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By securing the ankle halfway you can expect the effect of connecting to the "pitch increase" and "stride increase".
By securing the ankle 90° forward and backward, the grounding time is reduced and the ground reaction force can be utilized for increased pitches and increased strides.
It is also expected to be effective in muscle and nervous system training, and your ankles will be toe-up after you remove the foot trainer.
Cannot be used in certified track and field competitions. In addition, depending on the shape of the shoe, it may not be able to