Yes, yes, yes. :) Exercise makes you stronger in all aspects of health, especially physical health. I used to have a horrible back because of poor core muscles, but after planks, sit-ups, and leg lifts, I no longer have back pain. I think sit-ups get a horrible rep these days. "Don't do sit-ups! They'll eff up your back and neck!" That's any exercise done improperly, though. I attribute sit-ups to building me a strong core.