Behind Gym Doors is a fitness-business show with a heavy operator bias. It is not mainly about workouts. The focus is the business sitting behind the workout: revenue, retention, sales, marketing, staff, leadership, standards, and owner psychology. Mike Arce often teaches in a direct training style, especially when breaking down gym metrics. He treats numbers as decision tools. Attrition becomes a retention-length calculation, sales opportunities become process gaps, and revenue targets become a way to judge whether the model is actually working. The solo episodes move fast, with formulas, warnings, benchmarks, and clear pressure on owners to measure what matters. The field-training episodes are more tactile. A sales call at The Collective becomes a lesson in energy, repetition, appointment commitment, gifts, personalization, and making a prospect feel heard before arrival. Guest conversations bring in broader examples from fitness and adjacent businesses. Sheetal Guttigoli talks through operating three Club Pilates studios and selling them for a multiple seven-figure outcome. Doug & Thea Wood connect The Hive with culture, purpose, education, and bigger community goals. Brady Edwards brings YouTube, podcasting, creator economy context, transcription, and lead generation into the conversation. Akshay brings a framework for fear, struggle, and plateau-breaking. Michael Bernoff brings language, communication, NLP, and HIT into a sales and marketing setting. The show can be promotional around GSD Gyms and the 100K Plan, but the core value is still in the practical operating lens. It keeps asking what a gym owner should track, practice, fix, or raise as a standard. The result is a brisk, coaching-heavy feed for owners who want a more disciplined business, not just a busier studio.