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Diamond Bar, CA

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Fitness 100

4.5 (31 reviews)
Open • 9:00 am - 9:00 pm

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Be at 29.7 percent body fat before training
Steven L.

I grew up in Diamond Bar and I've tried all the big and small bouquet gyms around Diamond Bar and Walnut (I don't want to name names but if you are from here, you would know which ones I'm talking about). Then I found fitness 100. Fitness 100 is a gym that has a nice environment and nice people inside. If you're just getting started to fitness and worries about ego at the gym, Fitness 100 will make you feel right at home and non of that ego and face things exist here. I started at 29.7 percent body fat and obese to now. Feels very comfortable here focusing on my own training with my trainer. There's about 7 regular trainers that trains clients here. EVERYONE of them and I mean EVERYONE is really nice and friendly. There's also a Zumba and yoga room in the back of the gym that can let clients stretch, and do other activity a besides weight lifting. And last things, the owner Steve. He's the icing on top man! He's so sarcastically funny it's unbelievable ;) Give fitness 100 a try guys!

Dong L.

My friend and I have been coming here everyday for a month now! We really like the place, its clean and fits our needs! We start seeing our body transforming already! highly recommanded for people who wants to make a change in the way they look!

My favorite work out piece!

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5 months ago

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1 year ago

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2 years ago

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2 years ago

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3 years ago

Working out with Lucio is great, he helped me to get back on track and building a healthy lifestyle

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Alexis C.

Happy to have you at our gym!

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2 years ago

i like this place because it teaches me how to exercise. I would highly recommend this because the fitness trainers makes working out fun.

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2 years ago

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9 years ago

Helpful 5
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3 years ago

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Alexis C.

Glad to hear you like the gym, it’s always a blast training you!

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5 years ago

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Alexis C.

We're glad you enjoyed it, thanks for coming in!

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10 years ago

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Steve L.

Helpful 35
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11 years ago

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6 years ago

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9 years ago

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9 years ago

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10 years ago

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9 years ago

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10 years ago

Business owner information

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Steve L.

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12 years ago

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10 years ago

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12 years ago

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Steve L.

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10 years ago

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10 years ago

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11 years ago

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11 years ago

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Steve L.

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11 years ago

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12 years ago

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8 years ago

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9 years ago

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12 years ago

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Steve L.

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10 years ago

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Ask the Community - Fitness 100

Confused with the pricing, how come it's only 15 dollars a month with trainer and 40 without trainer? Is this correct?

Thanks for the question! The original price is $40/month if you want to use the gym without purchasing personal training sessions. We offer an ongoing discount if you do purchase sessions.

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Review Highlights - Fitness 100

“When you're like, "Oh my god I could've bought like 10 boba drinks with this session," then you will work your ass off to make the most out of it.”

Mentioned in 2 reviews

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Kim's Power Fitness - Kim - A trainer that cares about her clients!

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5.0(12 reviews)
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This studio is in a shopping center near H-Mart, but not in the same plaza as H-Mart. Parking is a…read morebit hard, the lot is kind of tight and you're competing with the patients going to the doctor next door. The owner Kim is so friendly. I liked the exercises she does, it's different than the other places I've been to. When I went, she had us use a step, so we were doing step aerobics type of exercises which I haven't done in about 10 years, but we had a full body workout by the end of the session. The studio can probably accommodate about 10 - 12 clients per class. I like that she is constantly keeping an eye on all of us to correct our form while we are exercising. In addition to the power workouts, she also does nutrition and offers Pilates, yoga, and Zumba classes so you can take care of yourself mind, body, and spirit!

Following up with my previous review, Coach Kim continues to be the most talented and creative…read moretrainer I've ever seen. She knows how to make every class fun, engaging, and full of sweat while ensuring workouts are effective and personalized for every client. Her training programs are designed to push you to your limits while still being safe and enjoyable. She pays close attention to form, helping clients avoid injuries and maximize results. Beyond fitness, she's also a certified life coach who genuinely cares about her clients' overall well-being, making her sessions both physically and mentally rewarding. On top of that, her gym is always well-maintained, organized, and equipped for the best workout experience. If you're looking for a trainer who will challenge and inspire you while making fitness enjoyable, I highly recommend Kim Power Fitness!

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Kim's Power Fitness - Stretching after each workout

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Aspire Fitness Walnut - Our trainer Christy doing what she does best! Attentive, caring, and, most of all, supportive towards any fitness goal.

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5.0(191 reviews)
0.9 mi

My husband and I came to Aspire when our ldl cholesterol was high, we were at our heaviest, and…read morefeeling super unhealthy overall. We're definitely not the most disciplined people, so we knew we needed accountability. Phil and Johann were exactly what we needed! I've lost 15lbs so far, my eating habits have improved dramatically, and my lab results are now looking great. I really appreciated that Phil took the time to understand out current diet before making recommendations. It made transitioning to healthier habits feel realistic and sustainable. Johann is incredibly knowledgeable and always tailors workouts to your goals. He's great at listening and making sure you're working on what matters most to you. They're both genuine, funny, and make workouts fly by. If you're looking to improve your health and want trainers who truly care, I highly recommend Aspire!

My wife pushed me to try Aspire because we were gaining serious weight, and I knew I needed to take…read moremy health more seriously. I'm so glad I did. I'm down 10 lbs, have gained muscle, and most surprisingly I eat more greens now than I ever have in my life. It's actually become a normal part of my diet I'm a huge foodie, so changing my diet and actually making it sustainable was my biggest challenge. Phil somehow found a way to make healthier eating work for me without feeling like I was giving up the foods I love. Johann has been instrumental in my training, helping me push further with weights and gym equipment while improving my posture, strength, and overall form. I've noticed a real difference in both my physical and mental health. They're both super knowledgeable, relatable, and really cool guys to work with. Definitely worth the investment!

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Aspire Fitness Walnut - Love our community here. Appreciate every single person that walks through these doors.

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Aspire Fitness Walnut - Cindy. 164-121, 4 months progress. Amazing work!!

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Ambitious Fitness - Attention to detail

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5.0(16 reviews)
6.1 mi

I've been working out with Pablo and his trainers for about a year at Self Made Training Facility…read more The facility is clean, has great music and has tons of different machines, an octagon, treds, etc. Since I've started, I've become more lean, stronger and can do exercises and cardio that I wasn't able to do before. Pablo has not only helped me greatly with the physical aspect but as well as with nutrition. It's always difficult planning out meals and what to eat when you're busy with work and kids, but he truly makes it simple and easy. It's not only Pablo, but the entire Ambitious trainers that really make us feel like family. Our son has even been a part of Ambitious fam for the past couple of months. He's been working with Javie in the Ambitious Kids class and has had a huge improvement in his movement, cardio, strength and agility and more importantly his confidence and motivation. Javie has has an incredible ability to motivate these kids and make fitness fun.

This review is way way waaaaaayyyy past due!! Where should I start?…read more My Story: So, a little over a year ago, I had miscarried what would have been our 4th baby. I was going through such a tough tough time both mentally because of the loss and physically from being pregnant. I had done everything from boot camp, yoga, and cycling. You name it, I've done it. While checkin out my friends posts and stories on Instagram, I kept seeing posts for a facility that opened up in Chino Hills, Self Made Training Facility with Pablo from Ambitious Fitness. I contacted him and the rest is pretty much history. Myself, my husband, niece, nephew and son all train with Ambitious Fitness. Best things about Ambitious Fitness: 1) Pablo and his team (and I mean every single one of them) are incredibly passionate and love what they do, and it totally shows in their energy and the way they carry themselves. 2) They have this amazing ability to push you beyond what you think you can do. You would have never thought that this Asian girl who only played badminton and piano as a sport could deadlift 275lbs. 3) They make sure you will achieve your goals and get results. My results: Being only 125 lbs in college, it was hard to believe I would get to as much as 168lbs and 36% body fat, but I did. After a year with Pablo I got down to 148lbs and 19.1% body fat at my lowest. I am more physically fit than I ever was and mentally stronger. Hit Ambitious Fitness up!! If it's for your health and for your future, it's definitely worth a try.

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Ambitious Fitness - EXPLOSIVE TRAINING FOR ATHLETES

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Speaks Mandarin
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My husband and I came to Aspire when our ldl cholesterol was high, we were at our heaviest, and…read morejust feeling really unhealthy overall. We're definitely not the most disciplined people, so we knew we needed accountability. Phil and Johann were exactly what we needed! I've lost 15lbs so far, my eating habits have improved dramatically, and my lab results are now looking great. I really appreciated that Phil took the time to understand our current diet before making recommendations. It made transitioning to healthier habits feel realistic and sustainable. Johann is incredibly knowledgeable and always tailors workouts to your goals. He's great at listening and making sure you're working on what matters most to you. They're both genuine, funny, and make workouts fly by. If you're looking to improve your health and want trainers who truly care, I highly recommend Aspire!

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Aspire Fitness Rowland Heights - David 208lbs-175lbs. So happy for you brother!

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Fitness 100 - healthtrainers - Updated October 2026

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