Amber Lynn's Personal Best (1986)

Amber Lynn is hot to trot in this racy, raunchy marathon of cross-country runners competing for honors and each other's awesome bodies. She's off at the first sight of a bosom buddy. Until she gets coached by some huge athletic supporters to be wide open for a more penetrating kind of action. Paving the way is Mr. Nude Universe, Justin Cooper, and his back-up men, who come on strong from the inside for a winning streak.