The latest articles on DEV Community by gonzalo nuñez (@gonzaayrton). https://dev.to/gonzaayrton https://media2.dev.to/dynamic/image/width=90,height=90,fit=cover,gravity=auto,format=auto/https:%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Fuser%2Fprofile_image%2F3805148%2Fe58a14e9-9513-4d43-8baa-5fc3837b6529.png https://dev.to/gonzaayrton en gonzalo nuñez Wed, 04 Mar 2026 05:47:51 +0000 https://dev.to/gonzaayrton/fitguard-ai-building-a-real-time-fitness-coach-with-gemini-live-api-and-brain-endurance-training-3656 https://dev.to/gonzaayrton/fitguard-ai-building-a-real-time-fitness-coach-with-gemini-live-api-and-brain-endurance-training-3656 <h1> FitGuard AI 💪 — Real-Time AI Fitness Coach powered by Gemini </h1> <h2> The Problem </h2> <p>70% of people quit their fitness routine due to mental burnout. 30% get injured due to poor technique. I built FitGuard AI to solve both problems using Google's Gemini AI.</p> <h2> What is FitGuard AI? </h2> <p>FitGuard AI is a multimodal fitness agent that combines:</p> <ul> <li>🧠 <strong>Brain Endurance Training (BET)</strong> — a neuroscience protocol to elevate brain frequency to 50Hz before training</li> <li>📹 <strong>Real-time posture analysis</strong> — Gemini Vision detects biomechanical errors and injury risks</li> <li>🎙️ <strong>Live voice coaching</strong> — Gemini Live API for real-time bidirectional voice interaction</li> <li>🌙 <strong>Holistic recovery plans</strong> — personalized nutrition, stretching, and rest recommendations</li> </ul> <h2> The BET Protocol </h2> <p>Brain Endurance Training is a scientifically validated technique that trains the brain under cognitive fatigue to improve mental resilience. FitGuard AI implements a 4-step interactive protocol:</p> <ol> <li> <strong>Working Memory</strong> — reverse number sequences under a timer</li> <li> <strong>Mental Calculation</strong> — speed arithmetic under pressure</li> <li> <strong>Visual Pattern Recognition</strong> — identify sequences</li> <li> <strong>Neural Breathing</strong> — synchronized breathing to activate gamma waves</li> </ol> <p>The system estimates your brain frequency in Hz and adjusts your workout recommendation accordingly.</p> <h2> Tech Stack </h2> <ul> <li> <strong>Frontend:</strong> Streamlit</li> <li> <strong>AI:</strong> Google Gemini 2.5 Flash (text + vision)</li> <li> <strong>Voice:</strong> Gemini Live API with native audio (WebSockets)</li> <li> <strong>Deploy:</strong> Google Cloud Run</li> <li> <strong>SDK:</strong> google-genai Python</li> </ul> <h2> Live Demo </h2> <p>🌐 Try it: <a href="https://fitguard-ai-867186428147.us-central1.run.app" rel="noopener noreferrer">https://fitguard-ai-867186428147.us-central1.run.app</a><br> 💻 GitHub: <a href="https://github.com/gonzaloayrtonn-code/fitguard-ai" rel="noopener noreferrer">https://github.com/gonzaloayrtonn-code/fitguard-ai</a></p> <p>Built for the <strong>#GeminiLiveAgentChallenge</strong></p> <h1> gemini #googleai #GeminiLiveAgentChallenge #fitguardai </h1> gemini googleai fitguardai geminiliveagentchallenge