Bone density lessens as people age. It can lead to osteoporosis: a progressive disease that weakens bones, often resulting in painful fractures.
In a study of 1,147 American women at least 60 years old, bone density dropped an average 4% in a decade. The average difference in bone density loss between those satisfied with their lives and those unsatisfied was 52%. In women who experienced deteriorating life satisfaction compared to those who were happy, bone density weakened by 85%.