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Your Body Has a 'Second Heart', And It's Crucial You Keep It Pumping

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Second heart sound 110bpm
Photo: A2569875 / Wikimedia Commons (CC BY-SA 3.0)

Researchers found that sustained contractions increased the muscle's energy use and helped the body process glucose and fats after eating. A subsequent pilot study involving just 10 people with prediabetes found that performing the movement throughout a two-hour glucose tolerance test reduced the rise in blood sugar by roughly one-third compared with sitting still.

They found that the less blood the calf pump expelled during movement, the higher the risk of death. Evidence suggests that an impaired calf pump may reveal something about a person's wider health.

A larger study from the same Mayo Clinic, published in 2024 , supported the connection.

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