Abstract
Minimalist shoes are proposed to prevent injury and enhance performance by
strengthening intrinsic foot muscles, yet there is little consensus on the
effectiveness of minimalist shoes in increasing muscle strength or size. This
systematic review assesses using minimalist shoes as an intervention on changes
in plantar intrinsic foot muscle size and strength. PubMed, CINHAL, Scopus, and
SPORT Discus were systematically searched for articles from January 2000 to
March 2022. Studies were included if they had an intervention of at least 2
weeks with a control group and examined the effect of minimalist shoes on
plantar intrinsic foot strength or size (either volume, cross-sectional area, or
thickness). Nine studies were included. There were significant increases and
percent changes in foot muscle strength, volume, cross-sectional area, and
thickness. Strength increased between 9–57%, and size increased
between 7.05–10.6%. Minimalist shoes may effectively increase
intrinsic foot muscle size and strength in healthy individuals, and they may
also be more convenient than implementing time-intensive physical therapy
programs. Future research is needed to explore using minimalist shoes as an
intervention in clinical populations who would benefit from increased IFM
strength and function. It will also be vital to improve upon IFM assessment
methods.
Key words
minimalist shoes - intrinsic foot muscles - toe flexor strength - running