Viken H, et al. - This is the largest study to determine dropout-predictors in a long-term exercise program in older adults. Researchers determined the dropout rate and its predictors during a 3-year exercise program in older adults by analyzing data of 1514 men and women. Data reported that the total dropout rate was 11.0% after 1-year and 14.9% after 3-years. Low education, low grip strength, lower cardiorespiratory fitness (CRF), low physical activity (PA) level and randomization to supervised exercise were significant predictors of dropout after 1-year and the same predictors of dropout were significant after 3-years, with reduced memory status as an additional predictor. The results obtained from the study provide new and important knowledge about the potential risk factors of dropout in long-term exercise programs in older adults.