A man lifts a kettle weight in a gym
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Could you handle high-intensity interval training?

Gyms around the world tend to fill up in January as people try to make good on their New Year's resolution to get into shape.

Although it has been around for a while, high-intensity interval training could be one of this year's biggest fitness trends.

Some fitness trainers claim it offers the biggest results in the shortest time.

Dena Tahmasebi reports.

  • 20 Jan 2014
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