You know you're slowing down when:
You buy canes and walking sticks in different colours to accessorize.
Features like "non-slip" and "easy-open" catch your eye.
Your heavy workout is an easy stair climb for a two year old.
Young folks in their fifties hold doors for you.
Your nap counts as an activity of daily living.
You check out the guy on the scooter and comment "Nice wheels!"