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BODYSIM by Well Principled

Gain Muscle and Shed Fat with a Digital Twin of Your Body

Gain muscle and shed fat with a digital twin of your body. BODYSIM is an app-based simulation of your body and its potential that recommends nutrition and exercise to meet your goals. Use BODYSIM to (1) Assemble your data from food logging, BIA weigh-ins, DEXA scans, at-home blood tests, and wearables, (2) Learn to “triangulate the truth” of your unique metabolism and physiology, and (3) Adjust your nutrition and exercise plans by simulating what will happen to your body. One founder put on 45 lbs muscle, and another put on 25 lbs of muscle while losing 50 lbs of fat. Our alpha testers lost an average of 12.6 pounds in 3 months. Our core technology distills messy academic literature into simulations. Before turning to our own fitness journeys, we successfully deployed sophisticated enterprise models of plant-soil-atmosphere, consumer behavior and battery electrochemistry. With BODYSIM we built a science-based simulation of macronutrient balance and muscle hypertrophy. It includes cell turnover, oxidation for energy, lipolysis of fat stores, synthesis of new muscle, glycogen resynthesis, GI latency, and even ketones. Get jacked at BODYSIM.com
BODYSIM by Well Principled
Founded:2018
Team Size:10
Status:
Active
Location:St. Louis, MO
Active Founders

Ryan Richt, Founder

Ryan has galvanized teams with bold vision and disruptive, patented innovations since 2003. Ryan transformed distributed analytics across an academic lab, his first bootstrap startup and computational biology and cloud teams at Monsanto. He grew VC-backed CiBO from 7 to 70 engineers and data scientists. Ryan holds an MBA and BA prob/stats from Olin and WashU.

Christopher Shafer, Founder

Chronically the first customer-facing engineer, Chris has delighted customers with deep-data applications from corn germplasm catalogs to global satellite data and environment simulations. Marshalling his broad expertise from cloud architecture to data visualization, Chris delivers outcomes customers love and leads solutions teams to productize them.

Joseph Wingbermuehle, Founder

Joe has spent 15 years building foundational platforms, from middleware at AT&T, to startups across FPGA-accelerated high-frequency trading, accelerated ETL, machine learning based network security (acquired by Cisco) and hybrid AI/physical models of global-scale crop simulation. Joe holds a BS in Applied Math and a PhD in Computer Science from WashU.
Joseph Wingbermuehle
Joseph Wingbermuehle
BODYSIM by Well Principled
Company Launches
BODYSIM: Gain muscle and shed fat with a digital twin of your body
See original launch post ›

We're excited to announce a complete overhaul of BODYSIM from a tracking and modeling tool for your metabolism into an end-to-end fitness forecasting system. After launching our initial beta last fall, we discovered something crucial: our users didn't just need another tracking tool with cool graphs, they needed a complete solution that bridges the gap between goals and real results.

The Challenge of Getting Results is Still Valid

If you've ever tried to build muscle and lose fat, you know the frustration:

  • Conflicting advice from countless "experts" and unreliable information
  • Scattered data across different apps and devices, each telling a different story
  • The exhausting task of turning abstract targets into actual meals and workouts

The (new) BODYSIM Solution: Building Your Digital Twin

At BODYSIM's core is our advanced "digital twin" technology, combining sensor fusion with the science of metabolism and physiology to help you understand your true potential, using:

  • DEXA scans
  • BIA weigh-ins
  • 3D body scans
  • Fitness tracker data
  • Resistance training
  • Macro-tracking
  • Blood panel biomarkers

This comprehensive data integration unlocks hidden insights about your metabolism, including your Basal Metabolic Rate (BMR), Total Daily Energy Expenditure (TDEE), hormone balance, and body composition changes.

What's New: Tools are Not Enough - Get Our Users Outcomes

1. Prescriptive Meal Plans: Chef-Created Meal Plans & Virtual Meal Kits

  • Library of high-protein, low-fat recipes with step-by-step instructions to make eating for transformation easy
  • Customizable weekly meal plans based on your preferences and goals
  • Direct integration with Walmart and Amazon delivery: order your entire meal plan with a few clicks
  • Simplified food logging with grouping, automated recipe creation, and easy to repeat meals

2. Prescriptive Workouts: Comprehensive Workout System

  • 2,200+ exercises with detailed videos and instructions
  • Intelligent weekly split recommendations
  • Progressive overload tracking to optimize muscle gain
  • 3D scan integration to track individual muscle group progress

3. Fitness Forecasting: Advanced Integration Features

  • Scenario planning to understand how to achieve goals faster
  • Muscle group modeling that maps exercises to specific body measurements
  • Blood marker sub-models that connect nutrition choices to health outcomes with quantitative recommendations to make a change
  • Overtraining Syndrome (OTS) risk monitoring



Why Trust Us

This is what we do; our core tech distills messy academic literature into simulations. We've deployed science-based models of consumer behavior and battery electrochemistry to enterprise. We built BODYSIM to guide our own fitness journeys. It worked. I put on 45 lbs of muscle, and my co-founder put on 25 lbs of muscle while losing 50 lbs of fat.

And it worked in our alpha test (ages 29-69, 50% female). 8 alpha testers lost an average of 12.6 pounds in 3 months, and 4 alpha testers with a maintain goal changed <1.4 pounds in 3 months.

We then had some beta amazing beta tester results: one lost 40 lbs, another gained 12 lbs of muscle, a female user gained 8 lbs muscle, a co-founder gained 10 lbs of muscle, and more.

The Complete Package

Your BODYSIM subscription includes:

  • Quarterly DEXA scans
  • Withings Body Scan scale
  • Monthly at-home blood tests
  • Escali food scale for precise tracking
  • Daily body composition updates
  • Live signals like Resistance Training Intensity to adaptively steer to your goals
  • Personalized exercise and nutrition recommendations

Join Us

Join us in revolutionizing how people transform their bodies. With BODYSIM, you're not just getting another fitness app - you're getting a science-based, personalized system that guides you from where you are to where you want to be.

Ready to transform your body with confidence? Visit bodysim.com today.

YC Sign Photo

Company photo
Selected answers from BODYSIM by Well Principled's original YC application for the S19 Batch

What is your company going to make? Please describe your product and what it does or will do.

We build software products that allow enterprises to optimize their foundational strategic and operational business processes, like pricing, demand planning, new product launch and R&D investment. We combine state-of-the-art AI with best-practice decision optimization models mined from the academic business literature to close the gap between best-practice and actual practice. Our technology bridges each stage of this practice gap by helping companies (1) harmonize their data centrally with our cloud and ETL automation, (2) learn the structural drivers of their business outcomes with our data science automation and (3) deploy optimized decision models that orchestrate the business with our customized-application automation.

YC S19 Demo Day Video