The Harvard School of Public Health in Boston has found that a positive outlook on life can actually protect your heart from cardiovascular disease.

In this comprehensive review of over 200 studies of various forms of well-being and cardiovascular health outcomes, Harvard researchers Julia Boehm and Laura Kubzansky discovered that certain psychological traits—optimism, positive emotions and a sense of meaning—offer measurable protection against heart attacks and strokes. These characteristics have been found to slow the progression of cardiovascular disease as well.