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    A sprain occurs when a ligament stretches or tears. A strain is a stretch or tear in a muscle or tendon. Both injuries are painful and occur often at work or in sports. Follow the links below to find WebMD's comprehensive coverage about how sprains and strains are caused, symptoms of strains and sprains, treatments, prevention, and much more.

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    Thumbnail: Pull Your Thigh Muscle? Treatment Tips for a Quad Strain

    What it means to strain or tear your quadricep and how to get back in the game.

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    Heart Rate Calculator

    Ensure you're exercising hard enough to get a good workout, but not strain your heart.

    While you are exercising, you should count between...

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    Seconds

    Heart Rate Calculator

    Ensure you're exercising hard enough to get a good workout, but not strain your heart.

    While you are exercising, you should count between...

    -
    Beats
    PER
    Seconds