Substantial and Long Term Adversity

I was filling out a job application form this week and came accross the disability and equal opportunities section. I normally tick the disabled box and then fill out the section about how I'm effected on auto pilot, but for some reason reading the description of disability really knocked me.
"The Disability Discrimination Act (DDA) defines a disabled person as someone who has a physical or mental impairment that has a substantial and long-term adverse effect on his or her ability to carry out normal day-to-day activities."

That sounds quite bad, hey? A substantial and long-term adverse effect on your ability to carry out normal day-to-day activities. A heavy sense of loss struck me, thinking about how much time, effort, energy, planning, stress and difficulty I've had doing things that other people do easily, automatically and often. And those are the achievments! Those are the times I've battled and fought and rested and planned and managed to do a small measure of what able bodied people do everyday. I know it doesn't sound like me, but I'm sort of lost for words.