It is a physical activity wereable. It acts as a witness to physical activity and transmits the data to the computer or smartphone.

It is a physical activity wereable. It acts as a witness to physical activity and transmits the data to the computer or smartphone.

They will not use any type of sports technology application. They will continue to perform their daily activities without intervention.

It is an application that promotes the practice of physical activity by recording the sports activities that the subject performs, as well as the dissemination of the same in social networks and participation in challenges available to users around the world. In addition, this application includes reminders of physical activity and personal achievements to encourage the practice of sports.

It is an application that promotes sports practice, nutritional habits and the necessary rest. Nutrition and sleep will be introduced as variables that favor a healthy lifestyle.

It is a mobile game that favors the increase of physical activity because it is necessary to walk to achieve the proposed objectives.

It is an app whose goal is to be a support in training of strength-resistance training. Setting a specific goal, with a full databaseover of exercises to perform.

It is a physical activity wereable. It acts as a witness to physical activity and transmits the data to the computer or smartphone.

It is a physical activity wereable. It acts as a witness to physical activity and transmits the data to the computer or smartphone.

Life satisfaction is defined as a person's overall evaluation of his or her life. The person examines the tangible aspects of his or her life and compares them with a standard or criterion chosen by him or her, arriving at a judgment about satisfaction with his or her life (Pavot et al., 1991). Thus, judgments about satisfaction depend on the comparisons the subject makes between the circumstances of his or her life and a standard that he or she considers appropriate. The life satisfaction scale (Diener et al., 1985) provides information on feelings of happiness, feelings of loneliness and satisfaction in school among adolescents, obtaining an overall assessment of life satisfaction. The scale is composed of five questions that are answered on a scale of 1 to 5, with 1 being "strongly disagree" and 5 "strongly agree". The minimum score will be 5 and the maximum 25 points. A higher score indicates greater satisfaction with life.

The 20-m shuttle run test evaluates maximal aerobic capacity by means of an incremental 20-meter out-and-back test. The initial speed of the test is 8.5 km/h and is increased every minute by an audible signal. The test ends when the subject stops or fails to reach the reference line two consecutive times. The speed recorded is the speed reached in the last stage that the subject is able to complete. Through the equations of Leger, Mercier, Gadoury and Lambert (1988) the reference value of the subject's VO2 max. is obtained.

The test will provide information about the isometric force (kg) that the participant is able to develop with the forearm musculature. For this purpose, a digital dynamometer with manual grip (5030J1, Jamar ®, Sammons Preston, United Kingdom) will be used. Prior to the execution, the instrument will be adjusted according to the age of the player and the length of his/her hand. Two measurements will be taken with each arm, with a one minute rest between them. The participant must hold the dynamometer with the executing hand and the arm extended along the torso, without contacting it, and produce the maximum force possible (Rojas, Vázquez, Sánchez, Banik, & Argáez, 2012; Valdes & Yanci, 2016). Manual grip strength determined by dynamometer is significantly associated with proper cardiovascular health in adolescents, so its analysis is of interest as part of an assessment of global physical fitness (García-Hermoso et al., 2019).

The countermovement jump test (CMJ) will be used to measure this variable. This test provides information on the explosive strength of the lower body. The CMJ is a vertical jump that begins with the subject in a standing position, followed by knee flexion to a position of approximately 90 degrees, and a rapid extension of the knees to perform a jump in which the maximum height is reached. It should be noted that there is no stop in the knee flexion position since the intention is to take advantage of the explosive elastic reflex energy of the movement. The subjects will perform two repetitions of the jump 2 minutes apart. A MuscleLab force platform (Ergotest Innovation S.A., Norway) will be used to record the data, which will measure the time of flight from the time the subject takes off from the platform to the time the subject re-enters contact with the platform.

The sit-and-reach test will be used. A 30-centimeter measuring box (Finder Flex-Tester, Novel Products, USA) with a millimeter ruler is required. In the initial position, the subject should be in a seated position, with knees fully extended feet hip-width apart and soles of the feet perpendicular to the floor and in contact with the box. The subject will be asked to place one hand on top of the other, with the palms of the hands facing downward and the fingers stretched out. The subject will perform a neck flexion to bring the chin to the chest and a trunk flexion with the knees fully stretched and without ballistic movements, trying to reach the greatest possible distance and maintaining the posture for 3 seconds. The distance will be measured in centimeters and the value 0 will correspond to the tangent of the soles of the feet, the values being positive when this distance is exceeded, and negative when it is not reached.

Upper lower body strength is measured form a standing position with feet approximately shoulder´s width apart. Participant jump as far forward as possible. The test is performance twice. The longest distance achieved was recorded in centimeters20.

To measure height, a SECA measuring rod should be used. Adolescents should stand barefoot with their backs against the measuring rod, heels of their feet together and their gaze straight ahead. Measurements will be obtained in centimeters and will be repeated 2 times for each subject. A third measurement will only be taken if the difference between the first and second measurement is greater than 1%.

A Tanita BC 418-MA Segmental scale (Tanita, Tokyo) will be used to measure body weight. The subject will step on the scale with both feet inside the scale and looking straight ahead, without leaning the body. Values will be obtained in kilograms and two measurements will be carried out on each subject. If the difference between both measurements is greater than 1%, a third measurement will be taken

To obtain the fat mass, it will be necessary to previously measure the triceps, thigh and leg folds, and the waist, hip, relaxed arm, thigh and leg perimeters. For these previous measurements, two measurements will be taken in each subject, and a third measurement will be necessary if the difference between the first two is greater than 5%. Once the values of the previous measurements have been obtained, the fat mass can be calculated using the formula of Slaughter et al. (1988)

To obtain the fat-free mass, it will be necessary to previously measure the triceps, thigh and leg folds, and the perimeters of the waist, hip, relaxed arm, thigh and leg. For these previous measurements, two measurements will be taken in each subject, and a third measurement will be necessary if the difference between the first two is greater than 5%. Once the values of the previous measurements have been obtained, the-fat free mass can be calculated using the formula of Poortmans et al. (2005)

To assess upper limb strength will be used Push-up test. The subject will perform as many repetitions as possible in one minute, or until reaching exhaustion (Castro-Piñero et al., 2010).

To assess abdominal muscle endurance will be use Curl-up. The highest number of repetitions the subject completes in one minute will be recorded (García-Pastor et al., 2016).

To assess maximum speed will be used 20-m sprint. A maximum speed sprint over 20 meters will be performed, following the protocol of previous research (García-Manso et al., 1996). Photocells placed at hip height will be used for timing quantification (Altmann et al., 2017).

Previously obtained height and weight measurements will be used to establish the BMI. The formula used will be weight/height^2, and the result will be obtained in kg/m^2. This index is commonly used and is related to metabolic and cardiovascular diseases in adolescents and adults.

This questionnaire is made up of 24 items grouped into six factors and analyze different basic psychological needs, as described in the Self-Determination Theory (SDT), developed by Deci and Ryan. Autonomy is evaluated by four items, relatedness is evaluated by four items, and competence by four items. The frustration of each of the basic psychological needs, in turn, is evaluated by four elements each. The 14 items will be evaluated through a five-point Likert-type scale, ranging from 1 (completely false) to 5 (completely true). All factors values range 4 and 20 points. Higher scores report a better score in the factor.

To assess motivation towards physical education classes, the Perceived Locus of Causality Scale (PLOC) has been used. This scale is made up of 20 items on a 7-point Liker scale from completely agree to completely disagree. These items evaluate 5 factors: intrinsic motivation, identified regulation, introjected regulation, external regulation and amotivation. All factors values range 1 and 7 points. Higher scores report a better score in the factor.

It will assessed by bioimpedance in percentage, following the recommendations of Brantlov et al. (2017) for proper execution.

It will assessed by bioimpedance in percentage, following the recommendations of Brantlov et al. (2017) for proper execution.

It will assessed by bioimpedance in kilogramers, following the recommendations of Brantlov et al. (2017) for proper execution.

It will assessed by bioimpedance, in kilogramers, following the recommendations of Brantlov et al. (2017) for proper execution.

It will assessed by bioimpedance in kilogramers, following the recommendations of Brantlov et al. (2017) for proper execution.

The User version of the Mobile Application Rating Scale (uMARS) is a scale consisting of 26 items completed using a Likert scale ranging from 1 to 5 points. This scale allows for the assessment of 6 dimensions, which include engagement, functionality, aesthetics, information, subjective quality, and perceived impact of the mobile application (Martin-Payo et al., 2021). All factors values range 1 and 5 points. Higher scores report a better score in the factor

Biological maturation will also be assessed since it can be crucial during this stage of development. To do this, the sexspecific formula from Mirwald et al. (2002) will be used to estimate the maturation offset of the adolescents. Based on the maturation offset, the biological maturation of each subject will be calculated (Albaladejo-Saura et al., 2022).

The educational institution will be asked for the academic record of the academic year in which the measurements are conducted for the participating students in order to establish the relationship between the level of physical activity and academic performance. Academic performance will be obtained with the average grade of all the subjects taken by the participant in the course in which the program is developed. This average grade will be provided by the school.

The KIDMED questionnaire (Serra-Majem et al., 2004) will be used to establish the level of adherence of adolescents to the Mediterranean diet. It consists of 16 questions that are scored with a value of -1 if they denote a negative connotation with respect to the Mediterranean diet, or with a +1 if they are positive in relation to the diet. The index ranges from 0 to 12 points and the results are classified as: optimal Mediterranean diet (>8 points), requires improvement to adjust intake to Mediterranean patterns (4-7 points), and very low diet quality (≤ 3 points). The questions included in the questionnaire are related to the main foods included in this type of diet (fruit, vegetables, bread, etc.).