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Excess exercise 'hurts the heart' and cause dangerous long-term harm, say scientists | Mail Online

Excess exercise 'hurts the heart' and cause dangerous long-term harm, say scientists

Extreme exercise such as marathons may permanently damage the heart and trigger rhythm abnormalities, warn researchers.

They say the safe ‘upper limit’ for heart health is a maximum of an hour a day - after which there is little benefit to the individual.

A review of research evidence by US physicians says intensive training schedules and extreme endurance competitions can cause long-term harm to people’s hearts.