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  2. Delayed onset muscle soreness - Wikipedia

    en.wikipedia.org/wiki/Delayed_onset_muscle_soreness

    Delayed onset muscle soreness (DOMS) is the pain and stiffness felt in muscles after unaccustomed or strenuous exercise. The soreness is felt most strongly 24 to 72 hours after the exercise. [1] [2]: 63 It is thought to be caused by eccentric (lengthening) exercise, which causes small-scale damage (microtrauma) to the muscle fibers. After such ...

  3. Spasticity - Wikipedia

    en.wikipedia.org/wiki/Spasticity

    The cause of spasticity is thought to be where an imbalance occurs in the excitatory and inhibitory input to α motor neurons caused by damage to the spinal cord and/or central nervous system. The damage causes a change in the balance of signals between the nervous system and the muscles, leading to increased excitability in muscles.

  4. Stiff-person syndrome - Wikipedia

    en.wikipedia.org/wiki/Stiff-person_syndrome

    Muscle stiffness and contraction can cause abnormal resting postures. Around 70% of those with SPS have the "classic" form of the disease. [5] People with classic SPS typically first experience intermittent tightness or aching in the muscles of the trunk. [6] These muscles repeatedly and involuntarily contract, causing them to grow and rigidify ...

  5. Hurting all over? Here are 10 Common Causes of Body ... - AOL

    www.aol.com/lifestyle/hurting-over-10-common...

    That muscle soreness, specifically the delayed-onset muscle soreness (DOMS) you feel a day or two after a hard workout, is the result of small tears in your tissues, according to a study published ...

  6. How to Prevent and Treat Painful Muscle Knots in Your Back - AOL

    www.aol.com/prevent-treat-painful-muscle-knots...

    What causes muscle knots? Muscle knots typically arise from over-exertion, stress put on the area for a long time, or repetitive motions. ... The number-one rule for sidestepping muscle tightness ...

  7. I'm a physical therapist. Here are 5 common myths about 'good ...

    www.aol.com/news/im-physical-therapist-5-common...

    And if you try to push through without them, chronic bad posture can cause muscle tightness and weakness as your body works to accommodate sitting in that unsupported position for an extended ...

  8. Benign fasciculation syndrome - Wikipedia

    en.wikipedia.org/wiki/Benign_fasciculation_syndrome

    Muscle stiffness may also be present; if muscle weakness is not also present, and cramps are more severe, the stiffness may be categorized instead as cramp fasciculation syndrome. [3] Cramp fasciculation is a variant of BFS which presents with muscle pain and exercise intolerance. [2] [4]

  9. What actually is muscle tightness? - AOL

    www.aol.com/news/actually-muscle-tightness...

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