CozmoSize
Real-world Strength & Conditioning programming & facility located in Santa Clarita, CA.
Here at CozmoSize, we train many people across a wide spectrum of fitness levels, all with the fundamental goal of optimizing human performance, athletic development, and real-world strength through functional movement. Our unique programming blends resistance training and conditioning to achieve the fitness goals you have for yourself while boosting morale and building community through training.
Never worked out at CozmoSize before?! Now is your time to discover the difference and make May your best month yet with our exclusive “new member Spring special’! 💪 🚀 As a new member, your first month is just $149, and you’ll enjoy a training program where you increase lean muscle and torch fat through resistance training and metabolic conditioning sessions.🔥 You’ll also join the most supportive and enthusiastic community of bad-a$$ humans who like to have fun both in and out of the gym, so what are you waiting for?! Our next training block (and your Spring savings month) starts April 29th, so lock in your spot now by sending us a DM or texting us at 661-403-4027! 🤘🏋️
If your body is sore, tired, and looking for a recharge, or you’re just looking for some gentle stretching and mobility work, then come to ‘s monthly Recovery Class this Saturday at 9AM to
get the relief you seek. In this class, you’ll reduce muscle tension and increase your range of motion and flexibility by utilizing your body’s movement, TRXs, and self myofascial release techniques with
foam rollers and tennis balls. It’s a fantastic post-workout and MRT-week recovery AND the perfect way to prep for the upcoming CozmoSize training cycle that starts March 4th!
Class runs 9AM-10:15AM this Sat. Mar 2nd. Spots are filling up FAST, so DM us if you want to join.
🛑 PARTY UPDATES! 🛑
🚕 Onsite parking is very limited, so ridesharing is HIGHLY encouraged, especially if you plan on enjoying the open bar 🍻🥂 (please enjoy responsibly ☺️)
🚙 If you drive, utilize the free parking lot located at 13th St. & Pine St. (across from the gym) or the free structure at Main St. & Lyons Ave. (enter from Railroad Ave. & 9th St.)
⏰ the celebration goes from 6pm-9pm with the afterparty hitting Main Street in Old Town Newhall 🎉
📸 Group photo and ribbon ✂️ ceremony at 8pm
🌯 AMAZINGLY delicious food provided by
👕 The new merch is for sale at the party and preorders will be available for pick up! Cash and Venmo are accepted, and current CozmoSize members with cards on file can charge their orders to their CC!
Can’t wait to celebrate with all you past, present and future CozmoSizers. See you at the fiesta!
HOLLA! 💯
24727 Railroad Ave. Newhall, CA 91321
🗣️🗯️Save the date, cuz it’s time to PARTY! 🎊🎉
In honor of CozmoSize Fitness moving into its own facility, we are throwing a grand opening fiesta, and all you past, present, and future CozmoSizers (and your family and friends) are invited to come check out the new spot and celebrate with us!
This is NOT a workout party; this is an, “Eat, drink, and be merry with the Cozmo Community!” party, so be sure to swing by the new spot Sat, Feb 24th to enjoy food from , drinks, music, merch, and plenty of good times. 🌮🌯🍣🍻🍾🎶
Doors open at 6PM and group 📸 will be taken at 8pm so come through! HOLLA! 💯
24727 Railroad Ave. Newhall, CA 91321
🎉🎊 It’s finally here- has NEW MERCH! 👕👚We’re so stoked to be unveiling our new logo on this limited run of new CozmoSize gear, so be sure to get your preorder in ASAP! Tees & tanks are $20, long-sleeves are $25, and the crewneck sweatshirt is $35. Sizing is unisex and comes in XS-2XL. Send us a DM or text with your desired shirt style(s) and size(s) by this Friday, Feb 2, at 10AM PT to ensure you get in this first run. We’ll have your gear ready for pick-up at the CozmoSize Grand Opening party happening at the gym in mid-Feb. HOLLA!
📣📣📣 SCHEDULE UPDATE 📣📣📣 We’re excited to announce that we’ve added a 6PM training session to our small group schedule. Resistance training is M-Th, and our awesome, calorie-crushing metabolic conditioning is Friday. If interested in joining us, send us a DM here or text us at 661-403-4027 to schedule your complimentary intro session.
At CozmoSize Fitness, our members are like family, and we want you to get to know them outside of the gym, so one Monday a month, we feature a glimpse behind the scenes into the life of a CozmoSize athlete. We kick off 2024 with a guy who helped bring the new CozmoSize building to life with his handyman skills, Mr. Glenn Reeves! .reeves
Tell us a little bit about yourself: Hi, I am Glenn Reeves, and I have been a CozmoSize member for almost two years. I am mostly retired now but spent most of my career at the Jet Propulsion Laboratory building rovers for exploring Mars. My wife Claire and I have lived in Santa Clarita since 1988 where we raised our family of three sons and one daughter. Our first grandchild is now 15 months old, and we spend a lot of time traveling to the Denver area to see him. I am blessed to have a truly wonderful family. I enjoy my semi-retired life and spend my free time traveling, hiking, exercising, and working on my projects and hobbies. I have a passion for building and fixing things (I have an old project car in the garage that will eventually run again). Also, all three of my sons have their own houses that I help them work on, too.
What do you enjoy most about CozmoSize? This is such a simple and yet complex question. For me, CozmoSize is the community, the support, the challenge, the accountability, and the accomplishment. I really enjoy the workout structure and the way I am pushed to challenge myself every cycle. Matt’s program of mobility, movement, and strength keeps my old body moving. But, perhaps, what I enjoy the most is feeling like I am welcome and belong. Kudos to Matt and Kalena for making CozmoSize such a welcoming place to get healthy.
What goal do you have or want to achieve in 2024?
My goal is to stay active and healthy and be able to keep doing all of the things I love to do.
At CozmoSize Fitness, our members are like family, and we want you to get to know them outside of the gym, so on the first Monday of each month, we feature a glimpse behind the scenes into the life of a CozmoSize athlete. November features one of our bada$$, working moms and recent birthday celebrator, Eboney Calhoun !
Tell us a little bit about yourself: My name is Ebony Calhoun, and I have lived in Santa Clarita for 15 years. I have many hobbies, one of them being going to the gym, and I’ve been a member of CozmoSize since 2014. I’m married to my college sweetheart and we have three beautiful children.
What do you enjoy most about CozmoSize? The classes are designed for everyone of all body shapes and different ages. I also love the group camaraderie and that we all have one common goal to achieve, which is to be a healthier, stronger version of ourselves. Oh, and did I mention that the results are amazing?!
🚨NEW POST ALERT🚨At CozmoSize fitness, our members are like family, and we want you to get to know them outside of the gym, so on the first Monday (or Tuesday in this case b/c of Labor Day) of each month we feature a glimpse behind the scenes and into the life of a CozmoSize Athlete. September features one of our most consistent and long-time members, Bruce Krumrine!
Tell us a little bit about yourself: For those who don’t know me, my name is Bruce Krumrine. I have been lucky enough to train with since he began his four-day program. Thanks to Matt, I stayed in shape during my last few working years and have continued to stay in shape into retirement. I enjoyed a 40-year career at Princess Cruises where I was the Vice-President of Shore Excursions. I retired in 2020. My wife Julie also worked for Princess for over 30 years as the Vice-President of Public Relations. Yes, we were an office romance and Julie was the best thing that ever happened to me. We have been married for over 30 years and best friends for over 35 years. We moved from the Hollywood Hills to Santa Clarita in 1998 and raised our two sons, Duncan and Griffin, here. I can’t think of a better place to bring up kids. Now 30 and 25, they are great guys, and it seems, in some ways, like just yesterday when they were also working out with Matt.
I spent much of my working years traveling internationally, which I thoroughly enjoyed. I visited well over 100 countries and am fortunate enough to have friends and incredible memories from across the globe. As much as I enjoyed my career, retirement is terrific. It has allowed me to pursue a variety of interests that I never had time to do while working. That includes playing tennis and taking history and film classes at College of the Canyons. But, regardless of what I’m doing, I still start my day at with a group of fun and hard-working people with Matt kicking our butts and making us better.
🚨🚨 NEW POST ALERT 🚨🚨 At CozmoSize Fitness, our members are like family, and we want you to get to know them outside of the gym, so on the first Monday of each month, we feature a glimpse behind the scenes into the life of a CozmoSize athlete. August features one of our longest-standing members, Kelly Golden aka !
Tell us a little bit about yourself: Hi Cozmo Crue! I’m Kelly AKA Kel-bel. I’ve been training with Matt for 3&½ years, and it has been a journey. Five years ago I weighed 260lbs and decided to have bariatric surgery. When I came to CozmoSize after my surgery, I was 145lbs and weak. Now I am 152lbs and have MUSCLE!
Outside of the gym, I enjoy leather working, crochet, riding horses, hiking, and attending renaissance fairs with my husband, both of us in full costume. I am currently working on a pirate-themed costume!
What goal do you have or want to achieve in 2023? I have a goal of starting my hang cleans at 95lbs. I’m almost there!
What do you enjoy most about CozmoSize? The camaraderie, support, and drive. I’m super happy that I found CozmoSize. I wouldn’t change it for the world. Thank you to my loving husband, Alfredo, for supporting me in my journey. Thank you to everyone for your support, and thank you Matthew Cather for having the drive that you do. Love you all!
🚨🚨 MEMBER MONDAY ALERT 🚨🚨 At CozmoSize Fitness, our members are like family, and we want you to get to know them outside of the gym, so on the first Monday of each month we feature a glimpse behind the scenes into the life of a CozmoSize athlete. July features one of our fellow local business owners, Eddie Escobar aka !
Tell us a little bit about yourself: My Name is Eduardo Escobar, but everyone calls me Eddie! I am 37 years old. I was born and raised in El Salvador, and my family and I moved to Santa Clarita in 2002 when I was 16. My dad is a retired firefighter and my mom worked for the government in El Salvador. My sister is a Registered Nurse for LA County. I have been cooking since I was 16 years old and am a chef who owns Go Trucks Catering and 3 food trucks. Our trucks are always at local events, and you can find out where we’ll be here:
Recently I married the love of my life, and my darling wife works for the Hollywood chamber of commerce. That’s how I got to get up-close-and-personal with the sign (swipe for proof 😛)
Interests: cooking, music, sports, travel and cars. I’m a self-taught auto mechanic.
Hobbies: cars, gym, hiking and basketball.
What do you enjoy most about CozmoSize? The family atmosphere, the challenge of different workouts, seeing a group rising to the occasion, and the MUSIC!
What goal do you have or want to achieve in 2023? 20% body fat, cleaner diet, and to do pull-ups without assistance!
👋🏽👋🏽👋🏽 We're back with our 2nd installment of Member Monday! At CozmoSize Fitness, our members are like family, and we want you to get to know them outside of the gym, so on the first Monday of each month we feature a glimpse behind the scenes into the life of a CozmoSize athlete. June features one of our longest-standing members, !
Tell us a little bit about yourself: Grew up in SCV. My first serious job was QA (quality assurance, basically play testing) at WayForward Technologies (we make video games), worked my way up to Level Designer where I've been since 2009. Hobbies include overanalyzing films, video games (for work, of course), and cooking (serviceable, but working on it). I'm kind of a homebody and like hanging out with my cats. Catch me at home on a Friday night browsing Netflix.
What do you enjoy most about CozmoSize? I like how it's judgment-free. It doesn't matter if I'm not lifting the heaviest in the room, there's no criticism.
What goal do you have or want to achieve in 2023? I'm my own worst enemy. Any goal I set and accomplish will just be followed up by a new goal. Currently, I want to lower my PBF to about 15% and increase my cardio (we'll see how possible that is).
Calling all student-athletes or parents of student-athletes! CozmoSize is excited to get summer training sessions under way for the athlete looking to improve his/her strength, speed, explosiveness, agility, and overall performance for his/her sport(s). Summer training sessions will begin mid-June. DM us for details!
Happy Memorial Day! We did our Murph & modified Murph honoring and mourning the U.S. military personnel who died while serving in the United States Armed Forces. Thank you for your service 🇺🇸
🚨TONIGHT🚨 CozmoSize Member Eddie's food truck, GO Fish, will be at the Summit Clubhouse tonight 5pm-8pm! 24600 Del Monte Dr in Valencia. Support our small businesses & members if you can!
Good morning, you friggin' athletic winner! Friendly reminder that this Friday, May 12th, we are doing inbody testing in the AM and then yoga & wine at night. Here are the deets:
For your inbody, please come in 10-15 minutes before your Friday morning class starts to get your test done, and come in fasted. Water & black coffee are OK :)
Then Friday evening at 6pm in the CozmoSize gym, we'll have a complimentary 1-hour recovery yoga class led by DRENCHED manager, Tamara, followed by CozmoSize Fitness Family hang time at a local wine bar called Wine 661. Please arrive 10-15 minutes before yoga starts to allow time for set up, and remember to enter through the side door of the building and bring your own yoga mat if you have one. We'll have a few mats at the gym in case you need one.
After yoga, for those interested, we'll head to Wine 661 for some post-yoga fun and beverages. For those new to Wine 661, it's is a local-owned, upscale, quaint and cozy spot to grab a glass of wine, bubbles, beer or a non-alcoholic beverage and small bites to enjoy with friends. Located in the Kohl's/Whole Foods shopping center on the corner of McBean & Valencia Blvd, you'll find it near Corner Bakery, Starbucks, and next door to Yogurtland. Look for a familiar face behind the bar that night :)
Thanks for being a valued member of CozmoSize Fitness. See you in the gym!
🚨NEW POST ALERT🚨At CozmoSize fitness, our members are like family, and we want you to get to know them outside of the gym, so we’re kicking off a new series called Member Monday where on the first Monday of each month we feature a glimpse behind the scene into the life of a CozmoSize Fitness member. May kicks off with 2022’s CozmoSize Athlete of the Year, !
Tell us a little bit about yourself: Hi, I’m Ivy Manalang! I am an avid hiker, OCR adventure seeker, and lover of nature and the outdoors. A devoted mom and wife who works as a VP for a publications company, I don’t let my busy schedule stop me from pursuing my other passion: keeping fit and healthy!
What do you enjoy most about CozmoSize? I love that every workout consists of mobility, explosive movement, and upper and lower body focus. It’s a full body workout that targets all major muscle groups in one session. CozmoSize fitness is my roadmap to longevity!
🚨 WE ARE ONE WEEK OUT! 🚨
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The CozmoSize Super-Post HOLLAday party is Friday March 24th
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We’re getting it started at 6pm at Drifters
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HUGE shout-out & thank you to all our amazing community partners who donated these sick prizes for the give-aways!
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Tons & tons of amazing AVEDA products and goodies from the amazing
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The one month VIP membership that includes cryotherapy, sauna and Normatec from my fam
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Some super delicious & fulfilling meal preps for your fitness needs
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Two awesome gift baskets courtesy of my people
One bag containing a one hour massage, healing the mind, body and soul with Jae Morelli LMT CHT and another containing a full on works for the lashes and other goodies
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A Ford mustang droptop for the weekend and lunch for two at restaurant, Boxenstopp courtesy of
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is hooking it up big time with my go to the “Cozmo Special” which includes: men’s haircut, beard-trim and full on facial
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The house favorite from last year! The big Don Julio 1942 from Mr. Wally-Walls and
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The gym in the bag, the great TRX suspension trainer
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A joint collaboration skin care care package from Sephora and Mary Kay. Thank you
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A free month of CozmoSize Strength & Conditioning program! (Not shown)
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There is also more to come!
Can’t wait to see everyone there!
ITS THAT TIME OF THE YEAR AGAIN! (A little late again as well)
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Mark the calendar 🗓️ Friday March 24th!
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CozmoSize HOLLAday party!
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Drinks - Games - Raffles - Dancing - DJ
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At
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As always all current, past & future CozmoSizers welcome including their friends & families
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All info is listed above on the flyer, any questions just send a message! See you all then
Just in time for Memorial Day & July 4th
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Keep it OG with the Traditional Gift Shop American 🇺🇸 Flag Shirt, CozmoSize edition
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Available at CozmoSize & DM for online orders
CozmoSize HOLLAday party 2022
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I’m so Grateful for every single one of you guys. Thank you so much for coming and making it such a great night
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Thank you for being such a awesome host
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Thank you .cat.her for making everything run so smoothly
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ITS GOING DOWN TOMORROW! SATURDAY 3/19
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The CozmoSize (super) Post HOLLAday Party
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7pm at Lucille’s in Valencia (Thank you for hosting us!)
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Here’s a look at some of the awesome raffles
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AVEDA Skin & Hair care package including a haircut from
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One month VIP membership that includes Cryotherapy, Sauna & Normatec
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Massage session + Care Package with tons of goodies from
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TRX Suspension Trainer
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Golf ⛳️ Care package + awesome goodies from
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Lymphatic message + Hydration IV
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Skin Care Package from &
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High West Whiskey & Don Julio 1942
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Magnum Supplement Stack & Shaker
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Also the new run of CozmoSize Apparel will be available. Including, just in time for summer, the CozmoSize hoodie!
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See you all mañana
4 Years ago today!
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Nice Human with the awesome
Now that’s !
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The did work and lit it up
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Thank you & . It’s always a pleasure
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Now that’s
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The did work and lit it up!
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Thank you &
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Videos (show all)
Contact the business
Telephone
Website
Address
24727 Railroad Avenue
Santa Clarita, CA
91321
Opening Hours
Monday | 06:00 - 20:30 |
Tuesday | 06:00 - 20:30 |
Wednesday | 06:00 - 20:30 |
Thursday | 06:00 - 20:30 |
Friday | 06:00 - 12:00 |