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The first thing that the Nike Free Run claims is injury prevention,[link widoczny dla zalogowanych], strengthening of the legs and natural gait management. The reason it claims all these is because a study not long ago stated that barefoot running can be good for you and give you all these benefits.
It stops injury because when you run with a thick running shoe,[link widoczny dla zalogowanych], you are more prone to receive strain or blisters. This is because when using the Nike Free Run there is less friction inside the running shoe and less bulk to go with it. The strengthening is achieved by the trainer working the muscles harder due to the heel and forefoot working harder. A more natural gait is achieved as the midsole has a much smaller heel placement meaning less of a difference when moving between the forefoot and heel.
Don't be mistaken by the trainers' thin and fragile looks though,[link widoczny dla zalogowanych], it happens to be well protected and durable in medium distance runs. The large rubber outsole is there to protect your heel from the sides via awkward rolls of the feet but most importantly the sole. The base of the Nike Free Run is also much lower than what it seems,[link widoczny dla zalogowanych], this is because the durable rubber goes up the sides and is not the starting point of the base.
Some people compare the Nike Free Run to the Vibram Five Fingers but in reality this is a more modern running trainer which focuses on style and appeal to their target audience,[link widoczny dla zalogowanych].
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