What gives Tottenham Hotspur’s Gareth Bale, heptathlete Jessica Ennis and sprinter Usain Bolt that extra edge? How do genetics, psychology and technology combine to produce winners on track, field and beyond?

This month’s Eureka is a very special double edition – a 60 page magazine free with The Times tomorrow plus a digital exclusive - LIVE IN THE APP STORE NOW - a ground-breaking 300 page interactive iPad special edition available from the App Store for only 59p. A selection of Times writers are available for interview including national table tennis champion Matthew Syed, Eureka iPad app editor Murad Ahmed and science editor Mark Henderson.

ENGINEERING: Look at the technology that saved Felipe Massa from disaster at the 2009 Hungarian Grand Prix; Play with the electronic dashboard that is an F1 steering wheel; pull apart a Renault F1 car part by part; X-ray Team Sky’s professional racing bike, the Pinarello Dogma 60.1; sprint through all the winners of the Tour de France on our interactive wheel.

HUMAN PHYSIOLOGY: Why Kenyan endurance runners are the best in the world; coaching tips video from the Michael Johnson Performance Centre; the techniques of Jessica Ennis’s biomechanist; inside a hypoxic chamber.

BIOLOGY: Matthew Syed on the world of genetically-modified athletes; Times writer and former England cricketer Ed Smith on whether doping should be allowed.

PSYCHOLOGY: Former England cricket captain Mike Atherton on the science of swing bowling with accompanying video.

MEDICINE: Why women are more injury-prone than men, with comment from Team GB sprinter Jeanette Kwakye; interactive graphic of the real bionic man – how the quality of life for amputees has improved with advances in prosthetic engineering.

PLUS: Comedian and Eureka columnist Ben Miller on the sportsmen and women who deserve drugs; and Scott Drawer, Head of Research and Innovation at UK Sport, sits the Eureka Q&A.