Definition of principal for English Language Learners. : 1  the person in charge of a public school. : 2  the person in charge of a university or college. : 3  an amount of money that is put in a bank or lent to someone and that can earn interest.
A quadriceps contusion is one of the more common injuries seen in athletes competing in contact sports and results from a direct blow to the front of the thigh.This type of injury often goes undertreated and may result in serious complications for the athlete.ecause of the location of the quadriceps, they can be subject to direct blows during sports competition. A deep quadriceps contusion can be one of the most disabling injuries for an athlete because injury to these muscles can severely impact an athleteâs ability to effectively use his/her leg.
The quadriceps muscles are the muscles on the front of the thigh. They consist of the vastus lateralis, vastus medialis, vastus intermedius and the rectus femoris. A strain is a tear in the muscle. These can range in severity, from a very small tear to a complete rupture. Tears to the quadriceps muscles usually occur following an activity such as sprinting, jumping or kicking, especially if a thorough warm-up hasn't been undertaken.