Which replacement intervals are commonly used for athletic shoes according to guidelines?

• A. After every 3-6 months of use
• B. After every 100 hours of use
• C. After every 500 miles of use
• D. All of the above

Answer: (D)

Shoes don’t stay supportive forever—the midsole cushions compress, the outsole wears, and stability can decline with use. Replacing them on a schedule that reflects how you actually use them helps keep your movements aligned and reduces injury risk. Guidelines commonly use multiple signals: after about 3–6 months of regular use, after roughly 100 hours of wear, or after about 500 miles of running or walking. Each criterion captures different aspects of wear, so it’s common to see all of these as valid replacement points. If you’re in a mix of activities or log miles and hours, you might hit different thresholds at different times, which is why these intervals are all commonly used.