Acute Effects of Self-Myofascial Release Using Various Foam Rollers on Knee Extension Angles and Hamstring Muscle Tone in Subjects with Shortened Hamstrings: A Randomized Controlled Trial

김민지,이지현,류전남 한국신경근육물리치료학회 2022 한국신경근육재활학회지 Vol.12 No.3

This study aimed to compare the effects of hamstring self-myofascial release using three different foam rollers on the passive and active angles of knee extension and hamstring muscle tone in subjects with shortened hamstrings. Twenty subjects with shortened hamstrings were included. The passive and active knee extension angles and hamstring muscle tone were measured immediately after each self-myofascial release of the hamstring muscles using a soft-, hard-, or grid-type foam roller. A goniometer was used to measure the passive and active knee extension angles, while a Myoton PRO was used to measure the hamstring muscle tone. The passive and active knee extension angles significantly increased and the hamstring muscle tone significantly decreased after all interventions (p<.05). However, none of the dependent variables differed significantly among the three groups (p>.05). All soft-, hard-, and grid-type foam rollers effectively improved hamstring flexibility and muscle tone in subjects with shortened hamstrings. Our findings suggest that individuals should choose the foam roller that is comfortable for them.

Analysis of Changes in Muscle Tone, Stiffness, and Flexibility of Hamstring Muscle according to the Frequency of Self- Myofascial Release Using a Foam Roller

왕중산,김년준 국제물리치료연구학회 2024 Journal of International Academy of Physical Ther Vol.15 No.1

Background: Self-myofascial release using a foam roller has short-term effects for improving muscle function and joint range of motion (ROM) and reducing delayed onset muscle soreness (DOMS) after exercise. Objectives: The purpose of our study was to examine the muscle physiological changes for each set in self-myofascial release of the hamstring muscles using a foam roller in order to provide basic data for the most effective program composition for improving muscle tension, stiffness, and flexibility of the hamstring muscles. Design: A quasi-experimental clinical trial. Methods: To confirm the effect of self-myofascial release of the hamstring muscles using a foam roller, muscle tone and stiffness of the hamstring muscles were measured. As an intervention method, the study subject performed four sessions of self-myofascial release by moving a foam roller back and forth on the posterior thigh muscle of the right leg. Results: There were statistically significant changes in the stiffness of the biceps femoris and the flexibility of the hamstring muscles. Conclusion: Self-myofascial release with foam rolling is an effective intervention method for increasing hamstring flexibility and ROM, and it is recommended as effective to perform self-myofascial release for three to four sessions to maintain normal muscle tone and stiffness of the hamstring muscles.

Hamstring Foam Roller release and Sole Self Myofascial Release for Improving Hamstring Muscles Flexibility in Participants with Hamstring Shortness

( Geun-woo Kim ),( Ji-hyun Lee ) 대한물리의학회 2020 대한물리의학회지 Vol.15 No.4

PURPOSE: The current generation has shortened hamstrings due to a sedentary lifestyle, resulting in reduced flexibility of the hamstring and dysfunction. This study was undertaken to compare effects of three different release exercises on hamstring flexibility, in participants with short hamstrings. METHODS: Totally, 20 subjects having short hamstrings were involved in this study. The inclusion criterion for study participation was active knee extension test (AKET) less than 60°. All participants were subjected to 3 methods: hamstring foam roller release (HFRR), sitting self myofascial release (sitting SMR), and standing self myofascial release (Standing SMR). All participants randomly performed all three methods to avoid bias caused by learning or fatigue. Passive knee extension test (PKET), AKET, finger to floor distance test (FTFT), and pelvic tilting angle test (PTAT) were measured pre- and post-exercises. RESULTS: The PKET, AKET and FTFT were significantly increased after HFRR, sitting SMR, and standing SMR exercise (p < .05). However, PTAT was not significantly increased after the three exercises (p > .05). Furthermore, no significant differences were observed between PKET, AKET, FTFT and PTAT subsequent to HFRR, sitting SMR, and standing SMR (p > .05). CONCLUSION: Our results indicate that HFRR, sitting SMR and standing SMR were immediately effective in improving hamstring flexibility in participants with short hamstrings.

뒤넙다리근의 자가 신장운동 방법에 따른 유연성과 근탄성의 변화

박소라,노효련 대한물리의학회 2023 대한물리의학회지 Vol.18 No.4

PURPOSE: The purpose of this study was to investigate the changes in the flexibility and elasticity of the muscles when the hamstrings were stretched in one direction and when they were stretched in three directions. METHODS: In this study the subjects were divided into two groups, namely the ‘one-direction stretching exercise of the hamstring muscle in the neutral position’ group (female: 14 people, male: 14 people) and the ‘three-way stretching exercise’ group (female: 12 people, male: 14 people) considering the positions of the three hamstring muscles. The elasticity and flexibility of the hamstring muscles were measured before and after the self-extension exercise, and the average value of two measurements was noted. To evaluate the flexibility of the hamstring muscle, a ‘sit and reach’ test was performed, and muscle elasticity was measured using the MyotonPRO® device. RESULTS: After the stretching exercise, flexibility increased in both groups. In terms of muscle elasticity, the body dynamic strength and resonance frequency of the stretching one-direction stretching group decreased after the stretching exercise. CONCLUSION: To alter the muscle characteristics and increase the flexibility when performing a stretching exercise, selecting and stretching only one muscle with the lowest range of motion yields effective results. The ideal technique to be employed appears to be to stretch the entire hamstring muscle in one direction from the neutral position.

Effect of High-frequency Diathermy on Hamstring Tightness

Ye Jin Kim,Joo-Hee Park,Ji-hyun Kim,Gyeong Ah Moon,Hye-Seon Jeon 한국전문물리치료학회 2021 한국전문물리치료학회지 Vol.28 No.1

Background: The hamstring is a muscle that crosses two joints, that is the hip and knee, and its flexibility is an important indicator of physical health in its role in many activities of daily living such as sitting, walking, and running. Limited range of motion (ROM) due to hamstring tightness is strongly related to back pain and malfunction of the hip joint. High-frequency diathermy (HFD) therapy is known to be effective in relaxing the muscle and increasing ROM. Objects: To investigate the effects of HFD on active knee extension ROM and hamstring tone and stiffness in participants with hamstring tightness. Methods: Twenty-four participants with hamstring tightness were recruited, and the operational definition of hamstring tightness in this study was active knee extension ROM of below 160° at 90° hip flexion in the supine position. HFD was applied to the hamstring for 15 minutes using the WINBACK device. All participants were examined before and after the intervention, and the results were analyzed using a paired t-test. The outcome measures included knee extension ROM, the viscoelastic property of the hamstring, and peak torque for passive knee extension. Results: The active knee extension ROM significantly increased from 138.8° ± 9.9° (mean ± standard deviation) to 143.9° ± 10.4° after the intervention (p < 0.05), while viscoelastic property of the hamstring significantly decreased (p < 0.05). Also, the peak torque for knee extension significantly decreased (p < 0.05). Conclusion: Application of HFD for 15 minutes to tight hamstrings immediately improves the active ROM and reduces the tone, stiffness, and elasticity of the muscle. However, further experiments are required to examine the long-term effects of HFD on hamstring tightness including pain reduction, postural improvement around the pelvis and lower extremities, and enhanced functional movement.

족저근막 스트레칭이 척추기립근 및 슬굴곡근의 긴장도에 미치는 영향

신동재 ( Dong Jae Shin ),신현대 ( Hyun Dae Shin ),정석희 ( Seok Hee Chung ) 한방재활의학과학회 2005 한방재활의학과학회지 Vol.15 No.4

Objectives : The meridian muscle theory is similar to the myofascial meridian theory. According to the myofascial meridian theory, muscle tension can travel from one part of the body to the other part though the fascia. We assumed that the same theory can be applied to the meridian muscle. So we hypothesize that stretching of plantar fascia, a part of Chok-t`aeyang meridian muscle, will effect the tension of erector spinae muscle and hamstring muscle which is the other part of Chok-t`aeyang meridian muscle. Methods : 30 persons with neither spinal disorder nor back pain were randomized into two groups : 16 samples and 14 controls. Every person measured finger-to-floor method(FFM) distance, C7-S1 process distance, and left and right passive leg straight raising(SLR) angle. In the sample group, plantar fascia was stretched for 5 minites. In the control group, plantar fascia was not stretched. 5 minutes later, every person had taken a measurement as previously measured. Results : In the both sample and control group, muscle tension of erector spinae muscle and left and right hamstring muscle had significantly decreased. And in the sample group, muscle tension of erector spinae muscle and left and right hamstring muscle had more significantly decreased than in the control group. Conclusions : Muscle tension can travel from one part of the body to the other part of the body though the meridian muscle.

교각운동과 골반후방경사운동 시 엉덩관절 벌림 각도가 허리통증환자의 뒤넙다리근의 근활성도에 미치는 영향

김세윤,김난수 대한스포츠물리치료학회 2021 정형스포츠물리치료학회지 Vol.17 No.2

Purpose: Low back pain, a common musculoskeletal disorder, is impacted by shortening of the hamstring. Lumbar stabilization exercises are frequently used to treat low back pain. Therefore, this study aimed toinvestigate the effects of hip abduction angle on medial and lateral hamstring muscle activity during bridgeexercise and pelvic posterior tilting exercise. Methods: Thirty-six individuals with herniated intervertebral disk (HIVD) participated in this study. All subjectsperformed the bridge exercise and pelvic posterior tilting exercise for twelve seconds. While the participantsmaintained these exercise positions, hamstring muscle activation was measured for each leg. Specifically,dynamic surface electromyography was utilized to compare muscle activity for the biceps femoris and thesemitendinosus muscle groups in both affected and non-affected hamstrings. An independent t-test was usedto identify the impact of exercise type or symptom presentation on hamstring muscle activity. The data wasanalyzed using PASW Statistics 18.0 (SPSS Inc, USA). Results: Overall, our results indicated that there was no significant difference in hamstring muscle activationas a consequence of exercise type (p>0.05). This result was observed regardless of the hip joint abductionangle (0° and 30°). However, when participants conducted the bridge exercise while in the hip joint 0°abduction position, muscle activation of both the biceps femoris and the semitendinosus was significantlylower on the affected side than that on the non-affected side (p<0.05). Conclusion: Consequently, performing bridge exercise and pelvic posterior tilting exercises with abducted hipjoints may be helpful in the balanced development of the hamstring.

Effects of Robot-assisted Gait With Body Weight Support on Torque, Work, and Power of Quadriceps and Hamstring Muscles in Healthy Subjects

Jihun Hwang,Sung (Joshua) Hyun You,Woochol Joseph Choi,Chung-hwi Yi 한국전문물리치료학회 2021 한국전문물리치료학회지 Vol.28 No.3

Background: Robot-assisted gait training (RAGT) is an effective method for walking reha-bilitation. Additionally, the body weight support (BWS) system reduces muscle fatigue while walking. However, no previous studies have investigated the effects of RAGT with BWS on isokinetic strength of quadriceps and hamstring muscles. Objects: The purpose of this study was to investigate the effects of torque, work, and power on the quadriceps and hamstring muscles during RAGT, using the BWS of three conditions in healthy subjects. The three different BWS conditions were BWS 50%, BWS 20%, and full weight bearing (FWB). Methods: Eleven healthy subjects (7 males and 4 females) participated in this study. The Walkbot_S was used to cause fatigue of the quadriceps and hamstring muscles and the Biodex Systems 4 Pro was used to measure the isokinetic torque, work, and power of them. After RAGT trials of each of the three conditions, the subjects performed isokinetic concentric knee flexion and extension, five at an angular velocity of 60°/s and fifteen at an angular velocity of 180°/s. One-way repeated analysis of variance was used to determine significant differences in all the variables. The least significant difference test was used for post-hoc analysis. Results: On both sides, there were significant differences in peak torque (PT) of knee exten-sion and flexion between the three BWS conditions at an angular velocity of 60°/s and 180°/s conditions. A post-hoc comparison revealed that the PT in the BWS 50% was significantly greater than in the BWS 20% and the FWB and the PT in the BWS 20% was significantly greater than in the FWB. Conclusion: The results of this study suggest that the lower BWS during RAGT seems to lower the isokinetic torque, work, and power of the quadriceps and hamstring muscles be-cause of the muscle fatigue increase.

Immediate Effects of Release Ball Massage and Self-stretching Exercise on Hamstring's Temperature, Range of Motion and Strength in 20's Women

Jeong, Younghun,Park, Jihwan,Yu, Jin,Lee, Sunyeong,Ha, Jihee,Choo, Yeonki,Oh, Taeyoung International Academy of Physical Therapy Research 2019 Journal of International Academy of Physical Ther Vol.10 No.1

Background: There have been many studies on self-myofascial release (SMR) stretching, but there are few comparative studies on the effects of massages using a release ball, which is a type of the SMR method. Objective: To investigate the immediate effects of release ball massage and self-stretching on proprioceptive sensory, hamstring's temperature, range of motion (ROM) muscle strength,. Design: Crossover study. Methods: Thirty women in 20's at S University in Busan voluntarily participated in the study. Participants were random to release ball group (n=15) or self-stretching group (n=15). Both groups performed 3 sets of exercises, stretching for 30 seconds and resting for 15 seconds in each position. The proprioceptive sensory, temperature of the hamstring muscle, ROM, and strength were measured before exercise, 5 minutes after exercise, and 30 minutes after exercise. Results: Release ball group showed significant differences in muscle length and temperature over time (p<.05). The comparison between two group over time showed significant differences in muscle length, temperature, and muscle strength (p<.05). Conclusions: These results demonstrate that release ball massage and self-stretching are beneficial for improving hamstring's temperature, ROM and muscle strength.

Immediate Effect of Hip Hinge Exercise Stretching on Flexibility of Lower Limb, Pelvic Tilting Angle, Proprioception and Dynamic Balance in Individual with Hamstring Tightness

Myeongeun Jung,Namwoo Kim,이용우 물리치료재활과학회 2022 Physical therapy rehabilitation science Vol.11 No.2

Objective: The purpose of this study was to measure the immediate effect of hip hinge exercise stretching on hamstring flexibility, pelvic tilting angle, proprioception, and dynamic balance in individual with tightness of the hamstring. Design: A randomized controlled trial. Methods: A total of 35 healthy young adults (27 males, 8 females) volunteered for this study and randomly divided into three groups (Hip hinge exercise stretching group, passive stretching group, and PNF stretching group). The hamstring flexibility, pelvic tilting angle, knee joint proprioception, dynamic balance was conducted for 3 times. In order to evaluate the hamstring flexibility, the active knee extension test was performed. Forward bending test was performed to examine pelvic tilting angle.The proprioception was tested by the joint position sense test and dynamic balance was evaluated by Y balance test. Results: The hamstring flexibility, pelvic tilting angle and dynamic balance were significantly improved between three groups before and after intervention (p<0.05). Dynamic balance was significantly difference between the three groups in the posterolateral direction (p<0.06). Conclusions: This study result showed that hip hinge exercise stretching was the most effective method for increasing hamstring flexibility, pelvic tilting angle and dynamic balance. In addition, it is necessary to study whether hamstring stretching is effective in low back pain patient with hamstrings tightness.