内容来源：https://research.google/blog/how-we-are-building-the-personal-health-coach/

内容总结：

谷歌推出AI个人健康教练 以科技赋能个性化健康管理

谷歌公司于10月27日宣布，将推出基于Gemini人工智能模型开发的个人健康教练服务。该服务旨在解决传统健康管理方案存在的碎片化、标准化及可及性不足等问题，通过AI技术为用户提供个性化健康指导。

长期以来，用户在健康管理过程中常面临信息孤岛困境。例如初级保健医生可能建议糖尿病患者咨询营养师或健身教练，却很少提供具体对接资源。谷歌健康技术团队开发的这款AI教练具备三大核心功能：主动提供睡眠及健康洞察；基于行为科学和生理数据定制健康方案；通过可调节计划协助用户建立可持续的健康习惯。

据悉，该项服务将于近期面向美国地区符合条件的Fitbit Premium安卓用户开启公开测试，iOS版本也将陆续推出。参与测试的用户需授权访问其Fitbit数据以获取个性化建议。

技术团队透露，为实现精准健康指导，研发过程中突破了三重技术难关：首先是使AI具备处理生理时序数据的分析能力，可结合个人基线数据与群体统计数据生成定制建议；其次采用多智能体协作框架，整合对话交互、数据分析和领域专家系统；最后针对健康场景的特殊性，建立了专业评估体系来优化AI核心能力。

为确保服务安全可靠，谷歌联合消费健康咨询委员会专家团队开展产品设计，并吸纳了数千名用户通过大型研究项目提供反馈。项目采用SHARP评估框架，累计完成超百万次人工标注及十万小时专业评估，覆盖运动医学、睡眠科学、内分泌学等多个领域。

谷歌强调，该产品仅用于普通健康管理，不属医疗设备范畴。用户如有健康问题仍需咨询专业医疗人员。目前功能正在逐步完善中，公司欢迎用户通过社区论坛积极参与产品优化。

中文翻译：

打造您的专属健康助手
2025年10月27日
Shwetak Patel（谷歌杰出科学家兼健康技术负责人）与Florence Thng（谷歌健康智能产品总监）联合撰稿

我们基于Gemini模型构建的智能健康助手，以科学为依据，融合专家智慧，致力于提供个性化、可动态调整的健康指导。

快速了解
长期以来，无论是通过现有应用程序还是线下渠道，健康管理体验始终存在碎片化、模式化、可及性差等问题。例如初级保健医生可能建议患者咨询专科医师或通过减重来改善糖尿病管理，却很少提供营养师或健身教练的对接资源，这使得用户不得不自行拼凑零散信息。

我们的愿景是通过主动式、个性化且具备自适应能力的AI健康助手改变这一现状。它将无缝实现：

• 主动提供睡眠、运动及健康指标的深度解读
• 基于行为科学、经典健康理论及个人活动量与生理数据等指标，生成定制化建议
• 通过可执行、可调整的方案，协助设定目标并培养可持续的健康习惯

从明天开始，我们将面向符合条件的美国Fitbit Premium安卓用户陆续推出限时公开测试版，iOS版本即将跟进。参与测试的用户需授权调用其Fitbit数据以获取个性化分析。

这项创新得益于Gemini模型的突破性进展、Fitbit应用中全新AI优先的健康助手体验，以及Fitbit、谷歌研究院与DeepMind在前沿研究领域的持续深耕。从零构建需要时间与严谨态度，对于健康领域更是如此。我们正以科学为基础，融合学界与用户反馈，审慎推进迭代。我们将通过论文与动态持续公开进展，以下简要介绍健康助手的构建历程。

精准驾驭Gemini实现健康指导
"运动后睡眠质量会提升吗？"看似简单的问题，要像一位主动、精准、自适应的健康教练那样作答，需要多重技术创新：

首先，助手需掌握处理睡眠与活动量等生理时序数据的数值推理能力，其技术路径与PH-LLM模型展示的能力相仿。面对此类提问，系统会验证近期数据完整性，筛选合适指标，对比相关日期数据，结合个人基线值与群体统计数据解读结果，综合历史交互记录，最终生成定制化分析与建议。

其次，我们采用多智能体协作框架：包括（1）对话智能体负责多轮对话、意图识别、任务协调、语境构建与应答生成；（2）数据科学智能体通过工具调用实现数据获取、分析与摘要，必要时启动代码生成功能；（3）领域专家模块（如健身顾问）分析用户数据后生成个性化方案，并随进展动态调整。

最后，尽管基础模型能力卓越，仍需精细调校才能满足健康场景需求。我们根据大众健康需求设计评估体系，通过系统指令优化持续增强Gemini在健康辅助领域的核心能力。

三大技术突破共同铸就更精准、更实用的健康指导。

专家验证与用户迭代的关键作用
我们深知技术卓越仅是基础，可靠性与安全性才是核心：

我们首先将健康助手植根于科学验证的教练体系与健身框架。

同时采用以人为本的设计理念整合专家与用户反馈：

• 组建由权威学者构成的消费者健康咨询委员会，指导产品开发
• 汲取职业健身教练经验拓展运动科学基础，融入场景化解决方案
• 开创专家协作新模式，在健康管理的细微领域凝聚共识
• 通过大规模授权研究（如Fitbit健康洞察探索、睡眠与症状检测实验室）持续收集数千用户反馈

我们持续运用SHARP评估框架（安全性、实用性、准确性、相关性、个性化）进行多维验证。该体系已积累超100万条人工标注数据及逾10万小时的专业评估——涵盖运动医学、睡眠科学、全科医疗、心血管、内分泌、运动行为学等领域的专家与通才评估员。我们进一步引入自动评估系统扩展验证规模，确保健康建议的科学准确性。该框架还实时监测产品在实际场景中的表现，推动关键领域的持续优化。

参与共创，塑造您的健康助手
欢迎加入公开测试，通过应用内渠道或社区论坛分享宝贵意见。您的反馈将直接助力助手进化，让它更好地为您服务。

注：
公开测试资格可能随时调整，不另行通知。功能将分批上线，您的体验会随版本更新而变化。本产品非医疗设备，仅用于常规健康管理。如有健康问题请及时咨询专业医疗人员。

英文来源：

How we are building the personal health coach
October 27, 2025
Shwetak Patel, Distinguished Scientist & Health Technologies Lead, and Florence Thng, Health Intelligence PM Director, Google
The personal health coach is built with Gemini models to deliver personalized and adaptive coaching, grounded in science and informed by expert oversight.
Quick links
Historically, health and fitness journeys have been fragmented, generic and inaccessible, whether within existing apps or through general health and fitness journeys outside of apps. For instance, a primary care provider might suggest seeing a specialist or losing weight for better diabetes management, but often without providing connections to a nutritionist or fitness coach. This leaves users with the burden of connecting these dots themselves.
Our vision is to address this by offering a proactive, personalized and adaptive AI-powered personal health coach. This coach will seamlessly enable:

• Proactive insights on sleep, fitness and health
• Personalized guidance grounded in behavioral science, established health and wellness principles and individual health metrics, such as activity and other physiological data
• Personalized coaching to set goals and build sustainable habits through actionable, adaptive plans
  Starting tomorrow and over the next week, we are rolling out an optional public preview of the health coach for eligible US-based Fitbit Premium Android users and expanding to iOS users soon. Users who opt in to participate will be presented the consent to provide access to their Fitbit data to receive personalized insights.
  This innovation is powered by advances in Gemini models plus our new AI-first personal health coach experience on the Fitbit app, and our continuous progress in cutting-edge research across Fitbit, Google Research and Google DeepMind. Building from the ground up takes time and rigor, a commitment especially important for health and wellness. We are approaching this thoughtfully and iteratively, grounded in science, incorporating feedback from the scientific community and users. We will continue to be open about our work through publications and updates, and here we provide a quick peek into what went into building the personal health coach.
  Steering Gemini for health coaching
  “Do I get better sleep after exercising?” sounds like a simple question, but answering it like a proactive, personalized and adaptive coach required several technical innovations.
  First, we need the coach to understand and do numerical reasoning on physiological time series data such as sleep and activity, using capabilities similar to those showcased by PH-LLM. For questions like this, the coach verifies recent data availability, chooses the right metrics, contrasts relevant days, contextualizes results against personal baselines and population-level statistics, incorporates prior interactions with the coach, and finally uses the analysis to provide tailored answers and insights.
  Second, we utilize a multi-agent framework that coordinates expert sub-agents to provide clear, consistent and holistic support, such as (1) a conversational agent for multi-turn conversations, intent understanding, agent orchestration, context gathering and response generation; (2) a data science agent that iteratively uses tools to fetch, analyze, and summarize relevant data (e.g., sleep and workout data), leveraging code-generation capabilities as needed; and (3) a domain expert, such as a fitness expert that analyzes user data to generate personalized fitness plans and adapt them as progress and context change.
  Third, while foundational models are incredibly capable, careful steer is required for it to be useful in the health and wellness context. We developed evaluations based on consumer health and wellness needs to inform the system instructions and improve upon Gemini’s core capabilities in assisting our users.
  Working together, these innovations result in more personalized and beneficial guidance.
  The critical role of expert validation and iterative design with users
  We know that technical excellence alone isn’t enough, and reliability and safety are paramount.
  First, we grounded the coach in scientific and well established coaching and fitness frameworks.
  We also used human-centered design to integrate expert and user feedback including:
• Convening a Consumer Health Advisory Panel of leading experts to provide feedback and guidance for the development of the coach.
• Extending the sport science foundation with input with professional fitness coaches to incorporate context-specific approaches.
• Developing novel methods to collaborate with experts, fostering consensus in nuanced areas of personal health and wellness.
• Actively soliciting feedback from thousands of users in large-scale consented research studies (e.g., from Fitbit Insights Explorer, Sleep and Symptom Checker Labs).
  Finally, we continuously validate the personal health coach using dimensions of safety, helpfulness, accuracy, relevance, and personalization, collectively known as the SHARP evaluation framework. This multi-level assessment involves over 1 million human annotations and more than 100k hours of human evaluation by generalists and experts across various fields such as sports, sleep, family medicine, cardiology, endocrinology, exercise and behavioral science. This process is further extended and scaled with autoraters to ensure that wellness recommendations are scientifically accurate. The framework also incorporates the coach’s real-world performance, enabling ongoing improvements in the most critical areas.
  Help us build your coach
  Join the public preview and share your feedback in the app or through our community forum. You will help shape the coach, so it can do more for and with you.

• Public Preview eligibility criteria are subject to change without prior notice. Features will be added incrementally and on a rolling basis, so your experience may vary as new functionalities are introduced. Not a medical device. This product is intended for general wellness and fitness purposes only. Always consult a qualified healthcare professional for any health concerns.