What causes cramp when cycling? The theories and fallacies behind the pain

We go in search of the causes - and possible treatments - for that lightening bolt of pain which seemingly comes always at the worst moment on a bike ride

Male cyclist riding his bike outside on a country lane
(Image credit: Future)

Most cyclists have been there at some point: it's a tough ride - long, hilly, fast, hot, or all four. You’re keeping pressure on the pedals at a constant rate and then a spasm like an electric shock tears through your calf, hamstring or quad.

Muscle cramps are common, though they affect individuals to varying degrees and there are a number of theories as to the cause.

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