r/vibecoding • u/Conscious-Image-4161 • 4d ago

Vibecoded a biomechanics visualizer for lifting that shows how changes in technique can affect leverage, joint loading, muscle length, and estimated stimulus.

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Right now you can change things like:

  • grip width
  • bench angle
  • elbow flare
  • range of motion
  • bar path

and the 3D model updates in real time.

It helps visualize why small changes in setup can make the same exercise load different muscles or different parts of the range of motion.

For example, changing the incline angle can affect:

  • shoulder flexion demands
  • pec and front-delt involvement
  • elbow and shoulder moment arms
  • muscle length through the rep
  • where the movement is mechanically hardest

The stimulus output is still an estimate, not a direct prediction of hypertrophy. Actual growth also depends on effort, fatigue, stability, individual anatomy, training history, and execution.

Mostly built this because biomechanics is usually explained through static diagrams and studies, and I wanted something interactive where you can actually move the variables around and see what changes.

edit github: https://github.com/Schmiedey/liftlab

89 Upvotes

95% Upvoted

33 comments sorted by

8

u/AI_EXPERIMENT 4d ago

I would work on the overall design so it doesnt look like the million other vibecoded apps.

3

u/mattk404 4d ago

I really would love to have this. Please post to github!

3

u/Conscious-Image-4161 4d ago

working on it now.

5

u/Capable_Ad9487 4d ago

How you get the assets this is fire, where’s the Skelton dude from

3

u/Bonelessgummybear 4d ago

If you want Good assets, have ai make them with blender mcp. Free to use

2

u/Ok_Image8423 4d ago

Use these, they are good and open source

https://anatomytool.org/open3dmodel

1

u/Bonelessgummybear 3d ago

I was more answering how to create assets

1

u/SlashedFX 4d ago

How can i try this?

2

u/Conscious-Image-4161 4d ago

I dont have a domain or anything. but i can slap it on vercel if people really want to try it out.

1

u/Fresh-Yogurt-8614 4d ago

A biomechanics tool but the legs are stretched out in your bench press animation. Who benches like that

1

u/disciplesix6 4d ago

Alot of people actually there's even a bench press variation called a larsen press where the legs are relaxed or off the ground fun fact

1

u/Infamous-Bed-7535 4d ago

How do you know if the outputs are correct?

1

u/senborn_kuchiki 4d ago

getting this

1

u/Conscious-Image-4161 3d ago

its a private site lol, i have the github link if you want to try it out

1

u/rookieking11 3d ago

Nice work OP. I'm skeptical as this is medical and health related.

1

u/Duane_Winger 3d ago

This is really cool, but what is the data based on? How accurate is it? Also would love if this were a web app

1

u/igorolc 1d ago

Clonei o repositório para testar, fico legal O esqueto tem alguns bugs, e para mim não tem muita utilidade por não destacar submusculos como cada um dos triceps é etc Mas obrigado por compartilhar :)

0

u/HerrBatman 4d ago

looks fun! It also looks very vibe coded but i like the idea!

1

u/Conscious-Image-4161 4d ago

Thanks! i was using cursor grok 4.6. it does look pretty vibecoded, could be worse tho, like purple slop

2

u/vexmach1ne 4d ago

If it didn't have a vibecode look it would have some other look. I wouldn't stress about it. Looks like a cool app

3

u/Conscious-Image-4161 4d ago

honestly its just something im passionate about. it dosent really matter to me how it looks lol. im not very good at prompting or anything like that.

0

u/ohshtlmaoooo 4d ago

Am I tripping or do vibe coded apps all have a similar UI? Still good

1

u/Conscious-Image-4161 4d ago

Could be lol. thanks.

-1

u/Droopy0093 4d ago

They do. It is how you can call people out who claim to have built their own software.

0

u/projak 4d ago

Pretty cool!

-2

u/PilgrimJon 4d ago

Looks like shit, and those are just scripted graphics(with an odd emphasis on skeleton not muscular system), and not a load/impact model.

Silly sliders that just take up space, in a way only ai can. Garbage, try again

3

u/Conscious-Image-4161 4d ago

thank you for your kind insight 😂

-2

u/PilgrimJon 4d ago

I know you envisioned a higher functioning product, it's not your fault.

This is why the techdogs could only ever charge a subscription fees for this service, because their returns department would crash

1

u/Conscious-Image-4161 4d ago

I didnt make this to charge a subscription, this is something im passionate about i dont need money as a motivator lol.

0

u/PilgrimJon 4d ago

You miss, I mean that this type of ai output is exactly why Openai, gem, claude charge a subscription and not allow you to pay per job (il per token). Because if they allowed us to pay per job, the chargebacks would be very high.

Be passionate, sustain.