BACKGROUND We assessed the relationship between objectively measured sedentary bout frequency with recurrent falls (2+ falls/year). METHODS The sample included 2,918 men aged 79.0±5.1 years attending the Osteoporotic Fractures in Men Study (MrOS) Year 7 (2007-2009) visit. Sedentary bout frequencies were defined as the average daily number of transitions out of 5+ minutes sedentary ( RESULTS Over four follow-up years, 1,025 (35.1%) men had recurrent falls. Compared to men with CONCLUSIONS A U-shaped association may exist between sedentary bout frequency and recurrent falls risk. The least and most active men are at higher risk.