Meet the Trainers


Schedule a Free Personal Training Consultation

CLICK HERE to tell us a little about yourself.
You will be contacted by our Personal Training Manager within 24 hours.


Annie Kastler trainer at Flex stands on a high dive.

Annie Kastler

Annie is an ISSA-certified personal trainer with 8 years of coaching experience. Annie’s journey into fitness began after retiring from a 15-year springboard and platform diving career, during which she set multiple school records at Cal. After graduation, Annie built the only diving program in the city of Oakland, based out of Laney College. Her team is still a big inspiration to her and a reason why she does this work.

Annie enjoys making fitness accessible and fun. She incorporates many different disciplines in her training, and takes inspiration from yoga, functional fitness, weightlifting, and plyometrics. She accepts clients of all skill and experience levels and is excited to build the best possible program to fit your needs.


Brady Harris

Brady Harris is a personal trainer specializing in strength training. He is a big advocate for and believer in hard work and seeing the results from the weightroom transfer over to improve everyday lifestyle. A former student athlete (Baseball) in college, he studied Exercise science with a minor in coaching. After college he joined up with a college friend and teammate to open the Factory Fitness Center in Washington state, where he trained and coached for five years. Fitness and an active lifestyle have always been a core part of his identity and he hopes to share his wealth of knowledge with
Flex members and clients.


Charise McCondichie

Charise designs workout programs for her personal training clients that are both High Intensity Interval Training (HIIT) or low impact workouts, resulting in major body transformations, weight loss and muscle building, using dumbbells, kettlebells and bodyweight exercises. She helps clients to focus on correct form and technique.

Charise spends part of her days as a kickboxing trainer, teaching fight combos to get her clients in shape, while they learn self defense moves. She welcomes all fitness levels and non-fighters interested in learning how to train as a kickboxer, using focus pads, thai pads and heavy bags.

Charise is a member of the International Sports Sciences Association (ISSA) and currently runs 9ROUND Kickboxing Fitness studio in Emeryville. Her personal training clients include active military professionals, athletes (including former NFL and boxing athletes) and working professionals. Trained by professional powerlifter/CrossFit athlete and amateur MMA competitors, her experience can help you get stronger, feel more confident and have fun with your fitness.


Fady Asaad, Personal Trainer, Group Fitness Instructor & Stretch Therapist

Fady Asaad

With over a decade of experience in the fitness industry, Fady Asaad is a highly skilled personal trainer and group fitness instructor dedicated to helping individuals achieve their health and wellness goals. Fady specializes in High-Intensity Interval Training (HIIT), Yoga, Spinning, and Stretch Therapy, providing a holistic approach to fitness that caters to all levels of ability and experience.

Fady’s journey began with a passion for movement and well-being, leading him to acquire comprehensive knowledge in various fitness disciplines. His expertise extends to weight management, strength training, nutrition, lifting techniques, and posture correction, ensuring his clients receive well-rounded and personalized guidance.

In his HIIT classes, Fady’s energy and motivation push participants to new heights, combining cardio and strength exercises for maximum efficiency. His Yoga sessions focus on flexibility, balance, and mental clarity, while his Spinning classes offer high-energy, music-driven workouts that improve cardiovascular health and endurance.

As a Stretch Therapist, Fady employs advanced techniques to enhance muscle recovery, improve flexibility, and prevent injury. His tailored stretching routines complement his training programs, promoting long-term fitness and overall well-being.

Fady’s approach to fitness is client-centered, emphasizing personalized plans that align with each individual’s goals. He is committed to fostering a supportive and inclusive environment, empowering his clients to build confidence and achieve sustainable results.

Whether you are looking to lose weight, gain strength, improve your nutrition, or correct your posture, Fady Asaad provides the expertise and motivation needed to transform your fitness journey. Join his classes and experience a transformative approach to health and wellness.


Christopher Mullins

Christopher Mullins is more than a personal trainer; he’s your guide to a vibrant life. With a deep- rooted love for nature, Christopher harnesses the power of natural movement patterns to elevate your well-being. As a NASM-certified trainer, Christopher believes in meeting clients “where they’re at.” He combines compassion with pragmatism, tailoring each fitness journey to your unique needs. Whether you’re a beginner or a seasoned athlete, he crafts a personal roadmap to success. Christopher’s contagious positivity infuses every session. As you work together, you’ll discover a newfound energy, resilience, and joy. Because health isn’t just about physical strength; it’s about happiness too.


Jonathan Devoto

Jonathan Devoto

Jonathan Devoto is a NASM-certified Personal Trainer & Corrective Exercise Specialist, FRC-certified Joint Strength & Mobility Specialist, and CAMTC-certified Massage Therapist. Specializing in injury reduction & rehabilitation, he combines these modalities to help clients improve strength, mobility, neuromuscular function, and overall embodiment. Outside of work, Jonathan is a life-long tap dancer, enjoys practicing chi-gong, hand-balancing, and spending time in nature. .


Bruce Cannon

Bruce Cannon

Bruce has a been in the athletic industry since the early 80’s. A physical education major at Sacramento State where he competed in Cross-Country and Track graduating in 1991. He’s competed in track events from 400 meters to 50 miles. With a coaching background in running, baseball, basketball and softball, Bruce has been a 2-time winner of Coach of the Year – Positive Coaching Alliance for Pleasant Hill Baseball Softball Association. Utilizing NASM training to expand his knowledge with additional training in Nutrition and TRX. He believes in focusing on form to build strength and endurance, while creating programs in and outside the gym. Bruce’s favorite activity is spending time with his two incredible kids and sharing time with special people in this life.


Shaina Seidenberg

Shaina has a BA in dance from UC Irvine, is a certified personal trainer, yoga instructor, and behavior change specialist. She has extensive experience instructing in various settings. Shaina takes a holistic approach and likes to include lifestyle and nutrition coaching while working with clients as a personal trainer. Her specialties include general movement assessment and coaching, and strength and conditioning improvement.


Schedule a Free Personal Training Consultation

CLICK HERE to tell us a little about yourself.
You will be contacted by our Personal Training Manager within 24 hours.