Physical activity is a leading determinant of health and well-being in older adults; however, participation is low. Social support can significantly influence physical activity uptake and maintenance; however, most research is cross-sectional and does not differentiate among types of support. The current study assessed four types of social support for physical activity reported over 9 years by adults aged 60-65 at baseline (n = 1,984). Data were collected using a mail survey at four time points. Data were analyzed using linear mixed models. The most common type of support was emotional, with 25% of participants reporting this often/very often. Total support for activity declined by 16% across the 9 years (p < .001). Companionship had the greatest decline among types (17%-18%, p < .001). More work is needed to understand the factors contributing to the decline in support and how to enable access to support for physical activity in older adults.