fitness and Urban Body, bringing clients through various programs to fit their needs, including body weight, strength and conditioning training, and conventional training. In 2008, Os gained his RKC certification (Russian Kettlebell Certified) in Kettlebell training and integrated this rigorous and effective training method at Iron Core Kettlebell Strength & Conditioning. He went on to earn his CK-FMS (Certified Kettlebell - Functional Movement Specialist) in 2008. In addition, Os is a Z-Health Certified coach in the R, I, and T phases. Os earned his CSCS (Certified Strength & Conditioning Specialist) designation from the National Strength & Conditioning Association in 2023. By integrating these modalities into his training, he began seeing dynamic results in his clients, including increased strength, flexibility, fewer injuries, and healthier movement patterns.

Os believes the benefits of physical activity go far beyond external body composition, including better movement, increased energy, fewer injuries, more confidence, better mental health, and internal physical health.
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Accepting new students. Training offered in person.
Website: www.ironcoreway.com
Contact: Click to contact


Alejandro Guajardo
Os is a fantastic trainer and coach. Coming from no Kettlebell experience he help me set a good foundation and understanding from the start. Great knowledge on StrongFirst and Zhealth, which I benefited from immensely.
True pleasure to train with and highly reccomended.

Eric Addis
I have benefitted greatly from Os. He has a deep understanding of multiple training modalities (kettlebell, bodyweight, barbell,etc) and his application of various drills from the world of Z Health are always on point. Along with improving my skills and my understanding of those skills, he is a pleasure to train with. I can not recommend Os enough.


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