The effects of plyometric training with and without additional loads on neuromuscular index and performance in male youth’s soccer player

Determination the effects of plyometric training with and without additional loads on neuromuscular index and performance in male youth’s soccer players.

The present study is a randomized controlled trial study.

39soccer player (age between 15-17) are selected voluntarily and then randomly divided into three groups: Plyometric training with additional Load (n=13), Plyometric training without additional Load (n=13) and Control Group (n=13). Before and after the intervention, the neuromuscular indicators of people will be evaluated using isokinetic dynamometer and surface electromyogram. Plyometric training with additional Load performs plyometric training for 8 weeks (2 sessions per week) with an additional load equal to 10% of body weight. The Plyometric training without additional Load also performs the same volume as the Plyometric training with additional Load group without applying additional load and only with body weight. Also, the control group only continues their usual soccer training routine.

Gender is male and Age range between 15 and 17, BMI should be between 18-25, At least one year of experience participating in regional soccer, No history of surgery due to sports and musculoskeletal injuries

1. Control group, 2. Plyometric training with additional load, 3. Plyometric training without additional load

Neuromuscular indicators

Changing the age range of participants and sample size

Randomization method: Simple randomization Random unit: Individual Randomization Tool: Shuffle Cards Random Sequence Construction Method: The sample selection method will be available in this study and randomly divided into Three distinct groups. Prior to the implementation of the research, 39 young male soccer player (15-17years old) were selected after completing the health questionnaire in physical activity and obtaining personal data. The names of the subjects are recorded on individual cards (each subject has a special card). Then all the cards are thrown in the sphere and are thrown well. After each flipping, a card is removed from the sphere and according to the flipping sequence, they are placed in the control group or intervention 1 or intervention 2. The sequence is that the first card removed is assigned to the control group, the second card removed to intervention 1, and the third card removed to intervention 2. This process is repeated until all the cards are removed from the sphere and assigned to the studied groups. Then completing and registering names in their groups, to hide the process of grouping the subject, through a letter packed with their status in the study and their group will inform the subject. In this letter, the groups are marked with the number and the full description of each group's actions is mentioned. For example, in the closed letter, the first card that out of the ball, are cited the person's activities during the intervention, and the number of his group (group 1).

Subjects, instructors, and experts evaluating are kept blind in this study. In relation to the participant, each subject will be informed about the necessary details of their duties as well as their group number in a closed letter. The letter does not mention the group name and only the group number. However, in order to respect the ethics and rights of the subject, all of the tasks and actions that are to be performed are described. People in the control group will be coded with code 1, people in intervention group 1 with code 2, and people in intervention group 2 with code 3. The information about conducting tests and interventions for each group is fully explained and explained and interpreted in a separate meeting for each group. In addition, in order to perform the research plane, 3 coaches were assigned by a closed letter, while explaining all the training and safety issues for each group. Neuromuscular function tests are also performed by technicians and examiners who are fully aware of how to perform the tests. None of the examiners had any information about the intervention status of the subjects. Therefore, in this study, none of the instructors, subjects, and examiners have any information about the status of the subjects (which group is the intervention group and which one is the control group), although the tasks and all the tests and safety aspects will be describe for them.

All the data collected in the present study about the neuromuscular indicators as well as the individual characteristics of the participants can be shared with researchers.

Start accessing the data immediately after the results are published

Academic researchers

For the purpose of follow-up or meta-analysis studies

Shiraz University, Department of Sports Sciences, Dr. ‪Maryam koushkie Jahromi

Sending the application and providing the necessary documents for employment in one of the reputable scientific centers to the email address Koushkie53@yahoo.com.A response will be sent one week after submitting the request. If agreed, the data will be sent to the researcher as an Excel file.