New study shows you run faster and more efficiently when your calf muscles are strong, and your Achilles tendons are springy ...

But the new name, Achilles – after the ancient Greek warrior who chose eternal glory through war over a long, peaceful life – is simply a better one, with a famous Royal Navy history.

Patroclus returns to the battle wearing Achilles's armour but Hector spots him in the fray and the young warrior freezes ... He drags Hector's body back to the Greek lines and does not return ...