Ultra-clean premium minimalist SVG body-mapping model for a modern iOS fitness UI. Style: Apple Health / iOS Fitness aesthetic, flat vector, smooth curves, symmetric anatomy, no exaggerated proportions, monochrome neutral base colors with optional soft gradients, premium app-dashboard look. Composition: two views—front and back of the body in neutral stance, centered on canvas with ample white space. For each major muscle group, provide a distinct SVG path with a dedicated unique id for dynamic interaction; front groups: chest, shoulders, biceps, forearms, abs, obliques, quadriceps, calves; back groups: traps, rear_delts, triceps, lats, lower_back, glutes, hamstrings, calves_back. Paths should be simplified abstractions, not medical or cartoonish, with consistent spacing and proportions; minimal node count and smooth editable curves; no thick outlines; responsive scaling for React Native SVG. Interaction-ready: clean structure, ready for muscle-activation heatmaps, weekly volume, fatigue overlays, and targeted visualization. Deliver as two SVG files named front_body.svg and back_body.svg.

The image shows a diagram of the human body with a black background. It is a visual representation of the anatomy of the body, providing a detailed look at the various muscles and structures that make up the body.