The fitness industry has an entirely separate type of January effect that sees a spike in sales of home exercise equipment, diet programs and gym memberships.

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The QVC cable shopping channel, watched in more than 98 million households in the USA alone, sells everything from food to exercise equipment, from fine jewelry to home electronics.

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In 2011, the past year for which data is available, treadmill injuries in any context (home, office or gym) comprised 37% of all exercise-equipment mishaps, which numbered nearly 62, 000, a Wall Street Journal analysis of the database found.

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