The purpose of this study is to compare three different treatments for these types of lower extremity apophysitis- Osgood-Schlatter syndrome (OSS), Sinding-Larsen and Johansson syndrome (SLJ), or Sever's disease. The investigators hypothesize that adolescents who perform a home exercise program (HEP) consisting of active elongation exercises will have decreased pain and earlier return to sports and activities as compared to those who perform a HEP that consists of static stretching exercises or those who use symptomatic treatment with ice, acetaminophen or NSAIDs and activity modification.
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Change in pain rating of a 5 point Likert type pain scale
Timeframe: 8 weeks