1. Hamstring muscle injury 2.Hamstring strain 3.Functional disorders of the hamstring muscles. Injury of muscle, fascia and tendon of the posterior muscle group at thigh level
Conditions
Interventions
Intervention 1: Intervention group 1: Participants in this group will perform Nordic hamstring training according to a low-volume protocol for six weeks. In weeks 1 and 2, two sessions per week, each
The participant starts at a 90-degree knee flexion angle and slowly lowers their body toward the ground. Intervention 2: Intervention group2 : Participants will perform Nordic hamstring exercises for
in week 2, two sessions, each with two sets of six repetitions
and in weeks 3 to 6, three sessions per week with increasing sets and repetitions as follows: week 3 - three sets of seven repetitions, week 4 - three sets of nine repetitions, and weeks 5 and 6 - thr
Sponsors
Shahid Beheshti University
Eligibility
Sex/Gender
All
Age
18 Years to 25 Years
Inclusion criteria
Inclusion criteria: 1. Age range of 18-25 years 2.Body Mass Index (BMI) below 25 3.Minimum of two weekly training sessions and 2 years of sports experience 4.No history of severe hamstring injury (grade 3) in the past 18 months 5.No severe lower limb deformities (grade 3 or 4) 6.No prior experience with Nordic hamstring exercises 7. Normal knee range of motion and no hamstring tightness 8. No anterior cruciate ligament (ACL) injury in the past 18 months
Exclusion criteria
Exclusion criteria: 1. Unwillingness to continue participation 2.Consecutive absence from two training sessions 3.Occurrence of acute hamstring injury during the study 4. Absence from measurement sessions 5. Performing resistance exercises similar to Nordic exercises outside the protocol
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| 5.Examination of lower limb abnormalities in active people. Timepoint: 5.Examination of lower limb deformities in week zero, before entering the study. Method of measurement: Lower limb deformities: Measurement with Posture Assessment GridBrand: Fabrication EnterprisesUnder the Baseline brandModel: Baseline Posture Evaluation Set.;6. Brief examination of the hamstring muscle in both legs in active people. Timepoint: 6. Examination of hamstring muscle shortening in both legs, at week zero, before entering the study. Method of measurement: Hamstring muscle shortening in both legs: Based on measurements taken with the ACTIVE KNEE Extension test using a universal 360-degree goniometer.;1. Percentage Changes in the fascicle length of the biceps femoris long head in the dominant leg of active people. Timepoint: 1. Initial measurement (pre-test) of the fascicle length of the biceps femoris muscle (long head) in the dominant leg at week zero, before the start of training.2. Final measurement (post-test) at the end of the sixth week, 48 hours after the last training session. Method of measurement: Fascicle length of the biceps femoris muscle (long head) in the dominant leg: measured with the Samsung Ugeo WS80A ultrasound device.;2. Percentage Changes in thickness of the biceps femoris (long head) in the dominant leg of active people . Timepoint: 2. Initial measurement (pre-test) of the thickness of the biceps femoris muscle (long head) in the dominant leg in week zero, before the start of training 2. Final measurement (post-test) at the end of the sixth week, 48 hours after the last training session. Method of measurement: thickness of the biceps femoris muscle (long head) in the dominant leg: measured with the Samsung Ugeo WS80A ultrasound device.;3. Percentage Changes in pennation angle of the biceps femoris (long head) in the dominant leg of active people . Timepoint: 3. Initial measurement (pre-test) of the pennation angle of the biceps femoris muscle (long head) in t | — |
Countries
Iran (Islamic Republic of)
Contacts
Public ContactPooneh Dehghan
Shahid Beheshti University of Medical Sciences
Outcome results
None listed