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I love helping people; that's why I love my job.  Since 2015, I have helped clients heal their bodies with movement and return them to activities they thought they could never do again.  Come see what Onyx Athletic Performance can do for you.


Hello everyone, I am excited that you have chosen to get fit and I want to do all I can to help.  I am a certified athletic trainer and strength and conditioning specialist who specializes in injury prevention and rehabilitation.  Whether you already have some nagging pains or you just want to be stronger and healthier, Onyx Athletic Performance is the right place for you.


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Jumpstart Your Health

My Fitness Services

Personalized Attention for Your Goals

One-on-One Training

The Most Affordable Way to Get Workouts, Nutrition Advice, & Accountability

Online Personal Training

Private Training in the Comfort of Your Own Home

In-Home Training


Jen Sincero

“If you’re serious about changing your life, you’ll find a way. If you’re not, you’ll find an excuse.”


Contact Me

Group Fit
1731 West Baseline Road
Mesa, AZ 85202