This single-file application is engineered to meet all your specifications: responsive design, no external storage, no branding, premium SaaS aesthetics, and high-performance Vanilla JS. ```html Free Pilates Reformer Footbar Angle & Knee Stress Calculator

Reformer Knee Stress Calculator

Biomechanics guidance for Pilates footbar positioning

Measurement Inputs

User Height

Inseam (Leg Length)

Experience Level

Footbar Position (1 = Closest)

1 3 5

Biomechanical Feedback

Optimal Load

Optimal Setting

Your current setup provides a safe range of motion for your leg length.

Measurement Inputs

Biomechanical Feedback

Optimal Setting

Safety Disclaimer