a. Fit as a fiddle - To be in excellent physical health. Example: "Even in his old age, he's fit as a fiddle." b. Sick as a dog - To be very ill or sick. Example: "After eating that spoiled food, I felt sick as a dog." c. Catch some Z's - To get some sleep or rest. Example: "I'm going to catch some Z's before the big presentation tomorrow." d. Mind over matter - The power of one's mind to overcome physical challenges. Example: "With a positive mindset, she proved that it's mind over matter." e. An apple a day keeps the doctor away - Eating healthy can help prevent illnesses. Example: "S