Photo: Rex Features/AP Photo
Now adults don’t have to feel awkward about joining in the fun at the playground. This gym at Shaw Park in Hull, England, installed by the Great Outdoor Gym Company, includes a standard fitness bike, a recumbent bike, a bike that’s pedaled by hand, and a cross-training station. Best of all, it’s usable 24/7 because the equipment harnesses the energy that users exert and converts it to electricity to light up the gym at night.












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Willie Jones
Willie Jones is an associate editor at IEEE Spectrum. In addition to editing and planning daily coverage, he manages several of Spectrum's newsletters and contributes regularly to the monthly Big Picture section that appears in the print edition.
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