Functional Fitness
Classes Near You
In Lake Zurich

I was home visiting my family for the holidays and had the chance to check out my sister’s gym, Optimize Fitness—and I’m so glad I did. From the moment I walked in, the community was overwhelmingly welcoming. It can be intimidating trying a new gym, especially when you’re just dropping in, but I never once felt out of place.The workout itself was definitely challenging (in the best way), and the energy in the room kept me going the whole time. Everyone—from the coaches to the members—created such a positive, encouraging environment.Honestly, I wish there was an Optimize Fitness in Brooklyn, NY, because I’d join in a heartbeat. That one visit alone inspired me to finally commit to joining a gym back home. It may not be Optimize, but I’m so grateful for the experience and the push it gave me.

Trained for HYROX with my friend at Optimize Fitness and honestly couldn’t have asked for a better experience. The workouts pushed us, it was a safe place that kept us accountable, and the energy every session made it fun to show up and give it our all.We both got stronger, faster, and way more confident going into the race. If you’re thinking about HYROX or just want a place that challenges you and supports you at the same time, this is it 💪🔥

Great gym!

I’ve been part of the Optimize family for almost two years now, and the results speak for themselves. I’ve tried other gyms in the past, but this is the first place where I’ve truly felt and noticed how much stronger I’ve become.The focus on strength training here is incredible. The classes are challenging but rewarding, and the trainers are knowledgeable, motivating, and actually keep you accountable. What I love most is the flexibility—having 24-hour access is a huge plus for those days when I can’t make a scheduled class but still want to get my work in.Between the expert coaching and the fantastic group of people who challenge you every day, it really feels like a fitness family.If you want real results and a supportive environment, Optimize is the place!

Visited for the first time and had a really positive experience. The gym was clean, equipment was well-kept, and the staff was friendly. It had a welcoming vibe.

Incredible gym. Hosted a Hero Workout in honor of my brother-n-law who passed away way too young - he was a police officer with the Elgin Police Dept. They opened their gym to family and friends and walked us through an intense workout - offering coaching and motivation along the way. Amazing experience to honor Rich with so many others that miss him so much. Great gym, too! Fantastic equipment, lots of options and great team and staff!

I can’t say enough about this gym and the people behind it. I originally started coming here to support my sister after the unexpected loss of my brother-in-law, and what I’ve experienced goes far beyond a typical gym. Optimize has been instrumental in her healing journey. The team didn’t just offer workouts, they showed up with real support, opened doors to resources, and created a space where she felt lifted during one of the hardest times imaginable. That kind of care is rare. Today meant so much to our entire family. They hosted a HERO workout in honor of my brother-in-law’s 45th birthday, inviting family and friends to come together, sweat, and celebrate his life. Knowing they plan to continue this every year speaks volumes about who they are and what they stand for.I do belong to another gym as well, but joining Optimize has been a true blessing. The owners are incredible human beings, the community is genuine, and the workouts are no joke—they push you in the best way.This place is more than a gym. It’s a community that shows up, lifts each other up, and truly makes a difference.

Amazing gym! The owners are incredibly welcoming and take the time to guide you through workouts while pushing you to be your best. Great location too—highly recommend.

Beutiful Modern and clean gym.You can tell the owner takes pride in this.Very relaxing and welcoming environment!Can’t wait to sign up

Such a great gym and even better staff!

Absolutely GRATEFUL for this gym!! <3 Coach explains with details the mechanics of each exercise before doing it- It's helpful every time to hear and see it the right way. I have met only wonderful people here!! Looove the atmosphere- It's always very positive and helps definitely time goes by faster than you think! Thank you coaches for the love and attention you put into it!!

After years of starting and stopping gym memberships, I found Optimize through a good friend. From my very first class, I knew this was the place. The workouts are challenging at any fitness level. I love that M,W,F are weight days and T,Th are more cardio with weights. But what keeps me coming back are the coach and other members. The Optimize crew are such a supportive welcoming group! I alternate between morning and afternoon classes, depending on my schedule, and no matter when I go, the vibe is the same - working hard, getting stronger while having fun!

There are gyms and then there is a place that truly is an embodiment of a community and community members that work together to raise each other up. That’s Optimize for you. Where you are in competition with yourself but are cheered on by everyone around you!!! Thank you DK and thank you to the Optimize community. The best place to be a healthier you…

Strength training is excellent! Classes are in a group setting and are structured for upper body days, lower body and full body workouts. The difference maker for me is the thorough instruction on the proper techniques for lifting as well as the combination of lifts to target different muscle groups. The environment is very welcoming with owners that truly care about your experience! Give it a try, you won't be disappointed!!

I cannot say enough good things about Optimize Fitness. DK and Jen have truly put in the time and effort to not only be an active part of the community, but to show up every day to make sure you stay on track with your goals. The wealth of knowledge DK has around fitness and nutrition has been one of the biggest reasons I’ve finally started seeing the results I’ve been working toward.Not only do they practice what they preach—they train right alongside you. I completed my first HYROX last November, and now I’m completely hooked. I’ve already started training for the next one in Chicago and hope to blow my previous times out of the water. A huge amount of credit goes to their structured training program, the consistently scheduled group workouts, and the nutrition guidance DK provides.If you’re looking for a place that’s supportive, knowledgeable, and genuinely invested in your success, Optimize Fitness is it.

A small gym with a huge heart.Every workout here is thoughtfully structured, challenging, and genuinely fun. The coaches creates a supportive environment where everyone, no matter their level, feels encouraged and capable. It’s the kind of place that reminds you why you started and inspired you to keep going. Truly a big impact in a small space.

Great gym and very supportive environment. Group and individual training available. A place where regardless of age or level of fitness you can feel good!

Super supportive community! I always feel great when I'm done with an amazing workout!

If you truly want to get in shape, this is the place! I have tried so many different gyms over the years. Optimize is regimented, systematic and most of all, it’s fun.

I love this gym so much! I immediately felt at home when I joined and not once have I ever felt intimidated, even if I had no clue how to do something. The coaches meet you where you are and are there for you every step of the way. I have gained so much strength and confidence since joining, and I love my workout family!!

This place has literally changed my life! Beyond the physical changes I am living the absolute best and healthiest life I have ever lived. I started at this gym barely able to do a squat and not able to do a lunge. Within a year I was competing in my first Hyrox. Was it easy? No, but this gym family made it enjoyable. Everyone is welcome and the group is accepting and encouraging of everyone. As for the coach - DK is the best there is. He understands how to build amazing workouts and he also knows when you need support and when you need a kick in the butt. I cannot say enough about how grateful I am to have walked into Optimize when looking for a new gym!

This place has completely changed my perspective about going to the gym. Not only is it supportive, it’s actually fun to come to. The people who attend are amazing, welcoming, and encouraging, and the coaches are great at what they do. The workouts are carefully thought out, never boring, and always keep things interesting.I’ve always liked the idea of going to the gym, but I would get immediately unmotivated because I didn’t know what I was doing or had no guidance, so I usually quit. This gym has become part of my daily routine, and I genuinely love coming here. I seriously recommend this place!!!

This gym has been an amazing experience for me. The instructors are knowledgeable, supportive, and genuinely motivating. The community is friendly and welcoming, and I’ve made some great friends since joining. I actually look forward to working out here and highly Recommended!

Discovered this gym almost a year ago and fell in love so fast. Years of not exercising consistently took a toll on my body and my mind. Within 6 weeks I was moving better, way less body aches and pains and started to feel strong again and only continuing to get better. DK is an amazing trainer. Meets you where you are at, supports your abilities and encourages you to push yourself when appropriate. Jen makes you feel so welcome and is a ray of sunshine. Every single member I've run into has been nothing but supportive and kind. Everyone feels as though they belong no matter their level. Highly recommend!Grateful to have found Optimize in my town of Lake Zurich!

Optimize in Lake Zurich is a supportive and engaging gym that supports all levels of fitness!

I've been a member at Optimize for nearly 2 years and recommend it to all of my friends. DK and Jen are some of the most caring, good people I've ever met and truly care about their members.The gym is clean, well maintained, and training is well structured and challenging but doable at any stage of training from beginner to advanced. They are also an official HYROX affiliate and can help take your training to the next level to compete.When I say this gym changed my life, I truly mean it. I walked in weighing the heaviest of my life and am now in better shape in my mid 40's than I was in my 20's.The location is also super convenient and easy for me to access from the Village of Barrington. If you're looking for a gym, it's worth the drive no matter if you live right in Lake Zurich, or drive in from Palatine, Deerpark, Hoffman Estates or beyond!

When Ben Johnson says "GOOD BETTER BEST" he is talking about Optimize Fitness. DK and his trainers are "GOOD" people who care about thier members and you will get "BETTER" at everything in life with thier functional training program at the "BEST" gym in Lake county. I travel from McHenry to be a part of thier exceptional training.

Love this place. Joined a couple months ago and am on my 30th or so class session. The segments of the workouts go by quickly and I can see and feel improvements in my strength. From North Barrington, it is only a couple of minutes away.

Hands down the best gym I have ever been to. The workouts are structured to help you build muscle, loose fat, and most importantly boost confidence meanwhile everyone treats you like family. I have never seen the gym not clean. Everyday the equipment is wiped down, floors moped, and items placed back where they go! Thanks to the coaching of DK and Jen, I dropped my body fat percentage from 32% to 15% in approximately 8 months. DK creates workouts suitable for anyone, as well as uses state of the art technology such as the In body scan to give you custom Macronutrients tailored to you!

I’ve been a member at this gym for a while now, and I couldn’t be happier with my experience! The facility is always clean and well-maintained, which makes working out enjoyable. What really sets this gym apart is the welcoming atmosphere. It’s not intimidating at all, and you can tell they genuinely care about their members’ progress and well-being. If you’re looking for a place that combines professionalism, cleanliness, and a supportive community, this is the gym for you!