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An interview with Benno Nigg, the sports scientist A. What kind of technology might we see in sports shoes of the future? B. What should people look out for when buying a new pair of sports shoes? C. Will a more expensive shoe make me run faster or jump higher, as the ads suggest? D. Is it true that expensive shoes are no better at preventing injury than cheap ones? E. Some people say we should run just as well without shoes. What's your opinion? F. You helped develop the unstable Masai MBT shoes. Does this design actually work? 1. _____      Nigg's Answer: That is a little bit overstated. But the literature shows that shoes are a minor player in injury development. If you take a group of people and want to injure them, send them out every day for a 20-kilometre run. A lot of them will be injured in three weeks. The major factors are the distance run, the intensity and recovery time, not the shoes. 2. _____      Nigg's Answer: The problem is that if you go to a store and want to find your best shoes, you don't know what to do. Things that are sometimes done, like video analysis of your rear foot movement, may not help. The only way to assess whether a shoe is right for you is how it feels. If you feel comfortable in a shoe, it's likely to be good for you. 3. _____      Nigg's Answer: A shoe may act as a training device, making some muscles to function more effectively for a majority of users. Or it may use materials that last longer. That may have something to do with its price. However, for the average runner it is difficult to distinguish between actual functional designs and unnecessary features. Generally, the more a shoe controls movement, the more it acts like a cast, which means you lose some muscle strength, and your feet are more likely to be injured. 4. _____      Nigg's Answer: Yes, for about 80 per cent of people. The major benefits are training the small muscles crossing the ankle joint, and a reduction of knee and lower back pain. However, some claims for these unstable shoes are overstated, such as the general muscle strengthening that they are claimed to produce. 5. _____      Nigg's Answer: There are claims that there are fewer injuries when you run barefoot, but there is not yet enough evidence, or enough research, to prove that. If you look at performance, most papers suggest an advantage of 3 to 4 per cent. With a few exceptions, people don't run barefoot, so it may be that it's not an advantage, or it may be that we're just not used to it.

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