Calligraphy, handwriting, drawing, painting etc etc you loose it if you don't work on it regularly.
Same goes for programming. Take a year or two off and see what your remember about algorithms and protocols.
Same goes for programming. Take a year or two off and see what your remember about algorithms and protocols.
And this is the main problem with algorithmic interviews. This type of programming has little to do with the stuff most of us do on a daily basis. So we forget much of it a year or two after our last interview, and have to go back and spend weeks or months reviewing when preparing to interview again. Seems like a waste of time.
Riding technical trails on a MTB. Without regular practice you lose a lot of pace.
Street or park BMX tricks (tail whips, flairs, flips, grinds etc). These require skill plus confidence. Without regular practice the confidence won't be there to attempt them.