What is a common progression method for running programs?

• A. Introduce one extra easy running day each week while keeping total mileage the same.
• B. Increase weekly mileage by 5-10% or add one additional easy running day.
• C. Increase long runs by 2 miles every week.
• D. Only do high-intensity intervals and skip easy runs.

Answer: (B)

Progressive overload in running programs relies on increasing training stress in small, sustainable steps so the body can adapt without getting overwhelmed. The most common and effective way to do this is to raise weekly mileage gradually—typically about 5-10% per week—and/or add an extra easy running day. This keeps the overall workload rising at a pace that your muscles, joints, and energy systems can handle, while also allowing recovery between harder efforts.

Why this works best: small, regular increases build endurance and speed without spiking injury risk. Spreading the load with an additional easy day gives your body time to adapt and recover, which is essential for sustained improvement.

Why the other ideas fit less well: boosting long runs by 2 miles every week tends to push the body too hard too soon and can lead to overuse injuries; and doing only high-intensity intervals with no easy runs removes essential recovery and base-building work, making progress harder and riskier. Additionally, introducing an extra easy day without increasing overall volume can help recovery but doesn’t provide the progressive stimulus needed for steady improvement unless the total weekly load is also increased.