Jeremy Ethier

Who Is Jeremy Ethier?

Jeremy Ethier is the Canadian kinesiologist and fitness creator who built 6 million YouTube subscribers — and a fitness education company called Built With Science — by doing something the fitness YouTube category had systematically avoided since its inception: citing the actual research behind every recommendation he made, explaining the mechanism by which each exercise or nutritional strategy produced its claimed effect, and trusting his audience's intelligence enough to walk them through peer-reviewed exercise science rather than just telling them what to do and asking them to trust him. His channel, launched in 2016, arrived at a moment when fitness YouTube was dominated by physique-first creators whose authority rested on their appearance rather than their credentials, and whose advice ranged from genuinely evidence-based to dangerous bro-science. Ethier's kinesiology background — a university degree providing formal training in human movement, biomechanics, exercise physiology, and research methodology — gave him the ability to evaluate the fitness research literature that most fitness creators ignored, and his communication gift gave him the ability to translate that evaluation into protocols that 6 million subscribers could implement without a degree in exercise science.

The specific content format he developed — taking a specific fitness question ("Which chest exercises produce the most muscle activation?", "What is the optimal training frequency for muscle growth?"), citing multiple studies, analyzing methodology quality, and extracting a specific practical protocol — is what the Built With Science identity delivers: not inspiration, not entertainment, but the actual science behind what works and exactly how to implement it. His audience's specific response to this approach, documented across comment sections that read more like forum threads than YouTube comments, is not "this was motivating" but "this changed how I train" — evidence-based fitness education producing behavior change rather than passive engagement.

Origins: Kinesiology Degree & the Fitness Misinformation Gap

Jeremy Ethier launched his YouTube channel in 2016 with a specific editorial thesis that distinguished it from essentially every fitness channel that preceded it: rather than building a fitness platform around his physique, his personality, or his training intensity, he built it around the research literature — the actual peer-reviewed studies in exercise science and sports medicine that professional kinesiologists, physical therapists, and sports scientists used to design training programs, but that had never been translated for a general fitness audience in accessible, implementable format. His kinesiology degree provided both the methodological tools to evaluate research quality and the biomechanical knowledge to explain why specific exercise positions and movements produced specific muscle activation outcomes. His early videos — "The Most Effective Chest Exercises Ranked," "How to Build Muscle," "The Optimal Weekly Workout Schedule" — performed well not because they were entertaining but because they answered fitness questions with more specificity and more evidence than any existing YouTube content did, and that specificity produced the search discovery and social sharing behavior that grew the channel from zero to the fitness category's most credentialed voice.^[1]

Built With Science, 6M Subscribers & Research-Backed Commercial Programs

Jeremy Ethier's commercial evolution from YouTube creator to fitness education company founder followed a logical path from the trust his research-based content established: an audience that watched his videos to understand the science behind training was self-selecting for the specific consumer who would purchase a structured training program built on that science. Built With Science — the company and workout program brand he launched alongside the channel — offers multi-week training programs that apply the research principles his videos explain, positioned as the commercial implementation of the free educational content the channel provides. This content-to-product funnel is unusually clean in the fitness category because the product genuinely derives from the content's thesis rather than being a tangentially related merchandise play: if you watch a 3Blue1Brown video on linear algebra and want to learn more, the path is additional study; if you watch a Jeremy Ethier video on optimal training frequency and want to implement it systematically, the Built With Science program is the direct next step. His 6 million subscribers at 14 million monthly views represent an audience whose engagement rate reflects active implementation rather than passive entertainment consumption.^[2]

Brand Deals & Evidence-Based Fitness Creator Economics

Jeremy Ethier's estimated brand deal rate is $35,000–$100,000 per placement, reflecting 6 million YouTube subscribers in the fitness-committed adult male 20–40 demographic with the specific commercial behavior that evidence-based content produces: an audience that buys equipment, supplements, and programs based on research-backed recommendations, and whose trust in Ethier's research credibility extends to brand endorsements that his channel's accuracy standards validate. Fitness equipment brands, protein supplements and sports nutrition companies (whose claims he could credibly evaluate), gym technology platforms, recovery tools (sleep trackers, foam rollers, resistance bands), and premium workout app and programming platforms are his primary commercial categories. His academic positioning — noting when sponsored products have supporting research, declining partnerships that conflict with what his research actually shows — creates a brand safety dynamic that most fitness channels cannot offer: being turned down for a sponsorship is a more powerful endorsement than being accepted, and his audience notices both. For fitness and health creator rate benchmarks, see our influencer pricing guide and brand deal negotiation guide.

Related Creators

Andrew Huberman's neuroscience-based performance optimization content and Jeremy Ethier's kinesiology-based fitness science content represent the two most credentialed academic-to-YouTube translation models in the health optimization category: both are formally trained in their respective disciplines, both build their content around peer-reviewed research rather than personal anecdote or physique-derived authority, and both have built audiences whose loyalty is based on demonstrated accuracy over years of content that turned out to be implementable and effective. Huberman explains the neuroscience of what affects performance; Ethier explains the exercise science of how to build the physical foundation. Their audiences substantially overlap — the same high-agency, research-oriented adult who follows Huberman's sleep and stress protocols follows Ethier's training programming because both are applying the same epistemological standard to different domains of performance optimization. Blogilates' Cassey Ho built the female-facing fitness education YouTube category at 6M subscribers with the same evidence-informed, professionally trained approach that Jeremy Ethier brought to male-facing fitness — both demonstrating that the YouTube fitness audience for genuine exercise expertise, presented with the warmth and specificity that makes it implementable, significantly exceeds what entertainment-based fitness content alone builds.

Sources

1. 1 Men's Health — Jeremy Ethier and Built With Science: The Kinesiologist Who Changed How Fitness YouTube Cites Research (2019)
2. 2 Healthline — Built With Science at 5M: Why Evidence-Based Fitness Content Outgrew the Physique-First YouTube Category (2022)

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Jeremy Ethier — Official Social Media & Links

All accounts below are the verified official profiles for Jeremy Ethier. Follower counts are approximate and updated periodically.