- Exclusion criteria are history of coronary heart disease (history of myocardial infarction or symptoms of angina), diabetes, stroke, osteoarthritis, osteoporosis, orthopedic problems, or any other serious medical condition that would make physical activity unsafe. Other exclusion criteria will include individuals who report consuming three or more alcoholic drinks per day, current or planned pregnancy, planning to move from the area within the next six months, current suicidal ideation or psychosis, current clinical depression, hospitalization due to a psychiatric disorder in the past 3 years, BMI above 40, and/or taking medication that may impair physical activity tolerance or performance (e.g., beta blockers). Participants in the pilot study must also agree to be assigned to one of the two intervention conditions.