I made a free tool for PTs/PT Students
I built Myosight a free interactive site for learning how muscles work during movement.
What it does:
- Try it: drag a body through 10 setups (curls, squats, leg raises, knee extensions and more) and watch the working muscle and its contraction update live. Compare two setups side by side and share any position as a link.
- Analyze: step through 8 exercises frame by frame, with every joint explained.
-Practice: 10 quick questions on motion, gravity, muscle group and contraction type, with the reasoning after each and a summary of your error patterns.
- Lessons: three short interactive lessons on joints, gravity and concentric, eccentric and isometric actions.
-Research: pick a muscle on a body map for plain summaries of key studies, plus the newest studies pulled live from PubMed and 16 sports science journals.
Why I made it: the direction a joint moves doesn't tell you which muscle is working. Gravity does. A squat and a lying hamstring curl bend the knee the same way, yet opposite muscles do the work. That idea trips up a lot of students, and flashcards rarely make it click, so I wanted something you could actually see and move.
It's free, works on your phone, no account needed, nothing to buy. It models movement from the side and estimates net joint demand, so it's a learning aid, not a clinical tool.
Honest feedback is welcome: is anything inaccurate, and would this have helped you study?