'Heel-strike' may have allowed early humans to walk farther—at the cost of high-impact forces

The average person takes thousands of steps each day, instinctively walking heel-to-toe. Although they hardly register them, those consistent heel-first strides are more distinctive to humans than previously thought and allowed early hominins to walk farther and more efficiently, but at the cost of higher impact forces on bones and joints, according to a new study led by a researcher at Penn State.

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