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How to create your own AI performance coach: Optimizing your unique nutrition, recovery, and injury management needs | Lucas Werthein (Cactus)

How I AI

2025/11/24
How I AI

How I AI

2025/11/24
Lucas Werthein, a tech entrepreneur and lifelong athlete, has turned to artificial intelligence to navigate the complexities of maintaining peak physical performance while managing the long-term effects of multiple sports injuries. As he balances competitive tennis, strength training, and executive leadership, Lucas has developed an innovative system that leverages AI to unify fragmented health data into a cohesive, actionable strategy.
Faced with disjointed medical advice and isolated health metrics, Lucas built a personalized AI coach using ChatGPT to integrate MRI scans, blood work, wearable data, and nutrition logs into a single decision-making tool. This AI system operates within clearly defined boundaries—prioritizing joint protection, recovery, and sustainable energy—while avoiding extreme or unproven recommendations through strategic anti-prompts. It provides real-time guidance on everyday choices, from adjusting meals before social events to evaluating injury risks using photos and videos. The coach also synthesizes input from multiple healthcare providers, validating expert opinions and translating complex medical insights into practical steps. Lucas envisions this model as the future of accessible, on-demand health optimization, where AI bridges gaps in expertise and empowers individuals to make high-ROI decisions daily. Beyond personal wellness, he explores AI’s role in simulating collaborators for remote work, highlighting its broader potential as a scalable, privacy-conscious thought partner.
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The AI acts as a performance strategist, compiling disparate health information to drive the last mile of optimization
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AI flags early signs of overtraining and inflammation using real-time physiology data
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The AI coach includes a nutrition plan as part of its recommendations.
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AI can integrate the expertise of multiple health-care providers more effectively than a real-world team
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AI coach should not push users past recovery limits or recommend unproven supplements
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The guest uses GPT to adjust his lunch carbs after showing it a picture of his breakfast
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An on-demand feedback loop makes basic tactics more accessible and implementable
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AI reacts instantly when plans change from dinner to a party
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AI's recovery predictions match physical therapist advice, easing patient anxiety
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AI could solve healthcare interoperability by synthesizing personal health data and guiding basic health goals
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AI is a precision tool for consistency, offering high-ROI choices with population-level impact.
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Synthetic Claire could help my husband when I'm not available