Possible Clues:

• Start of a brain health saying
• “Can you ___ in a sentence?” (spelling bee request)
• Start of an exercise admonition
• Opening of a fitness motto
• Avoid atrophy, in a rhyming dichotomy
• Start of a saying about staying fit
• "Can you ___ in a sentence?" (spelling bee request)
• Start of a fitness maxim
• Odyssey "___ Up & Wear It Out"
• Odyssey "___ Up and Wear It Out"