This 11-year-old gained great wisdom from the seat of a wheelchair. His indomitable spirit and quick smile lift up all those he encounters.
Excessive sitting after 50 is tied to disability.
Feeling they have control over their chronic conditions helps, researchers say.
Middle-aged adults will lose more than 3 years because of the disease, study estimates.
'Because functional disability develops gradually, it is important to identify it early and take steps to delay decline...'
