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Given an abstract, indicate which of the provided candidate titles (Option1 and Option2) best describes it (respond with the text of the title, not option1/2).

Abstract: In a prospective study, 24 high school football players with isolated Grade III injuries of the medial collateral ligament (MCL) of the knee were treated by conservative management. This included an active rehabilitation program, progressing from immobilization and controlled motion in an orthotic rehabilitation knee brace, to muscle strengthening and agility exercise. A stable knee was achieved in 22 cases; the average recovery time was 29 days. The athletes returned to competitive sports at a mean time of 34 days. These results confirm previous reports of successful nonoperative management of isolated Grade III MCL injuries.
Which is the apt title for the abstract? option1: Nonoperative management of isolated grade III collateral ligament injury in high school football players. option2: Phorbol ester serves as a coepibolin in the spreading of primary guinea pig epidermal cells.
Output:
Nonoperative management of isolated grade III collateral ligament injury in high school football players.