The reason is still a mystery, although researchers in Canada documented the phenomenon last year. The science journal Nature reports that warm spring winds increased the number of headaches in almost half the 75 migraine sufferers who were studied. The elderly were particularly affected.

There are a number of dietary triggers for migraines including: alcohol (especially red wine), foods with monosodium glutamate (MSG), foods that contain tyramine (such as aged cheeses) and preserved meats with nitrates and nitrites.

Too much or too little sleep can trigger a migraine attack as well as emotional stress or response to life's daily pressure.

Here are some tips for preventing headaches and migraines associated with exercising in warm weather:

• Warm up adequately before exercise
• Maintain hydration throughout activity and after
• Consult your health-care provider about your exercise regimen

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