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FierceFit Miami came about when founder, Michelle Bertran, realized that there was nothing else she saw herself doing upon graduating from the University of Miami besides becoming an entrepreneur and opening up her own gym. Since she was just 14 years old, fitness has been a great passion of hers. Michelle realized that Miami lacked a bit of variety when it came to the types of workouts that were offered. That is where high intensity interval training was introduced to her indoor bootcamp. Michelle created workouts that are short and fun, but still incredibly effective and safe.

At FierceFit, you can find people of all ages and fitness levels. As a matter of fact, we even have members who are recovering from injuries and are looking to strengthen/get back into shape without further injuring themselves. We pride ourselves in being a genuine ‘no judgement zone’ and helping others reach their fitness goals with her FierceFit bootcamp.



Born and raised in Miami, growing up Gabriel played plenty of sports like baseball, basketball, and football. Once he enrolled in South Miami Senior High, Gabriel joined the wrestling team and that is where he grew to love fitness. Wrestling showed him true discipline and perseverance. It also taught him how to control his nutrition and slim down from 170lbs to 145lbs.

During one match Gabriel got injured and dislocated his shoulder, which was a blessing in disguise. He did physical therapy for shoulder rehabilitation and learned so much that it helped him decide what he wanted in life. Gabriel then decided to pursue this field and got a Bachelors degree in Sports Medicine. He hopes to one day become an exceptional physical therapist. As a trainer, Gabriel is passionate about helping people reach their ultimate potential and making any goal attainable for our members.



William is a Miami native, he grew up in a very active environment as child. By age 10 he was weight training with friends in his bedroom and by the age of 13 he had joined his first gym. William had been performing high intensity interval training during his cardio sessions. Due to this, William has learned a lot about bootcamp style conditioning and the benefits of interval training. From this point on William never lost his passion for training, and physical fitness. Later in life with this fire still burning inside him he decided to step on stage and compete in the 2010 NPC South Florida Novice Championship followed by the NPC South Florida Gold Coast Classic Championship in 2011; placing 3rd in the Masters Division in both competitions. Preparing for these competitions taught him the importance of nutrition, daily cardiovascular exercising, high intensity training and consistency. This was the only way he was able to successfully move his weight from 226lbs, to 178lbs and successfully compete.

Since then he has become a Nationally Certified Personal Trainer through ACE (American Council on Exercise) specializing in bootcamp style training and has a mission to share his passion for daily movement for a longer, stronger and healthier life.