• Journal of the Korean Society of Physical Medicine
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• v.10 no.2
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• pp.63-71
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• 2015

PURPOSE: The purpose of this study to investigate the effects of exercise on lumbar stabilization in muscle activity and isokinetic muscle strength of female with chronic low back pain. METHODS: The candidates was chose to twenty women in their 30s and 40s complaining back pain for over 12 weeks and consist of 10 people for lumbar stabilization and general physical therapy group(PL group), another 10 people for general physical therapy group(GP group). Lumbar stabilization exercise was conducted for 8 weeks and was comprised of 60 minutes for two times a week. In order to examine the effects of lumbar stabilization, results in the present study were analyzed maximal voluntary isometric contraction (MVIC) using electromyogram to measure muscle activity and isokinetic performance including peak torque and average power at the pre to post. RESULTS: The following are results in this study. The MVIC and isokinetic muscle strength were gradually increased in all group. As the result of the test of the MVIC and isokinetic muscle strength, the difference of lumbar stabilization and general physical therapy group is statistically more significant than that of general physical therapy group. CONCLUSION: In the present study, results indicate that lumbar stabilization helps to improve the muscle activity and isokinetic muscle strength.

• The Journal of Korean Physical Therapy
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• v.32 no.6
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• pp.325-328
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• 2020

Purpose: This study examined the effects of the directions of neck rotation position on the muscle activity and strength of the elbow flexor and extensor muscle. Methods: Forty-one healthy adults participated in this study. The subjects were asked to their elbow 90° flexion in three different neck rotations (neutral, ipsilateral, and contralateral) in the sitting position. The muscle activities of the biceps and triceps brachii muscle were measured using surface electromyography. And the muscle strength of the elbow flexor was measured using dynamometer. One way repeated measures ANOVA was used to compare the muscle activity and strength of the elbow flexor and extensor depending on the different neck turning directions. Results: There were significant differences between contralateral neck rotation and ipsilateral neck rotation, contralateral neck rotation and neutral position. But, there was no significant difference in the triceps brachii muscle activity in comparison with the neck rotation. There were significant differences between contralateral neck rotation and ipsilateral neck rotation, contralateral neck rotation and neutral position. Conclusion: To summarize this study, the elbow flexor and extensor muscle activity and strength was highest in the contralateral neck rotation position. In other words, it was possible to confirm the effect of Asymmetrical Tonic Neck Reflex in healthy adults whose primitive reflexes were inhibition, and head and neck positions should be considered during clinical evaluation and treatment.

• Journal of the Korean Society of Physical Medicine
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• v.16 no.1
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• pp.103-109
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• 2021

PURPOSE: This study examined the effects of the Visual Analog Scale (VAS) and knee function index on the knee strength and endurance in the national male field-hockey athletes. METHODS: Twenty-four male field-hockey athletes with a painful knee who trained at the national training center in 2019 were enrolled. The VAS and knee function index questionnaire were used to evaluate the degree of pain and functional state of the knee. The muscle strength and endurance of the knee were measured by Biodex (System 4, USA). The Pearson product moment correlation was performed to examine the effects of the VAS and knee function index the of knee on the strength and endurance. In addition, the VAS and knee function index and muscle strength and muscle endurance were examined to determine the relationship using Simple Linear Regression. The statistical significance level was α=.05. RESULTS: An analysis of the correlation between VAS and knee function index and muscle strength and muscle endurance revealed the VAS and knee function index to be statistically significant (r = .700). In addition, the extensor muscle strength, knee VAS (r = -.457), and knee function index (r = -.414) were also statistically significant. A 1-point increase in the VAS and knee function index was associated with an approximately 9.881 and 1.006 extensor muscle strength. CONCLUSION: The VAS and knee function index of field-hockey athletes are related to the strength of the knee extensors. Therefore, field-hockey athletes should develop a program to strengthen the extensor muscle strength of the knee.

• Journal of muscle and joint health
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• v.15 no.2
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• pp.130-139
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• 2008

Purpose: The purpose of this study was to examine the effect of Tai Chi exercise on muscle strength, grip strength, flexibility, pain, depression and self-efficacy in patients with osteoarthritis. Method: With a quasi-experimental design, 46 persons with osteoarthritis were assigned into an experimental group (n=22) or a control group (n=24). Muscle strength, grip strength, flexibility, pain, depression and self-efficacy were measured both before and after the exercise. Data were analyzed with SPSS WIN using descriptive statistics, t-test, and ANCOVA. Results: The mean age of the subjects was 68 years in the experimental group and 64 years in the control group. After controlling for age and pre-test outcome variables, muscle strength scores (F=-14.8, p= .00), grip strength scores (Rt: F=8.40, p= .01), and self-efficacy (F=47.3, p= .00) improved more in the experimental group than the control group. Joint pain scores (F=15.0, p= .00) and depression scores (F=14.7, p= .00) decreased in the experimental group. Conclusion: Tai Chi exercise is likely to be an effective nursing intervention to improve muscle strength, grip strength, and self-efficacy and reduce pain and depression for patients with osteoarthritis.

• The Journal of Korean Academy of Orthopedic Manual Physical Therapy
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• v.25 no.1
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• pp.21-27
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• 2019

Background: The purpose of this study was to investigate the effects of Graston technique for lower extremity range of motion (ROM), muscle strength, walking ability in hemiplegia patients. Methods: Twelve subjects participated in this study. The ROM of the knee extension was measured by 90-90 straight leg raise test, the hamstring and quadriceps muscle strength was collected by utilizing a handheld dynamometer. In addition walking speed was evaluated by 10 meter walking test. The group was applied intervention using a Graston instrument for one minute. After intervention, immediate effect was assessed. The significant level was set at ${\alpha}=.05$. Results: The ROM of the knee extension, quadriceps muscle strength and walking speed were significantly increased. Hamstring muscle strength was significantly reduced. Conclusion: The results of this study suggest that Graston instrument technique has the effect of instantaneously flexibility the muscles, and the muscle applied with the technique has weakened, while the muscle of the opposite side has increased the muscle strength. In addition, the muscle flexibility and the walking speed have increased.

• Journal of International Academy of Physical Therapy Research
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• v.1 no.2
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• pp.149-154
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• 2010

The purpose of this study was to investigate the effects of swiss ball exercise and taping therapy on back muscle strength on normal college students. The aim of this study was to find effective method for back muscle strengthening. Subjects of 30 college students divided 3 groups(taping therapy group: 10, swiss ball group: 10, control group: 10). All subjects inquired physical conditions and normal exercise habits for data base. Back muscle strength measured before and after 3 weeks intervention. Taping therapy was displayed stable a growth curve in continuative a growth graph of back muscle strength better than swiss ball exercise, because it was taping therapy by periodic effect. The result of this study known to effective either taping therapy or swiss ball exercise, but both taping therapy and swiss ball exercise were effect to increase in back muscle strength.

• Journal of the Korean Society of Physical Medicine
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• v.14 no.4
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• pp.173-181
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• 2019

PURPOSE: This study examined the necessity of a musculoskeletal injury-prevention program for automobile parts manufacturing workers by assessing the body composition, muscle strength, and posture according to sex and age. METHODS: Two hundred eighty-two workers (men, 218; women, 64; mean age, 38.97 years; and mean work tenure, 10.29 years) participated in this study. They completed a questionnaire on their general characteristics, excluding personal identification codes. The participants were evaluated for body composition, muscle strength, and posture using InBody, a hand dynamometer, and the Image J program through photography, respectively. An independent t-test and one-way analysis of the variance were used for the comparisons according to sex and age, respectively. RESULTS: Significant sex-related differences in muscle strength and grip force were observed (p<.05). In addition, the left-side pelvic inclination was significantly higher in the female participants than in the male participants (p<.05). Significant age-related differences in the skeletal muscle mass and muscle strength were observed around 40 years (p<.05). Significant correlations were observed among the body composition (skeletal muscle and body fat masses), muscle strength, and posture (pelvic inclination; p<.01). CONCLUSION: Significant differences in pelvic inclination by sex and muscle strength by age were found, even in healthy workers. Additional posture and muscle strength measurements will be needed for workers who participate in the musculoskeletal injury prevention program because they are exposed to an incorrect posture for many hours or in many repetitive tasks.

• The Journal of Korean Academy of Orthopedic Manual Physical Therapy
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• v.27 no.2
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• pp.1-8
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• 2021

Background: Chronic neck pain (CNP) is associated with weakness in the deep neck flexor muscles, a shortening of the neck extensors, and a reduction in endurance. In addition, muscle imbalance can lead to neck pain and musculoskeletal dysfunction. This study compared neck extensor muscle fatigue, muscle strength, and muscle endurance time between patients with CNP and healthy adults during isometric neck extension. Methods: Thirty participants (15 patients with CNP and 15 healthy adults) were recruited in this research. The outcome measures included splenius capitis (SC) muscle fatigue, isometric neck extensor strength, and muscle endurance. The independent T-test was used to compare the continuous dependent variables between the CNP group and the healthy group. Results: The independent T-test indicated that muscle fatigue in the left SC differed significantly between the CNP group and the healthy group. A significant difference was also noted in the isometric neck extensor and neck extensor strength between the groups. Conclusion: Our results provided promising clinical evidence that patients with CLP have reduced neck extensor strength and endurance and increased SC muscle fatigue, which results in neck pain.

• Journal of the Korean Society of Physical Medicine
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• v.16 no.1
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• pp.73-81
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• 2021

PURPOSE: This study examined effects of the untact trunk stabilization exercise program on muscle thickness, trunk strength, maximal expiratory flow, and static balance. METHODS: The subjects were 20 normal adults divided into 10 in the contact exercise group and 10 in the untact exercise group. The trunk stabilization exercise program was conducted for four weeks. The muscle thickness was measured using ultrasound. The maximal expiratory flow was measured using Personal Best Full Range Peak Flow Meter. The static balance was measured through Bio-rescue; and the trunk muscle strength was measured by bending the upper body forward and measuring the time for maintaining the posture. RESULTS: Both contact and untact exercise groups showed significant differences in muscle thickness, muscle strength, maximal expiratory flow, and static balance (p < .05). A significant difference in muscle thickness on ultrasound was observed between the contact and untact exercise groups (p < .05). CONCLUSION: Activation of the transverse abdominal muscle requires accurate instructions of the contact exercise, but despite environmental constraints, the untact exercise program is as effective as the contact exercise for improving muscle strength, maximum expiratory flow, and static balance.

• Journal of Korean Physical Therapy Science
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• v.24 no.3
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• pp.12-17
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• 2017

Purpose: The purpose of this study was to investigate the effects of backrest angle on lower extremity muscle strength in adult. Method: This research results are based on 10 healthy adults. 10 degree difference in pelvic angle does not effect the cross-connection of the Hamstring muscles, and created 3 types of rest with 20 degree differences each at 95, 115, and 135 degree angles. Result: significantly difference in contractibility muscle strength in accordance to the 3 rake angle. Conclusion: After putting together all these results, since both the expansibility muscle strength and contractibility muscle strength of the knee showed to be effected as the backrest angle changed during isokinetic muscle strength assessment, further research should be conducted if similar research results as this study can be acquired at various angles.