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If typically British weather keeps you stuck inside the ‘van watching the Olympics this summer, then you might want to spend 69p on an iPhone and iPad app to help you make the most of the televisual extravaganza.

Curly’s Pocket Guide to Running, Jumping, Swimming… and Throwing Things is a fun reference guide that provides useful information about all manner of sporting events.

Presented as a series of playing cards for easy searching, the guide not only explains key rules for everything from archery to Taekwondo, but it’s full of interesting facts, too.

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So, if you’ve ever wondered why race walking looks so peculiar (the athlete’s back toe can’t leave the ground until the heel of the front foot has touched it, and the supporting leg must straighten from the point of contact with the ground and remain straightened until the body passes over it) or why the javelin world record will never be broken (the IAFF redesigned the javelin after a 104.8m throw in 1984 to make it harder to throw) then the aptly named Curly’s Pocket Guide to Running, Jumping, Swimming… and Throwing Things could be for you.

[Curly’s Pocket Guide]