Jessica Ennis. These are the stomach muscles that makes half the nation take a long hard look at their exercise programmesPhotograph: Jason O'Brien/Action ImagesFellow heptathlon competitor Katarina Johnson-Thompson is as streamlined as EnnisPhotograph: Stu Forster/Getty ImagesA final gold for Michael Phelps in the pool – his 12,000-calorie a day diet won't have the same effect on everyone's physique Photograph: Clive Rose/Getty ImagesEthiopia's Tirunesh Dibaba Kenene grabs gold in the 10,000m final - will a workout video be next?Photograph: Olivier Morin/AFP/Getty ImagesMexico's Ivan Garcia and German Sanchez took silver in the 10m platform diving competitionPhotograph: Adam Pretty/Getty ImagesPlenty of stomach muscle definition in the heptathlon: here's Switzerland's Ellen Sprunger in the 200m heats Photograph: Olivier Morin/AFP/Getty ImagesFrance's Florent Manaudou celebrates after winning gold in the men's 50m freestyle - a Men's Health cover will surely followPhotograph: Matt Slocum/APBrazil's Juliana Silva, showing what she's made of in the beach volleyball Photograph: Marcelo Del Pozo/ReutersPeter Waterfield and Tom Daley came away from the synchronised diving without a medal but at least their six-packs are well matchedPhotograph: Steven Paston/Action Images
