The choice of running shoes for a runner is always a nice dilemma: the wrong model could not only compromise performance and fun, but have negative effects on ankles, ligaments, back.
The factors that must be taken into consideration at the time of purchase are: the type of foot support that can be inside (pronated), outside (supinated) or neutral; weight; posture; the gait and the ground on which one runs.
More precisely, pronation is the rotatory movement of the foot inward after the phase of contact with the ground. This gesture helps cushion the initial impact by avoiding traumatizing the legs. The pronator athlete will tend to wear out the running shoes in the inner part of the heel and under the sole of the foot (in particular under the big toe). For this reason it is recommended to use running shoes with maximum support and well-structured able to help the runner to measure the impact of the race more effectively.
We have a supinated support when the outer side of the heel touches the ground at a greater angle and, consequently, the foot does not prone. In a supinator athlete the supportive foot trauma to the ground is therefore not amortized with the consequent direct transmission of shock to the legs. This side loading of the foot continues during the run affecting the efficiency of the step. The shoes of a supinator are more worn in the external area of the heel, while the upper part of the upper is more arched towards the outside. This category of athletes most prone to trauma and stress should opt for well-cushioned neutral running shoes. This will ensure that the joints can better support the impact of the foot with the ground.
On the other hand, when the sole of the shoe wears out by drawing an upside-down S that starts from the heel and reach the big toe, the runner has a neutral support. In this case the choice of running shoes is wide even if the most suitable ones are the so-called neutral shoes that guarantee maximum support and cushioning.
Keep running!