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IRCT20260322069009N1 IRCT 2026-05-22 The University of Tehran Comparison of two corrective exercise programs to improve the spine of dentists Comparison of the Effect of National Academy of Sports Medicine (NASM)-Based Corrective Exercises with and without Hamstring Stretching on Posture and Quality of Life in Dentists with Upper Crossed Syndrome 2026-06-10 anticipated 30 Recruiting https://irct.ir/trial/89359 interventional Randomization: Randomized, Blinding: Not blinded, Placebo: Not used, Assignment: Parallel, Purpose: Treatment, Randomization description: In this study, researchers employ a block randomization method to assign patients to two distinct groups. The approach involves dividing patients into smaller blocks and then randomly allocating them to the main research groups (NASM exercises with hamstring stretching and NASM exercises without hamstring stretching). The goal is to balance the groups and minimize the impact of confounding variables on the research outcomes. Implementation steps: Patient numbering: Each patient is assigned a unique identifier. Web application utilization: To facilitate randomization, a specialized web application named "Research Randomizer" is used. This tool automatically distributes patients into groups using random algorithms. Block division: Patients are divided into 5 blocks of 6 individuals each. This is done to ensure balance within each block. Group assignment: Patients within each block are randomly assigned to groups A and B in sequence. The sequence is determined by the web application. Formation of main groups: Ultimately, patients from all blocks are combined, forming two main 15-person groups (NASM exercises with and without hamstring stretching). N/A Upper cross syndrome. Intervention 1: Intervention Group: In this group, in addition to the full implementation of the National Academy of Sports Medicine (NASM) corrective exercise protocol—which follows a specific structure and includes inhibitory, lengthening, activation, and integration techniques—dedicated hamstring stretching exercises will also be added to the training. These stretching exercises are designed to reduce hamstring tightness, which can indirectly affect posture and muscular balance in the posterior kinetic chain. The stretching exercises are incorporated into the lengthening phase and include static stretching held for 30 seconds, with three repetitions per leg. These stretches will be progressively adjusted based on the individual’s flexibility. Close supervision of the correct execution of these stretches will prevent injury and ensure the quality of the intervention.Each training session lasts 50 minutes and is performed three times per week for 8 weeks. The structure of each session includes 5 minutes of general warm-up (light aerobic movements and dynamic stretches), 40 minutes of main exercise, and 5 minutes of cool-down. Intervention 2: Control Group: The exercise intervention in this group will be designed and implemented based on the corrective exercise model of the National Academy of Sports Medicine (NASM). Each training session lasts 50 minutes and is performed three times per week for 8 weeks. The structure of each session includes 5 minutes of general warm-up (light aerobic movements and dynamic stretches), 40 minutes of main exercise, and 5 minutes of cool-down. The main exercise portion is delivered in four consecutive phases: (1) Inhibitory – using foam rollers for myofascial release of overactive muscles; (2) Lengthening – using static stretches for shortened muscles; (3) Activation – strengthening weak muscles with targeted resistance exercises; and (4) Integration – providing compound exercises to coordinate muscles in functional movement patterns. The exercise intensity is set at a low to moderate level, and the types of movements are specifically designed to address postural abnormalities resulting from upper crossed syndrome. Yes - There is a plan to make this available What will be shared: All data obtained from this research will be made freely and openly available to researchers and interested parties through academic databases and reputable scientific articles, after the anonymization of participants. When: 6 to 15 months after the publication of the results To whom: All researchers, therapists and specialists. Conditions: With the aim of facilitating the improvement of the level of academic research and improving the treatment of patients by therapists, researchers and specialists. Where to obtain: Parisa Shahrzad, Faculty of Physical Education, University of Tehran (Tehran - North Kargar St. - above Jalal Al Ahmad Intersection - between 15th and 16th St. - in front of Tehran University Koi). Email: Parisashahrzad@yahoo.com How to obtain: As soon as the scientific articles are published, all relevant findings and data that can help to advance research and improve treatment methods will be available to the scientific community. Comments:
public Parisa Shahrzad
No 8, Mahootchi Street, Kachooii Street, Evin
Tehran Iran (Islamic Republic of) 1983655398 +98 21 2241 2082 parisa.shahrzad1@ut.ac.ir The University of Tehran scientific Hooman Minoonejad
opposite University of Tehran Dormitory (Kuy-e Daneshgah), Between 15th & 16th Streets, North Kargar Street, above Jalal-e-Ale Ahmad Intersection, Tehran
Tehran Iran (Islamic Republic of) 1439813117 +98 21 8835 1730 H.minoonejad@ut.ac.ir The University of Tehran Iran (Islamic Republic of) They must have at least 3 years of dental practice experience Body Mass Index (BMI) less than 30 Having an abnormality with a chest kyphosis angle of 42 degrees or more, a head forward angle of 45 degrees or more, or a shoulder forward angle of 52 degrees or more Medical certificate attesting to the ability to perform light to moderate physical exercises. Shortening of the hamstring muscle, based on the straight leg raise test (SLR) (less than 80 degrees) 30 years 40 years Both Presence of acute or chronic musculoskeletal diseases that prevent exercise History of spinal or upper extremity surgery that may affect ability to exercise Receiving similar corrective interventions (such as physiotherapy or corrective exercises) in the past 6 months M40.0 Postural kyphosis Treatment - Other Treatment - Other Intervention Group: In this group, in addition to the full implementation of the National Academy of Sports Medicine (NASM) corrective exercise protocol—which follows a specific structure and includes inhibitory, lengthening, activation, and integration techniques—dedicated hamstring stretching exercises will also be added to the training. These stretching exercises are designed to reduce hamstring tightness, which can indirectly affect posture and muscular balance in the posterior kinetic chain. The stretching exercises are incorporated into the lengthening phase and include static stretching held for 30 seconds, with three repetitions per leg. These stretches will be progressively adjusted based on the individual’s flexibility. Close supervision of the correct execution of these stretches will prevent injury and ensure the quality of the intervention.Each training session lasts 50 minutes and is performed three times per week for 8 weeks. The structure of each session includes 5 minutes of general warm-up (light aerobic movements and dynamic stretches), 40 minutes of main exercise, and 5 minutes of cool-down. Control Group: The exercise intervention in this group will be designed and implemented based on the corrective exercise model of the National Academy of Sports Medicine (NASM). Each training session lasts 50 minutes and is performed three times per week for 8 weeks. The structure of each session includes 5 minutes of general warm-up (light aerobic movements and dynamic stretches), 40 minutes of main exercise, and 5 minutes of cool-down. The main exercise portion is delivered in four consecutive phases: (1) Inhibitory – using foam rollers for myofascial release of overactive muscles; (2) Lengthening – using static stretches for shortened muscles; (3) Activation – strengthening weak muscles with targeted resistance exercises; and (4) Integration – providing compound exercises to coordinate muscles in functional movement patterns. The exercise intensity is set at a low to moderate level, and the types of movements are specifically designed to address postural abnormalities resulting from upper crossed syndrome. Kyphosis angle. Timepoint: It is evaluated at the beginning of the research and after 8 weeks, that is, before and after the treatment. Method of measurement: The kyphosis angle is measured using a flexible ruler. Forward head angle. Timepoint: It is evaluated at the beginning of the research and after 8 weeks, that is, before and after the treatment. Method of measurement: The forward angle of the head is done using the photogrammetry method (photographing from the side view). The forward shoulder angle. Timepoint: It is evaluated at the beginning of the research and after 8 weeks, that is, before and after the treatment. Method of measurement: The forward shoulder angle is done using the photogrammetric method (side view photography). Quality of Life. Timepoint: It is evaluated at the beginning of the research and after 8 weeks, that is, before and after the treatment. Method of measurement: Using Short Form Health Survey questionnaire (SF-36). The University of Tehran Approved 2026-02-01 Ethics Committee, Faculty of Sport and Health Sciences, University of Tehran opposite University of Tehran Dormitory (Kuy-e Daneshgah), Between 15th & 16th Streets, North Kargar Street, above Jalal-e-Ale Ahmad Intersection, Tehran Tehran Tehran Iran (Islamic Republic of)