Specifically, people who got plenty of physical activity and had a normal BMI had
fewer plaque deposits and tangles than those who got less exercise and had higher BMIs.
More than 40 illnesses known as amyloid diseases — Alzheimer's, Parkinson's and rheumatoid arthritis are a
few — are linked to the buildup of proteins after they have transformed from their normally folded, biologically active forms to abnormally folded, grouped
deposits called fibrils or
plaques.