No matter the number of injurious bumps in the road most guys endure as they age, the one common to most could be described by one of those diction choices that tether us to the past — for me, the same way I call a sofa a davenport, a fridge an ice box and a foot stool an ottoman. The word to which I’m referring is lumbago, once upon a time the catch-all term for lower-back pain. For many of us, it comes and goes.