ONE STATION UNIT TRAINING
Physical readiness training in OSUT brings Soldiers through the toughening phase and prepares them for the rigors of their first unit of assignment. New Soldiers follow the same progression as BCT during the red/white/blue phases of OSUT.
Commanders should continue conducting toughening phase activities until Soldiers meet Army standards. Soldiers can then transition to sustaining phase activities during the black/gold phases of OSUT. These activities are more difficult and complex and prepare Soldiers to perform the physical requirements of their duty assignments as their units prepare for full spectrum operations See Chapter 5 for OSUT planning considerations.