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Cool Sneakers

It Must Be the Shoes!

By: Terri Rejimbal, RRCA Certified

As runners, we don’t need much equipment to perform our sport, but a good pair of running shoes is a must. One of the first lessons we learn is to buy new shoes after 300-500 miles. Once the foam wears out, the material loses its ability to absorb shock, and the risk of overuse injuries increases. “When” to replace your shoes will depend on your body type, running mechanics, and gait. A second important lesson is to rotate your shoes to accommodate different workouts.

Do you wonder why that is?


The thousands of steps we put on our shoes leads to a decline in its cushioning. Even though the bottom of the shoes may appear to have plenty of treads, the midsole material can still be broken down. Rotating shoes can increase their longevity by allowing the cushioning to “recover” which can take 24 to 48 hours. Having another pair gives your shoes a rest day while supporting you on your next run. Rotating the types of shoes used for different runs and workouts is beneficial in several ways:

Training Muscles 

Switching up your shoes will allow you to build strength in those smaller muscles of the lower legs that get challenged by a lighter shoe. Training in a lightweight/minimal shoe will engage more muscles than a fully cushioned or stability shoe. Heavier cushioned or stability shoes are great for shock absorption on long runs or when your legs feel fatigued from the day before.

Injury Prevention

Running is extremely repetitive—an hour-long run will likely accumulate over ten thousand foot strikes; each impact very much like the previous one. Training in a range of shoes provides diversity in the same way that changing running surfaces does (road, trail, grass, treadmill). Or think of it like working out in the gym, doing different weight exercises that target the same body part, but in a slightly different way. Different shoes distribute running forces differently, thus lessening the strain on any given body part. By changing shoes or terrain, you vary the repetitive impact on your body, thereby reducing the risk of a repetitive stress injury.

Eliminate Potential Muscle Imbalances 

If you consistently run in the same pair of shoes, over time the shoe foam changes as it wears down, affecting your running form and muscles, not just your feet but all over. In time, you’ll begin to compensate for those imbalances, which can lead to injury. Think about what can happen when you increase training intensity or mileage, and you’re running in the same pair of shoes day after day. Avoid overloading any one muscle, bones, tendons, or ligaments while simultaneously strengthening others, simply by changing your shoes.

To accommodate the various types of runners and workouts performed, shoe companies make a variety of different models, styles, and versions of shoes. Within a style line of shoes, you can find a cushioned trainer (tends to be heavier and durable), a lightweight shoe (which can be a racer), and a racing flat. For example, I wear a New Balance Zante or HOKA Conquest for my easy and long runs. For tempo and intervals, I run in New Balance Zante Pursuit or Solas. For racing, I prefer New Balance Solas or Reebok RunFast. Each shoe has a different attribute that contributes to the purpose of the intended run. Different shoes for different runs. Like a training plan, you have different workouts.

In different models, even those within the same foot-function category - neutral, stability, motion control - you will strike the ground and run slightly differently. In doing so, you will be shifting the stresses on your body from model to model, which may help reduce your chance of injury. I hate breaking in new shoes! By varying my shoe type for the type of run I’m doing, allows me to gradually introduce a new pair into my training cycle without too much disruption and risk of injury. Take the next step in your training and experiment with your shoe collection. When making any change to your running shoes, it’s best to make any change gradually, allowing your body to adapt. When experimenting with different styles, be aware that it is normal to have some increased soreness because you aren’t accustomed yet. However, don’t confuse pain with injury, unless those injury signs are present during your run even with your normal beloved shoes. Remember to be brand impartial when shopping. Seek out your neighborhood running store for assistance in fit and guidance with a new shoe selection that works for you.

About The Author

Terri Rejimbal is a competitive Masters athlete, a 3-time winner and 8-time Masters champion of the Gasparilla Distance Classic half-marathon; 6-time Disney Masters marathon winner, 7-time Florida USATF Athlete of the Year, and a New Balance product tester. Terri is a RRCA certified running coach and available for consulting or coaching services. Contact Terri at or on Instagram @bayshorerunner.

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