Walking in Minimalist Shoes Is Effective for Strengthening Foot Muscles.

Weak intrinsic foot muscles have been linked to loading-related injuries, and researchers have wondered whether supportive footwear might contribute to this weakness by reducing the work these muscles do during walking. This trial compared two ways of challenging the foot muscles more: walking in minimalist shoes versus doing a structured foot-strengthening exercise program, against a control group that did neither, in 57 runners who kept their usual running mileage. Over eight weeks, both the minimalist shoe walking group and the exercise group showed significant increases in foot muscle size and strength, with some changes appearing by the midpoint, while the control group showed no change. This suggests footwear changes might offer an alternative route to foot muscle adaptation.

The abstract does not report whether one approach outperformed the other, and the main limitation is that this is a single trial in runners, not yet showing how this translates into lower injury rates or applies to other populations.

If you've ever wondered whether your shoes affect the strength of the small muscles in your feet, this study offers a window into that question. Researchers had runners either walk in minimalist shoes, do specific foot-strengthening exercises, or continue as normal, while keeping their regular running routine throughout. After eight weeks, both the minimalist shoe walkers and the exercise group showed increases in the size and strength of their foot muscles, while the group that changed nothing showed no change.

This is interesting because it suggests there may be more than one way to build foot muscle strength, not just through dedicated exercises but potentially through everyday footwear choices too. It's worth keeping in mind this was one study in runners, and it doesn't tell us whether stronger foot muscles actually prevent injuries or whether walking in minimalist shoes works better or worse than doing exercises directly. Those questions remain open.

This is a summary of research, not medical advice. Talk to your own healthcare provider about anything affecting your care.

This trial speaks to a question many physiotherapists encounter when discussing footwear and foot strength: can footwear itself serve as a muscle-training stimulus, or is dedicated exercise necessary? Fifty-seven runners were randomised to minimalist shoe walking, a progressive foot-strengthening exercise program performed at least five days weekly, or a control condition, with foot muscle size measured by ultrasound and strength via custom dynamometers at weeks 0, 4, and 8. Both intervention groups showed significant within-group increases in muscle size and strength relative to baseline, with some muscles responding by week 4, while the control group showed no change. This informs clinical reasoning by suggesting that graded exposure to minimalist footwear may produce muscle adaptations comparable in direction to a structured exercise program, offering a potentially more convenient compliance pathway.

However, the abstract does not report a direct between-group statistical comparison, so it does not establish that one intervention was superior to the other. Importantly, these are muscle size and strength outcomes measured in runners over eight weeks, not injury or performance outcomes, so the findings do not establish that either intervention reduces injury risk or improves running function. The abstract does not mention adverse events.