Cẳng chân càng ngắn chạy càng nhanh
hững người có ngón chân dài và cẳng chân ngắn có nhiều cơ hội trở thành vận động viên điền kinh. Tiến sĩ Stephen Piazza, một chuyên gia về chuyển động của con người tại Đại học Pennsylvania (Mỹ) dành nhiều thời gian để nghiên cứu chân của các vận động viên điền kinh. Ông và cộng sự tuyển 10 người có cùng chiều cao và cân nặng với 10 vận động viên chạy nước rút của trường.
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4bqgw612w4PhurzDrXJ34bub4bqgw61y4buCw7PDreG7iuG7n+G6oMOtdOG6pOG6oHbDreG7injFqeG6oMOtdHjhu6nhuqDDrUF44bqgd8Ot4bqgduG7k+G6oMOtd+G6qOG6oMOt4bqgdkZCeMOt4bq8d0ZC4bqgdsOtQXfhuqLDteG6oHbDreG7iWtj4bq9w60zd3XhuqLDrcSD4bqgdcSoReG6uHXhurrhuro=