Shore duty means more time with your family, sure, but it can also mean more time on your rear end. Health researchers have been publishing study after study lately on the health dangers of sitting at a desk all day, but fear not! There’s a workout you can do while you’re answering emails — and it’s 51 years old. All Hands magazine published a nine-step fitness routine for sailors to complete at their desk, which is demonstrated in illustrations by a recruit, apprentice, seaman, petty officer 1st class, petty officer 2nd class and a master chief. Hat tip to TIME magazine, which used…