There's a huge problem with working out that has yet to be solved: when, precisely, do our workout clothes become too worn to wear anymore? Apple knows we can't be wasting endless minutes looking for holes and tears in our shirts and pants, so it's just obtained a method patent to let you know when your gear is past its prime. The patent claims sensor-equipped garments that can track how you use them, report that info back to a central database and alert you when the clothing has reached "its expected useful lifetime." (Read: it's time to buy some new, undoubtedly more expensive gym clothes.) This latest bit of IP doesn't just cover clothing either, Cupertino's claiming the same method for running shoes, too. The footwear bit also provides real-time feedback that compares your current running style to an established profile to keep your workouts consistent -- useful feature, that, though we can't imagine such iShoes would make the folks in Niketown too happy. We're not sure how Apple aims to make the needed wearables equipped with embedded electronics, but we can offer you plenty of typically broad patent legalese explaining the system that'll get you buying them at the source below.