What causes muscle cramp?

Muscle cramp can be very painful, typically occurring in your legs or arms. If you’ve ever been for a really long jog, or pushed yourself a bit too hard in the gym, then you have probably felt this uncomfortable muscle spasm, but thankfully the pain doesn’t usually last for very long.

The science behind cramping is poorly understood due to limited research in the area, but the most widely accepted theory is that cramping happens when the muscle becomes over stimulated. Without a chance to relax, the muscle can’t return to its original size, causing the pain we know as cramp.

To find out more about why muscles cramp, watch our video complete with illustrations that show exactly how cramp occurs!

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  • Rockman Rock

    and cramps during sleep when the muscle isn’t over stimulated?

  • swathi kashyap

    When you exercise you are intaking more oxygen.When oxygen molecules come in contact with the skeletal muscles,they produce lactic acid.The oxidized result of lactic acid causes the muscle cramp.