Bell Fellow Hayami Koga, along with Harvard Pop Center faculty members David Williams and Laura Kubzansky and their colleagues, have published a study in JAMA Psychiatry on the association between optimism and physical functioning among older women finding higher levels of optimism to be linked with better performance at baseline (grip strength and standing mobility) and slower rates of decline in several measures over a six-year period. Read about their findings in Newsweek and in this Harvard Chan School news post.