Possible Clues:

• With the rep back, it's critical to hang on
• Carry on through cut on energy
• Soldier on manoeuvres peers around at all times
• Exercise routine's beginning to get tough: don't give up
• Be unwilling to stop, but preserve energy somehow
• Soldier on exercises runs with strict discipline
• Hard getting through at first. Don't give up
• Don't give up
• Carry on showing awkward reserve in gym class
• Soldier on exercise, about to get cut off