How does this skill handle daily weight fluctuations?

The skill is programmed to treat single-day weigh-ins as noise, focusing instead on 14-30 day trend lines to provide an accurate interpretation of physical progress.

When should I use this skill instead of a general health query?

Use this skill for deep-dive analysis into body metrics; for general health questions or diet-specific inquiries, it automatically escalates to 'body-data-qa' or 'body-diet'.

Which hardware devices are compatible with this skill?

It is optimized for use with Withings smart scales for composition data and Garmin wearables for training context via their respective MCP servers.

Can this skill identify if I am gaining muscle while losing fat?

Yes, it specifically tracks recomposition patterns by comparing the direction of body fat percentage against muscle mass in kilograms over the same period.

Body Composition Specialist

Name: Body Composition Specialist
Author: Rachnog

byRachnog

•

분석 및 모니터링

Analyzes body composition metrics from Withings and Garmin to track muscle mass, fat percentage, and recomposition trends.

The Body Composition Specialist is a dedicated quantitative analysis skill designed to interpret physical health data from Withings scales and Garmin wearables. It moves beyond simple weight tracking by focusing on deep composition metrics like muscle mass, body fat percentage, and bone mass. By synthesizing 14-30 day trend lines and contextualizing them with Garmin training volume, the skill identifies whether weight changes represent true progress, stalls, or regressions. It is built to support long-term fitness goals by comparing real-time measurements against specific numerical targets while filtering out daily measurement noise.

주요 기능

01Automates comparison against 2026 numerical targets and defined body protocols.

02Synthesizes data from Withings (weight, fat, muscle) and Garmin (training load) MCP servers.

033 GitHub stars

04Provides structured output including current metrics, trend interpretation, and goal alignment.

05Calculates 14-30 day trend lines to prioritize long-term progress over daily fluctuations.

06Identifies complex recomposition patterns such as simultaneous fat loss and muscle gain.

사용 사례

01Validating real-time body measurements against personal strategic health targets.

02Conducting weekly or monthly health reviews to visualize body fat and muscle mass trajectory.

03Determining if a weight plateau is actually a positive recomposition event during a training cycle.

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add rachnog/alex-honchar-claude-for-life body-composition

For use in Claude.ai and ChatGPT

주요 기능

01Automates comparison against 2026 numerical targets and defined body protocols.

02Synthesizes data from Withings (weight, fat, muscle) and Garmin (training load) MCP servers.

033 GitHub stars

04Provides structured output including current metrics, trend interpretation, and goal alignment.

05Calculates 14-30 day trend lines to prioritize long-term progress over daily fluctuations.

06Identifies complex recomposition patterns such as simultaneous fat loss and muscle gain.

사용 사례

01Validating real-time body measurements against personal strategic health targets.

02Conducting weekly or monthly health reviews to visualize body fat and muscle mass trajectory.

03Determining if a weight plateau is actually a positive recomposition event during a training cycle.