Sun Functional Movement

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San Jose, CA
Sun Functional Movement

In-person and online personal training based in Sunnyvale, California. Specializing in weight loss,

10/29/2026

Knees don’t love squats or lunges right now? Push a sled. 🛷

A sled push only goes forward. There’s no lowering phase, so you can train your legs hard without beating up your knees, and you won’t be wrecked with soreness the next day.

✅ Builds quads, glutes and calves with very little knee stress
✅ Gets your heart rate up fast, so you get strength and conditioning together
✅ Easy to scale: add plates for strength, go lighter and faster for cardio

Cue: lean in with your arms long, drive through the balls of your feet and take short, powerful steps.

📍 Sun Functional Movement, San Jose. Free consult, link in bio.

10/27/2026

The most underrated squat in the gym? We think so. 🏋️

With a Zercher squat, the bar sits in the crook of your elbows instead of on your back. Holding the weight in front forces you to stay tall and makes your core work hard on every rep.

✅ Builds legs, glutes and upper back at the same time
✅ Your torso stays more upright than in a back squat, which suits a lot of lifters with cranky lower backs
✅ No need to reach back for the bar, so it’s easy on tight or achy shoulders
✅ Carries straight over to real life: lifting boxes, kids, groceries

Tip: start light, since your arms adapt to the bar slower than your legs. A pad or towel on the bar helps.

📍 Sun Functional Movement, San Jose. Free consult, link in bio.

10/25/2026

This is what full depth with control looks like. 👏

The pause takes away the bounce, so your legs have to do all the work at the bottom, which is the position most people are weakest in.

✅ Builds strength and confidence in a deep squat
✅ Improves ankle, hip and knee mobility under load
✅ Carries over to real life: getting off the floor, lifting kids and staying independent as you age

Try a 3 second pause, then drive up.

📍 Sun Functional Movement, San Jose. Free consult, link in bio.

10/24/2026

As we age, we lose power faster than we lose strength. Here’s how to keep it. ⚡

The kneeling jump goes from both knees to your feet in one explosive move, all from your hips. It’s low-impact on a soft box and teaches you to land under control.

✅ Trains fast-twitch power for catching yourself, sprinting and getting off the floor
✅ Strengthens your hips and helps your body coordinate fast movements
✅ Teaches soft, safe landings

📍 Sun Functional Movement, San Jose. Free consult, link in bio.

10/23/2026

Your knees need to get strong at the bottom of the range, not just the top. 🦵

This is a cable-assisted reverse nordic. Mei-na kneels with her knees planted, leans back slowly and lets the cable help her back up. The front of her thighs (quads) is working while fully stretched, and most of us almost never train that range.

Why it matters for staying healthy:
✅ Builds strength in the quads and the tendons around the knee, the ones you rely on for stairs, squats and getting up off the floor
✅ Stretches out hip flexors that get tight from sitting all day
✅ Because the cable helps, you choose the difficulty. It's joint-friendly and you can scale it at any age

New to these? Use more help from the cable, only go halfway down, and add a little range each week. Slow and controlled always beats fast.

Strong knees now = staying active for decades. 💪

📍 Sun Functional Movement, San Jose

Want help building knees that last? Link in bio for a free consultation.

09/25/2026

A little look inside SunFM —

From the equipment to the little details, we’ve been intentional about creating a place where you can come in, put in the work, and feel good doing it!

09/21/2026

Meet the people behind SunFM ☀️

Our coaches bring different backgrounds, experiences, and approaches to training, but we’re all here for the same reason — to help you move better, get stronger, and feel better doing it.

JEFFREY SUN
Founder & Head Coach

Education:

B.S. Human Biology - UC Santa Cruz
ACE Certified Personal Trainer
Division III Athletic Training Internship
CPR/AED Certified

CRYSTAL SUN
Coach

Education:

B.S. Neurobiology, Physiology & Behavior — UC Davis
CrossFit Level 1 Trainer (CF-L1)
Division I Athletic Performance Program
Competitive Gymnastics Background

ALAN MORETT
Coach

Education:
B.S. Kinesiology - San Jose State University
NASM Certified Personal Trainer

JUSTIN MA
Head of Marketing

Education:
B.S. Computer Science - UC Berkeley
NASM Certified

09/18/2026

We’re officially open! 🎉

Thank you to everyone who came out to celebrate the grand opening of SunFM with us. Seeing the space filled with so many familiar faces, new faces, and so much energy made all the work behind the scenes worth it.

We’re so excited for what’s ahead and grateful to everyone who helped us get here.

Welcome to SunFM☀️

09/06/2026

We are officially opening our doors, and you’re invited to Sun Functional Movement’s Grand Opening party! Come check out the space, meet your future workout crew, and see what our community is all about.
🗓️ When: Saturday, September 12th | 2:00 PM – 5:00 PM
📍 Where: 1401 Parkmoor Ave Suite 100, San Jose, CA 95126
Here’s what is waiting for you:
- Delicious food & local refreshments
- Awesome giveaway drawings
- A chance to mingle with our incredible trainers and gym members
Whether you’re looking for a new fitness home or just want to grab a bite and hang out, everyone is welcome. Bring a friend, bring your energy, and let’s kick things off right!☀️
Please RSVP via this link: https://partiful.com/e/6D0T46MNffD6JXqTerRU?c=z-LAlXvN

08/25/2026

🌟Client Showcase🌟

Wanted to showcase one of my longtime clients, Mei-na! In this video, she is Zercher Squatting 52.5lbs- a weight that even some of her friends doubted she could do!

What makes this PR even more special is knowing where she started. Two years ago, Mei-na wasn’t squatting at all because of persistent back and knee pain. Through consistent training, patience, and putting in the work, she completely changed what she is capable of doing.

Now she is setting squat PRs almost every week! Seeing that kind of progress is exactly why I love working with clients long term. It’s not about rushing the process; it’s about building strength, confidence, and healthy movement habits that pay off over time.

Keep up the great work, Mei-na! You’ve come such a long way, and I’m excited to see what you accomplish next💪🌟

Address

1401 Parkmoor Avenue Suite 100
San Jose, CA
95126

Website

https://sunfm.fitness/

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