Tigers are intelligent and life in a small cage can be relentlessly boring; such tight confinement does not let them exercise, often leading to muscle atrophy and structural problems. Cincinnatti could not run when he arrived at In-Sync. The large playground area provides enrichment in the form of soft earth and grass to walk and run on, a rocky pool for climbing and swimming, logs to scratch, and the stimulation of toys and the scents of other tigers.