study of the effects of Low Load Resistance Training with Blood Flow Restriction on Pain and Function of individuals with Hamstring strain.

Investigating the immediate effect of low-load resistance training with blood flow restriction on pain and function in individuals with hamstring muscle strain

Clinical trial with intervention and control groups, with parallel groups, single-blind, randomized by envelope, on 16 participants in a single session before and after.

athletes aged 20 to 40 who have suffered a hamstring strain invited to come to the clinic of the Faculty of Rehabilitation, University of Tehran. Participants are randomly assigned to an intervention and control group (using an envelope that only the researcher knows about the groupings). Each group performs the same exercises But closed cuffs have different pressures.

Inclusion criteria: Men and women in the age range of 20-40 years At least 2 weeks have passed since the person's hamstring strain. Exclusion criteria: History of blood clots, high blood pressure, acute infection, peripheral vascular problems and varicose veins, cancer, overweight.

The intervention and comparison groups both include athletes with hamstring strain injuries and similar exercises are used in the intervention and the only difference in the intervention protocol of the two groups is that in the comparison group, only the cuffs are closed, but in the intervention group, according to the limb occolostion pressure, the cuffs are inflated to 80% of this pressure and the exercises are performed despite this pressure.

What is the average pain ،average hamstring muscle strength ، average passive knee extension amplitude average Active knee extension amplitude، average Timed Up and Go Test (TUG) before and after the intervention.

The method of randomization in this study is in the form of simple randomization and at the individual level and using sealed envelopes in two groups of 1 or 2 is as follows: 16 envelopes are prepared and in 8 envelopes the number 1 is written and in the other 8 envelopes the number 2 is written and these envelopes are moved in such a way that people know what number each envelope contains. They do not know and choose an envelope completely randomly, and after selecting that envelope, it is discarded and the next person makes his choice among the 15 envelopes, and in order to the end, people are placed in one of these two groups.

All participants are randomly divided into groups 1 or 2 using a sealed envelope, the person is not aware of which of the studied groups each group represents, and only the researcher is aware of which of these two groups is the control group and which is the intervention group. The only difference in the groups is the pressure in the cuffs during training, in which the intervention group performs the exercises using 80% of the pressure required to restrict blood flow in the lower extremities, and in the intervention group, only the cuffs are closed, and the only pressure is to the extent that the cuff does not descend from the limb. The participants do not train together at the same time, and the people do not know the amount of pressure in the other cuff, and the groups are quite similar in terms of the method of execution and appearance.

The individual data of the participants of this study as well as the data received from each person after the evaluation can be shared after de-identifying the person.

Data access can be started 6 months after the results are published.

These data will be available only to professors and students of academic and scientific institutions.

The researcher working in academic or scientific institutions is allowed to use all the data by informing the administrators and researchers of this study and apply all types of statistical analysis on these data.

To receive documents and data, they can send a message to my email address, hoomanbalef@gmail.com, or Ms. Sofia Naghdi naghdi@tums.ac.ir, my supervisor, so that we can guide them.

The applicant must first introduce himself and state his academic and academic degree and give a clear explanation about his use of the documents to the presenters, then with the approval of Mr. Homan Ahmadi Balef or Mrs. Dr. Sofia Naghdi, the data will be sent to them.