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Iím an author and journalist in Toronto. My primary focus these days in the science of fitness and endurance, which I cover for Runnerís World (where I write the monthly Fast Lane column and the Sweat Science blog), The Globe and Mail (where I write the biweekly Jockology column), and Canadian Running magazine. I covered technology for Popular Mechanics for a decade, and write about adventure travel for the New York Times and other publications.

Alex Hutchinson in the Everest region.

My latest book, published in 2011, is Which Comes First, Cardio or Weights? Fitness Myths, Training Truths, and Other Surprising Discoveries from the Science of Exercise. In it, I delve into the scientific literature to find out exactly what researchers know (and donít know) about 111 common fitness questions. I also wrote Big Ideas: 100 Modern Inventions That Have Transformed Our World, which was published in 2009.

A few interests that turn up in my writing:

Science: Before becoming a journalist, I did a Ph.D. in physics at the University of Cambridge, then spent a few years as a postdoctoral researcher with the U.S. National Security Agency, working on quantum computing and nano-mechanics.

Sports: Between 1997 and 2008, I competed as a middle- and long-distance runner for the Canadian national team, at distances ranging from 1,500 metres to 12 kilometres. Iím still an endurance junkie: I enjoy training (and, occasionally, racing), as well as following the elite side of the sport.

Music: Iíve been playing jazz saxophone for more than 20 years now, but in the tradition of armchair critics everywhere, Iím a better student of the music than I am a player. I enjoyed covering jazz for the Ottawa Citizen from 2005 to 2009 Ė and Iím available for weddings and partiesÖ but my sax is getting pretty dusty, sadly.