I could still change a tire,but due to back surgery,have been warned not to try it.
I have AAA Plus,but in a pinch I could change a tire if I had to.
I do have a gripe with those power tools, that put the lugs on. Not sure I have the strength to take them off when they use them.
Run down to your local auto parts store and pick up a "Gorilla Wrench." It has an extendable handle that will give you enough leverage to easily remove the tightest lug nuts, yet collapses into a size easily stored alongside your jack in whatever cubby hole your car provides for that purpose.
I have one in every vehicle.
http://www.harborfreight.com/12-volt-1-2-half-inch-emergency-impact-wrench-92349.html