On July 16, FNC Entertainment said that Rowoon felt back and knee pain while digesting the group schedule, and that a thorough examination showed that he has to avoid intense movements, including the current choreography. According to officials, Rowoon was informed by a doctor that his physical condition would worsen if he overused his body and was advised to take a rest along with treatments for the time being. Naturally, RowoonŌĆÖs schedules will be adjusted accordingly. The label added, ŌĆ£We will also inform the progress of RowoonŌĆÖs recovery and what will be decided regarding his future activities.ŌĆØ Then they asked fans for their understanding and promised, ŌĆ£Besides the schedules that are accompanied by intense choreography, we will make sure that there will be no disruptions to the schedule we promised with our fans.ŌĆØ Finally, they finished by saying, ŌĆ£We will do our best to ensure RowoonŌĆÖs quick recovery and make sure that his injuries donŌĆÖt worsen.ŌĆØ Source (1)

SF9   s Rowoon to Reschedule His Future Activities Due to Back and Knee Pain - 20