Related Clues:

• Not slowing down a bit
• Agile for one's age
• Lissome
• Ballerina-like
• Like a wet noodle
• Droopy
• Not taut
• Worn out
• Drill instructor's shout
• Comfortable
• Gymnastically gifted
• Past tense?
• Opposite of "Ten-hut!"
• Vigorously active
• Lively, especially for one's age