Hi, I’m AJ Fisher, creator of HYPOXiX.
I created HYPOXiX for the person who wants to achieve real results from exercise without feeling drained, using a method that builds deep core strength while calming the nervous system.
Created by celebrity trainer and exercise scientist AJ Fisher, the HYPOXiX 9-Week Collective is a guided breath and movement experience that teaches you how to integrate the proprietary HYPOXiX breathing method into functional exercise.
Through short daily videos and a supportive community, you’ll learn techniques designed to improve core strength, mobility, posture, and nervous system regulation while helping you exercise more efficiently to support greater strength, improved body composition, and long-term fitness with less stress and impact on the body.
What is HYPOXiX Breathing?
After years of performing on Broadway and working professionally as a personal trainer, I became increasingly fascinated by the relationship between breathing, stress, physical performance, and the nervous system.
What began as personal exploration eventually became over 20 years of studying how breathing patterns influenced my clients, movement systems, and research protocols.
Over time, I began developing a method that synchronizes breathing patterns directly with movement — a breathing technique I have now been formally studying in research settings for the past seven years.
Through years of research and real-world application, I discovered that the way we breathe during exercise can dramatically influence how the body responds to physical and mental stress.
Over time, these patterns become more automatic.
The body learns how to move differently.
Breathe differently. Respond differently.
HYPOXiX was created to progressively train these adaptations through a structured breath and movement system designed to build strength, resilience, mobility, nervous system regulation, and deeper connection to the body from the inside out.
The goal is not simply to exercise harder.
The goal is to change the way the body responds to movement, stress, recovery, and performance from the inside out.
THIS ISN’T JUST A WORKOUT. IT’S TRAINING YOUR SYSTEM.
"It’s so wonderful working with her… she really loves working on posture, targeting deep core, and mobility strength work"
- Danai Gurira
Who is AJ?
AJ Fisher, MSc CSCS
AJ Fisher is an exercise scientist, inventor, researcher, and performance coach with more than twenty years of experience helping individuals optimize health, performance, recovery, and longevity. A former Broadway performer turned exercise scientist, AJ has built a career at the intersection of movement, breathing, physiology, and human performance, developing innovative methods that bridge scientific research with real-world application.
AJ is the founder of HYPOXiX, a groundbreaking fitness and wellness system that integrates functional movement with evidence-based breathing strategies designed to improve core function, breathing efficiency, nervous system regulation, body composition, recovery, and cognitive performance. What began as a breathing method to restore postpartum core function has evolved into a comprehensive system now being studied for its effects on metabolism, oxygen utilization, lactate production, cognition, and women's health.
She is also the inventor of Ab-Ribbon®, an abdominal proprioception device designed to improve breathing mechanics and core activation, and BANDSQUID®, an innovative resistance band system engineered to optimize band length, tension, and attachment points for more effective training.
As a researcher, AJ has conducted multiple studies examining the effects of controlled breathing integrated with exercise. Her first study demonstrated statistically significant improvements in body composition, strength, metabolic rate, and oxygen utilization. Her second study, conducted in partnership with the New York Institute of Technology, investigated the effects of controlled breathing and intermittent hypoxia on lactate accumulation, heart rate, oxygen saturation, and exercise performance. She is currently launching her third research project examining the effects of controlled breathing and altitude exposure on cognition and women's health.
AJ is also the founder of the HYPOXiX Institute, a nonprofit 501(c)3 organization dedicated to advancing research, education, and accessibility in the areas of breathing science, exercise physiology, altitude training, women's health, and human performance.
Widely recognized as a leader in performance training, AJ's clientele includes Academy Award nominees, Broadway performers, television actors, fashion leaders, entrepreneurs, executives, public figures, and major film and television productions seeking to help actors build strength, resilience, cognitive sharpness, and an injury-prevention advantage for demanding roles. Clients include Danai Gurira, Karlie Kloss, Sarah Jessica Parker, Gwyneth Paltrow, Stella McCartney, Amy Schumer, Jessica Seinfeld, Jerry Seinfeld, Blythe Danner, Bette Midler, Lauren Cohan, Christian Serratos, Susan Kelechi Watson, Corey Stoll, and others.
Her work has helped prepare clients for magazine covers, demanding film and television roles, live performances, high-pressure professional environments, and physically challenging adventures around the world. She has also collaborated with leading global brands including Adidas and Reebok on campaigns featuring Karlie Kloss and Danai Gurira.
Driven by a fascination with oxygen utilization and human adaptation, AJ established New York City's only sea-level altitude training studio. Through her work in altitude physiology, breathing science, and performance optimization, she has become a sought-after specialist for athletes, executives, performers, adventurers, and production companies seeking to maximize performance while minimizing fatigue, injury risk, and recovery time. Her expertise has helped prepare clients for high-altitude expeditions, demanding productions, and elite-level performance challenges.
At the heart of AJ's work is the belief that extraordinary results come from the integration of science, consistency, and enjoyment. Drawing upon a fifteen-year Broadway career and more than two decades of coaching experience, she continues to create innovative systems that help people move better, breathe better, think better, and perform at their highest potential.
AJ resides in New York with her husband and two children and remains committed to advancing the fields of breathing science, exercise physiology, women's health, and human performance through innovation, education, and research.
AJ's training system is the Harvard of boot camps
"AJ's training system is the Harvard of boot camps; the Broadway of rhythm and joy; and the Mayo Clinic of exercise science - resulting in jaw dropping transformations
AJ is the most talented, inspiring and knowledgable trainer online today. What's more: she has heart and integrity. I am a Pilates & Yoga teacher; I have owned a studio in Hudson NY for 20 years. I train with the most highly regarded teachers in my industry. I grew up in a gymnasium, my father has a PhD in physical education. Trust me when I say - AJ is the BEST.
AJ is training the world's most successful celebrities and elites - because they are the best at what they do and so is she. The fact that she offers a virtual group training with personal attention - at such a reasonable price - further drives home how special and unique AJ really is. She is giving all of herself, all of the time - with humility, service, and grace. Bottom line, I lost 7 lbs, I sleep deeply now, and I got excited about fitness again.
If you're stuck in a stale exercise routine, you're bored by the Class and their big hair, your spin instructor played that last one-note song, your butt and hips are too tight from Barre Class, maybe you need a hip replacement from your Tracy Anderson donkey kicks - well stop it and come train with AJ.
Be renewed by a truly BALANCED routine based in cutting edge science. Train with someone who actually cares about you and the health of your body."
Nicole K
Hudson, NY
After the first week of doing regular breathing my Gl system was the best it's been in years
"AJ's bootcamp is like no other program that I've done before and I've tried several different programs!
First of all, as a trainer and individual AJ is positive, extremely smart and passionate about what she does and very caring. Her energy and enthusiasm during the workouts is unparalleled and she is extremely authentic. Her positive energy is contagious and left me laughing and smiling during and after the workouts (which also made me look forward to them!)
At the risk of sounding dramatic, the HYPOXiX has been life changing for me. I have a stressful job which puts a lot of stress on my own nervous system. I have struggled with IBS for years and take daily medication which is pretty inconsistent in terms of how helpful it is. After the first week of doing regular breathing my Gl system was the best it's been in years. Throughout the course I actually stopped taking my medication and I have only needed to use it a handful of times since. I have struggled with significant bloat, pain, discomfort and frequent need to go to the bathroom and these symptoms have decreased significantly and on most days I don't have them at all.
The breathing has also significantly decreased my anxiety. I can't tell you how much of a blessing this is! AJ's program created the lifestyle change I was looking for. After her workouts I feel energized and positive. She scales everything and gives plenty of options to meet any exercise level.
This is the first time in years I've actually started to notice a change in my core/abs - and it doesn't involve hours of crunches!! Working out with AJ is not easy but it's worth it and has the potential to have significant positive impacts on your life. I think the other great thing is that her program is sustainable - I feel very clear about what I will continue to do moving forward.
As a person who doesn't have a lot of time to think about what to do to work out - having a clear plan and knowing that it's an effective and positive use of my time on so many levels is amazing."
Kelly D
Weymouth, MA
Gregg C
IT Professional
"AJ's program helped me get to a level with my overall health and fitness that I thought was unattainable without extreme changes in my diet and exercise routine. The workouts can easily be modified to make them as difficult as you want, allowing you to tailor them to your fitness level. You also make the most of your time by working multiple muscle groups with each move. The breathing routine brings everything together, making it the most efficient and effective workout I have ever experienced. After completing 4 months of Hypoxix training, my overall endurance with other athletic activities is unbelievable! If you are looking to get into the best shape of your life or just to be a healthier you, this is for you!"
Liz L
Vancouver, BC
"I'm consistently more and more impressed with all the options available. There's literally a workout for whatever I feel up to doing at any particular time. Some days I'm
pumped for cardio and on others I feel mentally and physically tired and don't want to do aaaanything and then flow (workout) hits the spot just right. Whichever exercise I do leaves me feeling great. I've never been able to stick to something like this. It feels great and you're so inspiring. I like to know the "why" behind most things I do and I love that you remind us of the benefits as we go. I don't know anything that can be improved.…it seems you're always ahead of anything I can think of. You're offering things before I even know I needed them."
Heather S
Portland, OR
"I just completed the recent 8 week boot camp and I'm feeling so strong! The last bootcamp totally transformed my body. I used to have chronic back and shoulder pain. My abs didn't work well after having 2 c-sections. Now I'm strong and pain free. I have muscles popping out in places I've never felt before. I feel like I have my body back! I'm so excited to wear my old jeans again and maybe even a bikini this summer?!!! I work as a Lactation Consultant with new families. I'm kind of a health and wellness junkie. I love cooking and
recently started a mini sprout and micro green farm in my kitchen. I'm also really into mountain biking and skiing. This program has helped me enjoy those sports again to the fullest!"
Kelly D
Weymouth, MA
"AJ! I owe you before/after pics!Il I've learned so much in your 8 week course, never felt stronger and yes more CONNECTED to my core. I use your breathography technique all the time, during a hike or at work or sitting on the couch or when I'm cold or stressed or whatever! Love it SO MUCH! THANK
YOU!!!!"
Ally V
Salt Lake City, UT
Your breathing technique helped me find my deep abdominals for the first time in almost 20 years, I was able to do the supine (and even seared tilted back) abdominal work without pain in my hip flexors/psoas. Thank you so much! That was huge for me. In addition your approach and cueing to glute and hamstring strengthening was also incredibly helpful. As I mentioned before, I am quad dominant and always have a hard time finding my glutes and hamstrings. As the series progressed, I was amazed at how much easier it was to find them.
Carmela P
Roanoke, VA
"I love the way you balance things out with the different muscle groups. Other workouts made me feel like I overworked a muscle group and had to take a day off. Thanks for all the work you put into to this! I agree with others saying that it is the first
time I have been successful with a program since before I had kids (almost 30 years!!)"
Melinda D
Roanoke, VA
"I just want you to know that in the past few days, I have had three people ask what I am doing to look so good, one just now by the pool and at 58 years of age, I am wearing a two piece. Telling them all about you:) Again I say, the combination of everything you do, intermittent fasting, breathography, low impact movements, and injury prevention strategies have done more for me than anything I have every tried. Just rode my bike up a very steep hill without stopping, hiked a pretty hard trail climbing rocks in Acadia, and many other things that when completing, I say "thank you AJ": You have a gift and a passion and I thank you for sharing with those of us who cannot afford the celebrity personal trainer prices lol. And the choreography that challenges my brain each workout. Both my grandmother and mother had Alzheimers/dementia so that is something always in the back of my mind."
Adele M
Brooklyn NY
"I'm just finishing up the 8 week bootcamp with AJ and it has changed my life. I've been a yoga teacher and fitness instructor for decades, but I had extensive spine surgery in 2020 and this is my first exercise routine since then. My spine is now fused from T10 to my pelvis, (I have a lot of titanium in my spine!) and I have been able to do all of the movements in this program, with a few modifications. I am for the most part without back pain for the first time in decades. The breath work has given me the "brace" that I need to do these movements. AJ Fisher is the total bomb, I've never met anyone in the fitness industry with the breadth of knowledge
education and coaching skills that she has. She's also tremendously encouraging and supportive."
Brianna B
Seattle, WA
Hi AJ! I've been on vacation in Hawaii for the last few davs and HOLY COW I CAN SEE MY ABS!! I've seen so much more definition in my abs. Especially right under my belly button which has been a difficult place for me to lose fat. On top of that, when I was snorkeling I was able to duck dive down and hold my breath for way longer than I've ever been able to. I just wanted to share this with you! It has been such a wonderful experience being a part of your program and I can't wait to continue the journev. Feel free to share this testimony and photos where ever you'd like!!
Carol M
NJ
"Just letting you know that my abribbon and breathing are helping me with my bone on bone hip pain while I await my surgery for a hip replacement. My surgeon's office called it "lamaze" for hip pain because I use it whenever I have to walk a block or more! I am so glad that I signed up for boot camp in February. Learning Hypoxix breathing has
been so helpful with pain management!"
WHAT HAPPENS AFTER 9 weeks?
HYPOXiX ON DEMAND LIBRARY
Continue OTT for $10/Month or Join the Next Cohort in 9 Weeks
Frequently Asked Questions
Do I need to attend live?
If you miss a live class, don’t worry! The daily and weekly classes will be posted for you to take at your own pace. Joining live at either lunchtime or right before dinner adds the community aspect that is such a joy to experience if you are able to synchronize your schedule!
What If I miss a session?
Because there are scheduled days off from the total body classes, you can make up your class on another day that week easily.
Is this suitable for beginners?
HYPOXiX is especially suitable for beginners because all movements are modifiable, and AJ’s research has shown that the breath-work that is done with the movement enhances the results of the exercise without the added impact.