Researchers simulated the running ability of the 3.2-million-year-old Australopithecus afarensis, revealing that while Lucy could run, she was not well adapted for it.
Lucy could reach a top speed of 4.97 meters per second, significantly slower than modern humans' average of 7.9 meters per second and Usain Bolt's world record.
The study suggests that Lucy expended 2.9 times more energy running compared to modern humans, indicating less efficiency in their running capabilities.
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