



Athletic Adventurer
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Athletic Adventurer
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Athletic Adventurer
Adventurous In Spirit
Capable In Body
At Any AgeCreated by M.I.S. Cassandra Fitness
New Client Offers
Please fill out the form below to receive one of the new client offers available!
Services
Let's Go Explore!
Pain Relief/Pain Management Training
Capable in Body!
Don't let pain stop you from having the life you want. let's work on minimizing your pain issues rather than just working around them.
Sports Performance Training
Adventurous in Spirit!
Want to improve at your sport? Have an exercise program personalized for you, to develop your vision, balance and coordination skills specific to your sport.
Online Sessions
Begin your adventure from anywhere!
If you have a busy schedule or are not local to San Diego there is a personal training option available for you. With Zoom you can receive personalized fitness training in the comfort of your own home.
About
Cassandra Jahn
About Athletic Adventurer
Welcome to Athletic Adventurer—your go-to source for building a capable, confident, and adventurous body at any age! Whether you're looking to enhance your movement skills, boost your confidence, or explore new activities and sports, we're here to help you reach your full potential and live an active, pain-free life.
Our Mission
At Athletic Adventurer, we believe that you can be capable in body and adventurous in spirit, no matter your age or athletic background. Our mission is to help you develop the movement skills necessary for better athletic performance, injury prevention, and most importantly, fun! Through tailored programs, we aim to improve your confidence, flexibility, strength, and coordination—enabling you to tackle new activities with ease and excitement.
My Story: From Clumsy to Confident
As a child, I wasn’t the athletic type. I was awkward, clumsy, and often struggled with coordination. While others played sports with ease, I found myself on the sidelines, more likely to get hit in the face with a ball than to make a successful play. My family wasn't very active, and it seemed like a path toward a sedentary lifestyle and health issues was ahead of me.
For years, I convinced myself that sports simply weren’t for me. I stuck to gym machines as an adult, trying to stay fit but feeling bored and uninspired by the routine. I wanted something more engaging, something that would make me excited to move and explore my body’s potential. That’s when I realized there had to be a better way to train—something that was both challenging and fun.
Driven by a desire to understand how movement works and how to improve my own physical abilities, I decided to make it my career. I became a personal trainer, dedicating myself to learning the ins and outs of athletic performance. Through years of study and experimentation, I developed a comprehensive understanding of how to enhance movement skills, including balance, coordination, and strength.
Now, I can confidently say that I’m doing things I never thought possible when I was younger. I’ve learned how to move with purpose and ease, and most importantly, I’ve gained the confidence to try new activities and sports without fear of injury. And that’s what I want for you too—confidence in your body and the ability to explore sports and movement with freedom and excitement.
The Athletic Adventurer Approach
Through years of study and hands-on experience, I learned that building athletic skills is about more than just strength training. It’s about improving balance, visual skills, rhythm, and overall coordination. With specific training methods designed to enhance athletic movement, I can help you move better, feel more confident, and enjoy life to its fullest—with less fear of injury or pain.
Whether you're a seasoned athlete or a beginner, you can achieve the skills needed for better movement, reducing stiffness and discomfort in your daily life. No matter your age, it’s never too late to start exploring and developing your athletic potential.
Why Choose Athletic Adventurer?
As a certified NASM Personal Trainer and Z-Health Practitioner with over 10 years of experience, I am dedicated to providing the tools and knowledge necessary for you to succeed in your own athletic adventure. Whether you’re looking to start a new sport, overcome past injuries, or simply move more freely, I’m here to guide you every step of the way.
Ready to Begin Your Adventure?
You deserve to enjoy life with the freedom that comes from moving well and feeling confident. Let me help you improve your athletic abilities, discover new skills, and leave the pain behind. It would be my pleasure to be your guide as you begin your journey toward a healthier, more adventurous life.
Let’s Go Explore!
With 10+ years of experience in personal training and functional movement, I'm here to help you explore your potential and achieve lasting results. Start your Athletic Adventurer journey today and experience the difference!
Certifications listed here.
NASM Certified Personal Trainer
NASM Corrective Exercise Specialist
NASM Youth Exercise Specialist
NASM Behavior Change Specialist
Z-Health Essentials of Elite Performance Certificate
Z-Health Movement Reeducation Specialist
Z-Health Movement Integration Specialist
Z-Health Movement Performance Specialist
Z-Health Exercise Therapy Specialist
Z-Health 9S: Structure Certificate
Z-Health 9S: Strength Certificate
Z-Health 9s: Stamina Certificate
If you would like to know more about NASM or Z-Health please follow the links below.
Testimonials
Sondra Forkner
I want to express my gratitude to Cassandra, for the past couple of years' training with her and how much she has helped and taught me. When I met Cassandra I could hardly walk, was in a lot of pain and could not lift weights or do squats or stand on one leg with my eyes closed; not to mention I was 25 pounds heavier! Look at me now, weighing in at 120 and for a 65-year-young, approaching "buff"! I am truly amazed with the techniques she employed and her knowledge base. The passion she shares and invokes about the body and its potential is inspiring. I look forward to a long, healthy, strong and wonderful training future with Cassandra.Christina P.
Cassandra is such a lovely person! I am so glad to have her as my personal trainer. She has taught me so much and I am never bored during my sessions, we always doing something different and have a lot of fun. She is funny and genuinely cares about your health.
Elaina H.
On every level Cassy is amazing. She is personable and well versed in her craft. I came to her with pains and ailments I didn't even know could be fixed, and she has been able to help me make amazing progress. If you have pain, she can help you. Her field of knowledge always seems to be growing, so however diverse your problem is, be assured she will attack it anyway she know how. And you'll definitely have fun doing it!! 10/10.
Robin C.
I've never felt better! This is not a one size fits all training, Cassie focuses on my individual issues and I'm much stronger, more limber and flexible than I was before I started training with Cassie. I ride endurance horses and I have noticed that I am not nearly as sore after a ride or race as I used to be. Cassie has taught me how to relax and strengthen my core which is essential to my sport.
Karen Houdesheldt
My New Year’s goal was to finally heal/recover from a hysterectomy. I still lacked lifting capabilities. I started working on exercise therapy with Cassandra. She not only helped me realize that the original doctor gave me the wrong rehab exercises, which caused continuous injuries, but also helped me realize that other previous injuries were partially caused by problems with my equilibrium. Other previous injuries and present include a broken foot. I ended up having major foot surgery 1 plate, 9 screws, and 2 joint fusions. I was in 3 boots and 4 casts in a period of 9 months total, but continued to train the rest of my body, with Cassandra, while still wearing the boot. We discovered several issues including, my lack of basic breathing, lung expansion, to my equilibrium and eye coordination functions were very much out of whack. She has brought to my attention, things no doctor has even noticed or addressed. Cassandra’s knowledge is more surpassed and valuable than I can explain in a short Thank You letter!!! She has taught me special drills and even created a personal itemized chart for me to follow so I may continue my rehab when I leave for NV. I am a retired plumbing specialist who has multiple customer service awards and had my own businesses as well and I will say Cassandra is a vital heart beat to your local community. She definitely makes a difference in the world of wellness and of loving yourself. Thank you again God Bless, Blessings and Prayers.
Emma Steed
was not the most flexible or fit person to begin with, but I’ve been a student of martial arts for many years. A year after a back injury and resulting surgery, I was forced to modify my activity to match my newly-limited range of motion. Bending over I could only get my hands to fall just below my knees. I felt there had to be hope for improvement. I came to Cassandra with plenty of motivation, but I secretly worried about getting pushed too hard. Maybe I’ve seen too much bad tv, but I imagined a personal trainer’s job was to drive the client to the point of physical and emotional exhaustion. Instead, she educated me on how bodies work in general (like, why does my neck tense up when I do a bicep curl?) and she took the time to find out what works for me, specifically. She created customized training plans that are both fun and challenging. Surprisingly, the two most common things I would hear her say is “Relax!” and “Breathe!” and I don’t know about anyone else, but those are two of my favorite things. Instead of feeling drained at the end of every session, I’d feel fired up and confident. Almost 2 years later, I’m 15 lbs down, stronger than I’ve ever been (I have a core!) and I can lay my hands flat on the floor when I bend over. I have flexibility, balance and stamina. And I’ve enjoyed every minute of the journey. I really can’t put into words all the unusual, unexpected methods Cassandra used - she is the master of the body hack. When I couldn’t perform an exercise properly at first, she’d suggest these small, seemingly unrelated drills beforehand - a stretch, a visual exercise, and, like magic, I could nail it. It has honestly changed my perception of what I am capable of. Simply put, Cassandra’s patience, encouragement and expert instruction has had an immeasurable impact on my life. <3
Start Your Athletic Adventure!
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Programs and Products
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Your Athletic Adventure Guide!
3810 Rosecrans St, San Diego, CA 92110Mon-Fri 8am - 8pm
Sat 9am-3pm619-828-5039What Is A Fitling?
Welcome Fitling
Cassandra: Randall I'm making a fitness game!
Randall: that's cool!
Cassandra: I was wondering if with your graphic design skills you could make me a little character to use in the game. Then the character could also be the mascot for my business.
Randall: sure, what would you like it to look like?
Cassandra: Well, I like the shoes and safari hat you sketched, but here's where it gets tricky. I want everyone to be able to see themselves in the character. I believe fitness is for everyone so the character must look like it could be anyone. Athletes come in all shapes and sizes so it cannot have a body type. Anyone can improve and get better at the sport or physical activity of their choice, so the character cannot have a gender age, or ethnicity either.
Randall: (long pause as he thinks.) Okay. Let me sketch some things and get back to you.
After some trial and error and a few drafts the Fitling was made! The Fitling has a safari hat because the fitling is Adventurous! Ready to explore New movements, New exercises, and New athletics. The Fitling has the sneakers because it’s always ready for physical activity and Athletics! But more importantly, to me anyway, the fitling does not have a body type, ethnicity, age, or gender. No matter what body type you are or wish to be you can be an athletic adventurer! No matter your gender, age, or ethnicity you can find your favorite athletic adventure! I’ve been told the fitling is cute! But very simple as if it’s made for kids only. So I wanted to share the story behind how the fitling was made. Athletic Adventuring is for people of all ages, 0 to infinity! You are never too young or too old to start exploring how movement works for you. Welcome to Athletic Adventuring! Please join me if you are, or would like to be, adventurous in spirit, capable in body, at any age!
Receive your Fitling Comics and fit tips from Athletic Adventurer!
You will also receive a free PDF of the self guided Athletic Adventure Game Board!
Refer a Friend
And you could each save 10%If you refer a friend and your friend makes a purchase your friend will receive 10% off that first purchase because you referred them. You also receive 10% off your next purchase after your friend has made theirs. Send your friend a link to the "New Client Offers" page on this website and remind them to put in your name in the "who referred you" box!
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