Detail Faster, Higher, No Longer; Athletic Performance   Oleh:  [s.n] Jenis: Article from Bulletin/Magazine Dalam koleksi: The Economist (http://search.proquest.com/) vol. 404 no. 8796 (Aug. 2012), page 64. Topik: Athletes; Optimization; Olympic Games Ketersediaan Perpustakaan Pusat (Semanggi) Nomor Panggil: EE29.73 Non-tandon: 1 (dapat dipinjam: 0) Tandon: tidak ada     Lihat Detail Induk Isi artikel On August 5th millions of people will watch the 100-metre final at the London Olympics. Many will wonder if anyone can repeat Usain Bolt's feat in Berlin in 2009, when the Jamaican clocked 9.58 seconds, lopping 0.11 seconds--aeons in a sprint--off the previous world record, which he set at the 2008 Beijing games. One person who thinks this unlikely is Mark Denny. Another 0.11 seconds would take the time below what Dr Denny, from Stanford University, reckons is the absolute limit of human athletic performance in the 100-metre dash. Predicting the limits of human athletic prowess has been a popular parlour game among number crunchers. One study from 1992 had female marathon runners drawing level with men by 1998, to complete the 42.195km (26.2-mile) course in just under two hours and two minutes. (The current male record remains 1.5 minutes slower; for women it is 12 minutes slower still.) A more recent analysis from 2004 suggested that male and female 100-metre times will converge in 2156, at 8.08 seconds. Nowadays sport statisticians view such calculations as flawed because they relied on linear extrapolations. They prefer to fit data to variants of a "logistic" curve. This produces an S-shaped plot more in line with the intuition that performance starts off relatively flat. It then goes through a period of rapid improvement as more people take part and more systematic approaches to training and nutrition get more out of them. It finally levels off as athletes inch towards the most a body can manage. Opini Anda Klik untuk menuliskan opini Anda tentang koleksi ini! Kembali

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