Vintage physical culture plate from a 1920s training manual. Black and white halftone print on aged cream paper with light foxing and a faint plate impression. Single hard studio light from the upper left, deep controlled shadows, plain seamless mid-grey backdrop, no props other than those described. Photographic realism of the period, not illustration. Anatomically correct hands with five fingers and correct feet. Sharp focus on the working joint. Subject: A 38-year-old woman, 1.66 m, athletic and strong without being lean to the bone, dark hair pulled back in a low bun, calm neutral expression, wearing a plain dark sleeveless jersey top and knee-length dark shorts, barefoot or in plain canvas shoes. Pose: lying flat on her back on the floor, gymnastics hollow-body hold. Her entire body stays LOW and close to the floor: only her shoulder blades and head are lifted a few centimeters off the ground, her legs are straight and lifted only about 15-20 centimeters off the floor (low, near-horizontal, NOT raised toward the ceiling), her arms are extended straight overhead beside her ears also a few centimeters off the floor, her lower back is pressed flat into the floor with no arch, and her whole body forms one long, shallow, banana-shaped curve from fingertips to toes, like a rigid dish. This is NOT a V-sit, NOT a toe touch, NOT a candlestick or shoulder stand: her legs never point toward the ceiling, her hips stay on or just above the floor, and she is not curled forward reaching for her feet. Full body in frame with a hand's width of margin on every side, side view (profile), eye-level camera positioned low near floor level, 50mm lens look, vertical 3:4 composition, no text, no numbers, no captions, no watermark.