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专题05 阅读理解(说明文) 1. 2024届广东省四校高三第一次联考试题 2. 广东省河源市2023-2024学年高三开学联考 3. 广东省六校2023-2024学年高三联考试题 4. 广东省深圳市多校学校2023-2024学年高三联考 5. 广东省执信中学2023-2024学年高三开学试题 6. 广东省江门市新会一中2023-2024学年高三8月试题 7. 广东省湛江市第一中学2023-2024学年高三试题 8. 广东省广州市第二中学等6校2023年高三试题 9. 广东省新会陈经纶中学2023年高三模拟试题 10.2023年广东省华南师范大学附属中学预测试题 11. 2023年广东省汕头市金山中学高三试题 12. 广东省广东实验中学2022年高三试题 1.【2024届广东省四校高三第一次联考试题】 Race walking shares many fitness benefits with running, research shows, while most likely contributing to fewer injuries. It does, however, have its own problem. Race walkers are conditioned athletes. The longest track and field event at the Summer Olympics is the 50-kilometer race walk, which is about five miles longer than the marathon. But the sport’s rules require that a race walker’s knees stay straight through most of the leg swing and one foot remain in contact with the ground at all times. It’s this strange form that makes race walking such an attractive activity, however, says Jaclyn Norberg, an assistant professor of exercise science at Salem State University in Salem, Mass. Like running, race walking is physically demanding, she says. According to most calculations, race walkers moving at a pace of six miles per hour would burn about 800 calories per hour, which is approximately twice as many as they would burn walking, although fewer than running, which would probably burn about 1,0000 or more calories per hour. However, race walking does not pound the body as much as running does, Dr. Norberg says. According to her research, runners hit the ground with as much as four times their body weight per step, while race walkers, who do not leave the ground, create only about 1.4 times their body weight with each step. As a result, she says, some of the injuries associated with running, such as runner’s knee, are uncommon among race walkers. But the sport’s strange form does place considerable stress on the ankles and hips, so people with a history of such injuries might want to be cautious in adopting the sport