Jeff Sun Fitness

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725 San Aleso Ave Ste 2
Sunnyvale, CA 94085

Jeff Sun Fitness is a certified personal training service located in Sunnyvale, CA, specializing in helping clients achieve their fitness goals through customized workout plans and nutrition guidance.

With a focus on building lean muscle, losing fat, and improving mobility, Jeff Sun Fitness offers both in-person and online training options, utilizing a physiology-based approach to ensure clients become healthier and stronger every day.

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Reviews

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5.018 reviews
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Chenxuan X.
11/27/2025

I've worked with Jeffrey for almost two years and he's always been reliable, knowledgeable, and easy to work with. I really like that he always demonstrates each step in a clear and hands on way...

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Marshall C.
11/17/2025

Ive been training with Jeff for 4 years now and have high praises for the man. Regardless of what your fitness goals are, whether muscle building or functional mobility or athletic peformance,...

M K.
4/16/2025

I can't say enough good things about training with Jeff. He creates such a positive, encouraging space -- no guilt, just a great workout. What really stands out is his deep understanding of body...

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Josh D.
8/11/2024

I've been training with Jeff for almost two years now, and it's been a blast! Since my goals are more focused on power lifting and hypertrophy, our weekly sessions typically consist of a few sets...

Anthony C.
4/8/2025

I never write reviews, but I've been coming here for a while now (3-4 years or so). It has been worth every penny. Jeff is super knowledgeable and friendly. Any goals you have in mind, he will...

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