Kriptoknight-X
Kriptoknight-X is a coaching-focused gym in Brooklyn built to help members become stronger, healthier, and more confident. Led by Keith Collier, an ISSA Certified Master Trainer, we provide personalized training, group classes, strength and conditioning, corrective exercise, mobility work, assisted stretching, and nutritional guidance.
Whether you are just beginning or already experienced, our goal is to give you expert coaching, accountability, and a supportive community. Train with purpose, build lasting habits, and push beyond what you thought was possible.
Kriptoknight-X is more than a place to work out. We are a coaching-centered fitness community focused on strength, mobility, conditioning, confidence, and long-term consistency.
Our services include personal training, group classes, corrective exercise, strength and conditioning, boxing-based fitness, mobility work, assisted stretching, and nutritional guidance. Programs are adapted to each member’s goals and experience level.
Recovery appointments are offered separately through HL Healing Lab. Current availability and services are listed on the official booking page.
As long as I can remember, I have played sports and had a passion for exercise. That passion led me to pursue professional training certifications and build Kriptoknight-X. I am an ISSA Certified Master Trainer with additional certifications in corrective exercise, nutrition, exercise therapy, and assisted stretching. My goal is to give every client knowledgeable coaching, accountability, and a training plan built around their individual needs.
Motto: Fitness Coach & Partner.
For the past three years, I’ve dedicated myself to helping people transform their bodies and lifestyles as a fitness coach. I’ve trained clients in Fort Worth, Texas, and Los Angeles, California—two places that have shaped my approach to coaching and broadened my experience with different fitness goals and challenges. With an athletic background, I’ve always believed that being fit is more than just looking good—it’s about building discipline, strength, and confidence that carry into every area of life. Fitness isn’t something I do part-time; it’s who I am. I live the same healthy lifestyle I encourage in my clients, and I know firsthand the power of consistency and hard work. My coaching style is about more than just sets and reps. I focus on sustainable routines, proper nutrition, and mindset shifts that help people see results and maintain them. Whether you’re trying to lose weight, build muscle, or simply feel healthier, I bring the energy, knowledge, and accountability needed to get you there. My goal is simple: to help you reach yours.
Deena: Fit Coach
​After 20 years in the luxury diamond business I suffered a major injury and surgery, and found myself at 40years old, over weight, not sleeping and in chronic pain. That's when my life turned around all thanks to fitness. I joined a nationwide weight loss competition, lost 30lbs, completely changed my mindset on fitness and diet and WON the competition! From that moment my life changed forever. I understand the struggles of weight gain, getting over physical hurdles like injuries, and midlife setbacks, and I use that knowledge to help others through similar situations.
I am passionate about the connection I make with clients and changing their lives for the better one workout at a time. Currently my fitness journey has reignited my love for modeling and acting and led me to some amazing projects that I am working on.
Philip: Certified Personal Trainer & Managing Partner.
Your wealth is your health! I believe the most valuable thing we have is our bodies our minds and our time. For over 20 years I have studied and trained to maximize all three. As a certified personal trainer, nutrition specialist, and myofascial stretch specialist I am qualified to deliver effective and efficient programs that achieve specific desired results. My background from playing basketball at St. John's University led me to athletic coaching and program design. My extensive experience with various types of clients has allowed me to develop positive mental attitudes in the all the people I work with. I look forward to meeting you next!
