This 1989 two-page Reebok ad, "The Physics Behind the Physiques," was carefully removed from a magazine, so the image may not line up exact across the spread. Athletic models pose in leotards and a sports bra against a black-and-white studio backdrop overlaid with physics equations, with a significant amount of bare skin and toned legs on display to sell the new Energy Return System aerobic shoe technology.

• Two-page spread carefully removed from a period fitness magazine
• Athletic poses show a good amount of exposed skin and toned legs
• Physics equation graphics overlaid on the black-and-white studio photography
• Detailed copy explaining the new Energy Return System shoe technology
• A striking find for Reebok, fitness, or athletic apparel ad collections
• Measure approximately 8 x 11 inches per page