Elite biomechanics labs require $50k in hardware.
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Our on-device engine doesn't just "guess" your posture. It solves 3D projective geometry in 12ms per frame, pinpointing inefficiencies before they become injuries.
Rotation Invariance • L2 Norm
const calculation = (u, v) => {
// Normalize vectors in 3D projective space
const dot_p = vec3.dot(u, v);
const angles = Math.acos(dot_p / (vec3.len(u) * vec3.len(v)));
// Return rotational invariant stability score
return (angles * 180 / Math.PI).toFixed(2);
}
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Identify chronic stress patterns in your gait before they become sidelined seasons. Move longer, move better.
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Our joint-angle modeling and real-time inference methods have been recognized for their technical depth by academic leads at the BYU Data-Driven Engineering Lab.
# 3D Vector Dot Product — Joint Angle Calculation
# θ = arccos( (u · v) / (|u| × |v|) )
import numpy as np
def joint_angle(a: np.ndarray, b: np.ndarray, c: np.ndarray) -> float:
"""Compute the angle (degrees) at joint B between limb segments BA and BC."""
u = a - b # vector B → A
v = c - b # vector B → C
cos_theta = np.dot(u, v) / (np.linalg.norm(u) * np.linalg.norm(v))
return np.degrees(np.arccos(np.clip(cos_theta, -1.0, 1.0)))
Institutional validation
Proactive Biomechanics Lab • Grand Blanc, Michigan © 2026