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Producción Científica, Soccer is one of the most popular sports in the world. Players often suffer a variety of injuries, the most common being injuries to muscles and tendons. It is striking that with soccer, being the most practiced sport, and considering that most injuries occur in the lower extremities, plantar fasciitis (PF) is not one of the most frequent injuries (at least in terms of clinical data collected). The purpose of this review was to provide a comprehensive update of the topic “plantar fasciitis” focusing on soccer players. The review was conducted in accordance with the PRISMA (Preferred Reportiog ltems for Systmiatic reviews and Meta-Analyses) statement. PubMed, Cochrane Library and Scopus were researched. PICO (Patient, Population or Problem; Intervention; Comparison; and Outcome) components were identified. The keywords used were “plantar fasciitis”, “plantar fasciitis and sport”, “plantar fasciitis risk factors”, “plantar fasciitis soccer” and “plantar fasciitis football players”. With respect to the objective proposed for the research, we found eight specific articles focused on soccer. Of these, five were general reviews discussing the different methods of treatment of this pathology, and we have only found three studies that focused on PF in soccer, with two of them referring to a clinical case whereby the report and discussion only dealt with the specific treatment followed by the soccer player. After reviewing the manuscripts included in this work, we were surprised that there is no data in which the Silfverskiöld test was performed, as this test explores the passive mobility of the ankle and the degree of dorsiflexion in the supine position. We concluded that soccer players suffer pain in the sole of the foot compatible with plantar fasciitis; however, as indicated by Suzue et al., it is often not diagnosed because the athlete does not consider performing the clinical examinations necessary for its diagnosis. The shortage of reported publications in soccer may

A plantar foot pressure measurement provides important information which can be used as a helpful tool for evaluating patients with foot complaints. Foot plantar pressure systems are devices that are used to measure underfoot pressure. They can be classified into two types: platform systems and insole systems. An insole system is flexible and portable, thereby allowing a wider variety of studies to be carried out with different gait tasks, footwear designs and terrains, while a platform system is fixed and limited to the measurement of underfoot pressure in a static condition, and is usually used for the detection of ulceration. Currently, underfoot pressure ranges have not been effectively established, and there is insufficient information about the minimum and maximum values of underfoot pressure. Likewise, constraints with regard to the implementation of insole systems still persist and are represented by the need to put a spacer on the sensor during measurements, with the problem of sensor parameters changing after the calibration. Therefore, optimization of measurement techniques have been proposed for the implementation of an insole system to measure the underfoot pressure to overcome these drawbacks. This research was approved by the Human Research Ethics Committee of Universiti Putra Malaysia. The research was aimed at measuring the pressure of 15 points under the foot for 12 samples, divided into two groups (male and female). Two techniques were used to implement the insole system for the effective measurement of underfoot pressure, namely a sensor optimization of the output voltage swing, and the setting of the physical characteristics of a spacer to be placed on the sensors. In addition, a self- calibration technique was employed with the insole system to maintain the sensor measurements and to solve the problem of the changing of the sensor parameters after a period of time following the calibration. The performance of the proposed device after the appli