共查询到20条相似文献,搜索用时 15 毫秒
1.
Jeheon Moon Insik Shin Myoungsoo Kang Yeonghun Kim Kunwoo Lee Jaewoo Park Kyungnam Kim Daehie Hong Dohoon Koo David O'sullivan 《Journal of Physical Therapy Science》2013,25(10):1299-1301
The purpose of this study was to investigate the differences in muscle activation
patterns of the biceps brachii (BB) and flexor carpi radialis (FCR) muscles, while
measuring the resultant force (RF) at different shoulder flexion angles. [Subjects]
Thirteen healthy males (age 24.85±3.4 years, weight; 77.8±7.9 kg; height, 1.7±0.05 m) were
enrolled in this study. [Methods] The resultant force was measured by a force transducer .
The elbow angle remained constant and the flexion shoulder angle was changed (30°, 45°,
60°, 75° and 90°). [Results] The results of the surface EMG show the largest muscle
activities occurred at a shoulder flexion of 75° for BB and 90° for FCR. The largest
resultant force was measured at a shoulder flexion angle of 75°. We conclude, that when
performing the biceps curl exercise using an arm curl machine, the shoulder should be
flexed at 75° to maximize the focus of the exercise for the BB. [Conclusion] These results
are useful from the perspective of design as they highlight the differences in the muscle
activation of BB and FCR with postural change. Ultimately this knowledge can be used in
the design of rehabilitation training for the shoulder as they show that posture can
affect muscle activation. 相似文献
2.
Jun-Seok Kim Min-Hyeok Kang Ji-Won Kim Dong-Kyu Lee Tae-Hyung Yoon Jae-Seop Oh 《Journal of Physical Therapy Science》2014,26(8):1223-1224
[Purpose] This study compared the effects of three exercises performed in a prone
position on the selective activation of the lumbar erector spinae (LES) and lumbar
multifidus (LM) muscles in healthy males to investigate the effective method for selective
activation of the LM. [Subjects] Twenty-two healthy males were recruited. Surface EMG data
were collected from the right LES and LM muscles during three exercises: 1) trunk
extension, 2) hip extension, and 3) the arm lift. [Results] The ratio of LM to LES EMG
activity during hip extension was higher than those during trunk extension and the arm
lift. [Conclusion] Hip extension in a prone position may be effective for selective
activation of the lumbar multifidus muscles in healthy males.Key words: Lumbar erector spinae, Lumbar multifidus, Selective activation 相似文献
3.
Jae Yun Cha Doo Chul Shin Seung Ho Shin Myung Mo Lee Kyoung Jin Lee Chang Ho Song 《Journal of Physical Therapy Science》2014,26(5):749-751
[Purpose] This study examined the relationship between core stability and exercise
intensity during a pulley-based shoulder exercise (PBSE) on an unstable support surface.
[Subjects] Twenty healthy college students enrolled in this study. [Methods] Surface EMG
was carried out in twenty healthy adult men. The electromyographic activities of the
rectus abdominis (RA), erector spinae (ES), exercises with 14 kg or 26 kg of resistance
and external oblique (EO) muscles during pulley-based shoulder on an unstable support
surface (USS) were compared. [Results] The EMG signals of the RA, ES, and EO did not
increase with increasing exercise resistance. [Conclusion] Increasing the exercise
intensity to increase the core stability during PBSE on a USS may be ineffective.Key words: Electromyography, Core stability, Ankle strategy 相似文献
4.
[Purpose] We investigated the effects of unstable conditions on the electromyographic
(EMG) activity of the rectus abdominis (RA) and the transverse abdominis–internal oblique
(TrA-IO) muscles, and lumbar kinematics during unilateral upper-limb resistance exercises
using elastic tubing bands. [Subjects] Twelve healthy males were recruited. [Methods] The
subjects performed isometric left shoulder abduction using an elastic tubing band in a
sitting position on a chair, and on a Swiss ball. During this exercise, EMG activities of
the RA and TrA-IO were recorded using a wireless EMG system, and a three-dimensional
motion analysis system monitored lumbar kinematics. Differences in EMG activities of the
RA and TrA-IO, the ratio of TrA-IO to RA activity, and lumbar kinematics were compared
between the stable and unstable conditions using the paired t-test.
[Results] Under the unstable condition, the EMG activities of both muscles were
significantly greater than that under the stable condition; however the ratio of TrA-IO to
RA activity did not significantly differ between the conditions. The lumbar angle
significantly differed only in the coronal plane. [Conclusions] These findings indicate
that trunk posture should be considered when performing exercises under unstable
conditions.Key words: Swiss ball, Abdominal muscles, Electromyography 相似文献
5.
[Purpose] The purpose of this study was to investigate the effect of the shoulder flexionangle on the muscle activities of the upper extremities when performing the push-up plusexercise (PUPE) on an unstable surface with the forearm in the external rotation position.[Subjects] The subjects were conducted on 15 normal male adults. [Methods] A sling devicewas used for the unstable surface, and PUPE was performed with the forearm in the externalrotation position. The shoulder flexion angles measured in the sagittal plane were 110°,90°, and 70°. Electromyography was used for a comparitive analysis of the muscleactivities of the serratus anterior (SA), the pectoralis major (PM), and the uppertrapezius (UT). [Results] In the intra-group comparison, the muscle activity of SA wasstatistically the highest when the shoulder-flexion angle was 110°. [Conclusion]performing PUPE on an unstable surface, the muscle activity of the SA is activated themost when the shoulder flexion angle is 110° and the forearm is in the external rotationposition. 相似文献
6.
7.
Min-Hyeok Kang Jae-Seop Oh Byung-Joo Park Tae-Hoon Kim 《Journal of Physical Therapy Science》2013,25(12):1537-1539
[Purpose] The purpose of this study was to compare the lumbar flexion angle and
electromyography (EMG) measurements of trunk muscle activity in individuals with and
without limited hip flexion range of motion (ROM) during visual display terminal (VDT)
work with cross-legged sitting. [Subjects] The 15 participants included a control group
with sufficient hip flexion ROM (n = 7) and an experimental group with limited hip flexion
ROM (n = 8). [Methods] All subjects performed VDT work with cross-legged sitting. The
lumbar flexion angle was measured using a three-dimensional motion capture system, and the
trunk muscle activity was recorded using a surface EMG system during VDT work with
cross-legged sitting. The differences in trunk flexion angle and trunk muscle activity
between the two groups were analyzed using independent t-tests. [Results] The lumbar
flexion angle was significantly greater in the experimental group than the control group,
although trunk muscle activity did not differ between the two groups. [Conclusion] These
findings suggest that limited hip flexion leads to greater lumbar flexion during
cross-legged sitting.Key words: Cross-legged sitting, Electromyography, Lumbar flexion 相似文献
8.
Chung Yoo Kim In Bae Kim Jong Ho Kang Eun Kyung Kim 《Journal of Physical Therapy Science》2014,26(10):1615-1617
[Purpose] The purpose of this study was to propose a table height that can reduce
shoulder muscle fatigue by analyzing and comparing median frequencies of shoulder muscles
at different table heights when performing therapeutic ultrasounds work. [Subjects and
Methods] The subjects were 63 healthy male adults who were equally and randomly assigned
to a standard height group (SHG), a high height group (HHG), and a low height group (LHG).
The standard table height was set at the level of the elbow joint when the subjects flexed
their elbow while in a sitting position. High height and low height were set 10 cm higher
and 10 cm lower, respectively, than the standard height. Muscle fatigue of the upper
trapezius, middle deltoid, rhomboid, and infraspinatus of the subjects was measured during
ultrasound treatment work at each table height. [Results] Median frequencies of the upper
trapezius, middle deltoid, rhomboid, and infraspinatus muscles were significantly lower in
the HHG than in to the LHG. [Conclusion] When therapeutic ultrasound is performed using a
table that has a height lower than that of the elbow joint, the median frequency of the
shoulder muscle increases, hence decreasing muscle fatigue. This way, musculoskeletal pain
as a result of performing therapeutic ultrasound can be prevented.Key words: Therapeutic ultrasound, Work environment, Table height 相似文献
9.
[Purpose] The purpose of the present study was to examine the effects of cervical
stabilization exercises on the electromyographic activity of the shoulder stabilizers in
normal adults. [Subjects] In the present study, 20 normal adults were divided into an
experimental group (EG, n=10) that performed cervical stabilization exercises and shoulder
stabilization exercises and a control group (CG, n=10) that performed shoulder
stabilization exercises. [Methods] The EG and CG performed their exercises three times per
week for four weeks. The cervical stabilization exercises consisted of Craniocervical
flexion exercises (CCFEs) that were performed using pressure biofeedback units (PBUs). The
shoulder stabilization exercises consisted of scapula-setting exercises, wall stretching,
and external rotation exercises. To examine the electromyographic activity of the upper
trapezius (UT) muscle, lower trapezius (LT) muscle, and serratus anterior (SA) muscle, the
electromyograms for these muscles were compared and analyzed. [Results] In comparisons
within the groups, the EG showed statistically significant differences in the UT, the LT
and the SA. The CG did not show any significant differences. [Conclusion] Cervical
stabilization exercises and shoulder stabilization exercises are considered to be an
effective intervention for the electromyographic activity of the shoulder stabilizers, the
UT, LT, and SA.Key words: Cervical stabilization, Stabilizer, Electromyographic activity 相似文献
10.
Dong-hyun Kang So-young Jung Dong-hun Nam Seung-je Shin Won-gyu Yoo 《Journal of Physical Therapy Science》2014,26(6):909-910
[Purpose] The purpose of this study was to compare the activity of the shoulder and
trunk muscles in two push-up positions: standard push-ups and push-ups with the trunk
flexed. [Subjects] Fifteen young adult males participated in the study. [Methods] This
study measured the clavicular and sternocostal portions of the pectoralis major, the
serratus anterior, and the rectus abdominis during push-ups under the two conditions.
[Results] The activity of the sternocostal portion of the pectoralis major and that of the
rectus abdominis were significantly greater under Condition 1 than under Condition 2. The
activity of the clavicular portion of the pectoralis major and that of the serratus
anterior were significantly greater under Condition 2 compared with Condition 1.
[Conclusion] These results indicate that exercises can selectively activate muscle parts
under different clinical situations.Key words: Electromyography, Push-up, Selective muscle activation 相似文献
11.
[Purpose] The purpose of this study was to measure the cervical flexion-relaxation ratio
(FRR) and intensity of neck pain and identify the differences according to postures
adopted while using smartphones. [Subjects] Fifteen healthy adults with no neck pain,
spinal trauma, or history cervical surgery participated in this study. [Methods] The
activity of the cervical erector spinae muscle was recorded while performing a
standardized cervical flexion-extension movement in three phases (flexion, sustained full
flexion, extension). And neck pain intensity was recorded using a visual analog scale
(VAS) with values between 0 and 10. Postures held while using a smartphone are
distinguished between desk postures and lap postures. The FRR was calculated by dividing
the maximal muscle activation during the extension phase by average activation during the
complete flexion phase. [Results] No significant differences were found in the FRR between
desk posture, lap posture, and baseline, though the intensity of the neck pain increased
in the lap posture. [Conclusion] The FRR could be a significant criterion of neuromuscular
impairment in chronic neck pain or lumbar pain patients, but it is impossible to
distinguish neck pain that is caused by performing task for a short time. Prolonged lap
posture might cause neck pain, so the use of smartphones for a long time in this posture
should be avoided.Key words: Smartphone, Cervical flexion-relaxation ratio, Electromyography 相似文献
12.
Su-kyoung Lee 《Journal of Physical Therapy Science》2013,25(11):1407-1409
[Purpose] The present study compared the muscle activity of the upper trapezius with
those of the serratus anterior and the lower trapezius when slings, unstable surfaces,
were laterally vibrated, to examine the effects of vibration during sling exercises on
shoulder stabilization muscles. [Methods] The subjects performed push-up exercises on a
sling and maintained isometric contraction in the final stage, while vibration was
manually administered to the rope of the sling during the isometric-contraction stage.
Vibration within a range of 10 cm was delivered for five seconds at a frequency of 1 Hz in
time with a metronome. Vibrations were applied for five seconds at 3 Hz and 3.5 Hz,
respectively. [Results] The serratus anterior showed a significant differences between
isometric contraction with vibration of 3 Hz and isometric contraction with vibration of
3.5 Hz. [Conclusion] The upper trapezius and the lower trapezius showed prominent changes
in muscle activity at 3.5 Hz, and the serratus anterior showed prominent changes in muscle
activity at 3 Hz and 3.5 Hz. Therefore, as vibration frequency increased, making the
load-bearing surface more unstable, the recruitment of the upper trapezius, the lower
trapezius, and the serratus anterior increased. To perform exercises that selectively
strengthen the serratus anterior, the exercises should be performed at a vibration
frequency of 3 Hz.Key words: Vibration, Shoulder joint, Muscle activity 相似文献
13.
[Purpose] The purpose of this study was to identify the effects of squat exercises
performed in toilet-using postures on the blood flow velocity of the lower extremities for
the prevention of deep vein thrombosis. [Subjects] The subjects were 28 students who were
attending B University in Cheonan. They were divided into a group of 14 subjects of
sitting toilet users and a group of 14 subjects of squat toilet users. [Methods] The
subjects performed squat exercises in different toilet-using postures and we investigated
the changes in blood flow velocity. [Results] The variations in blood flow velocities
before and after the exercises showed significant differences in both groups but the
differences between the two groups were not significant. [Conclusion] Based on the results
of this study, we consider squat exercises are effective at improving the variation in
lower-extremity blood flow velocity when using a toilet.Key words: Blood flow velocity, Squat exercises, Toilet-using postures 相似文献
14.
Ji Kyeng Jeon Hee Sung Lim Sung Rae Shin Bo Hyun Kim Suk Min Lee 《Journal of Physical Therapy Science》2013,25(7):853-856
[Purpose] This study investigated the muscle activity differences of three different
lumbar stabilization exercises in a comparison of middle-aged and young women. [Subjects]
Seventeen middle-aged women and fifteen young women were enrolled in this study. Patients
with a history of any neurologic disorders, orthopedic disorders, or cardiopulmonary
problems that would have affected their lumbar stabilization exercise performance were
excluded. [Methods] All subjects performed 3 exercises while the surface electromographic
activity was recorded of the rectus abdominis, internal oblique, multifidus, and
iliocostalis lumbolum. The mean electromyographic amplitudes obtained during the exercise
were normalized to the amplitude of maximal voluntary isometric contraction (%MVIC) to
produce an inter-individually comparable muscle activity index. [Results] The highest
muscle activity of middle-aged women was observed in the ring bridging exercise. The
middle-aged women had higher levels of all muscle activaties than the young women,
particularly in the multifidus muscle and iliocostalis lumborum. No significant difference
in muscle activity ratio was observed between the local muscles and global muscles in the
three different exercises, though the muscle activity ratio was the highest in the ring
bridging exercise. The young women group showed a higher ratio of the internal
oblique/rectus abdominus than the middle aged women in the bridging exercise. [Conclusion]
The ring bridging exercise should be used for stabilizing the lumbar area because the
young women showed a higher ratio than the middle aged women.Key words: Bridging exercise, Middle-aged women, Muscle activity 相似文献
15.
[Purpose] The purpose of this study was to examine the effects of the flexion angle of
the knee joint and the abduction angle of the hip joint on the activation of the cervical
region and abdominal muscles. [Subjects] A total of 42 subjects were enrolled 9 males and
33 females. [Methods] The bridging exercise in this study was one form of exercise with a
knee joint flexion angle of 90°. Based on this, a bridging exercise was conducted at the
postures of abduction of the lower extremities at 0, 5, 10, and 15°. [Result] The changes
in the knee joint angle and the hip abduction angle exhibited statistically significant
effects on the cervical erector spinae, adductor magnus, and gluteus medius muscles. The
abduction angles did not result in statistically significant effects on the upper
trapezium, erector spinae, external oblique, and rectus abdominis muscles. However, in
relation to the knee joint angles, during the bridging exercise, statistically significant
results were exhibited. [Conclusion] When patients with both cervical and back pain do a
bridging exercise, widening the knee joint angle would reduce cervical and shoulder muscle
activity through minimal levels of abduction, permitting trunk muscle strengthening with
reduced cervical muscle activity. This method would be helpful for strengthening trunk
muscles in a selective manner.Key words: Bridging exercise, Knee and hip joint angle, Muscle activation 相似文献
16.
Igsoo Cho Gak Hwangbo Daehee Lee Sangyong Lee 《Journal of Physical Therapy Science》2014,26(9):1481-1484
[Purpose] The purpose of this study was to examine the effects of closed kinetic chain
exercises (CKCEs) and open kinetic chain exercises (OKCEs) with elastic bands on the
electromyographic activity of patients with degenerative gonarthritis. [Subjects] The
study subjects were 30 degenerative gonarthritis patients who were divided into a CKCE
group (CKCEG, n=10), an OKCE group (OKCEG, n=10), and a control group (CG, n=10).
[Methods] The CKCEG and the OKCEG performed exercises with elastic bands, and the CG took
part in a quadriceps strengthening exercise. All three groups performed the exercises
three times per week for four weeks. The electromyographic activities of the subjects’
vastus medialis (VM), rectus femoris (RF), vastus lateralis (VL), semitendinosus (ST), and
biceps femoris (BF) muscles were measured and compared. [Results] Within-group comparisons
revealed that the electromyographic activities of the VM, RF, VL, ST, and BF muscles
increased significantly in the CKCEG. The OKCEG displayed significant increases in the
electromyographic activity of the VM, RF, ST, and BF muscles, and the CG showed
significant increases in the electromyographic activities of the RF, VL, ST, and BF
muscles. In between-group comparisons after the intervention, the electromyographic
activities of the VM, RF, and VL muscles of the CKCEG were significantly higher than those
of the CG. The electromyographic activities of the VM, RF, and ST muscles of the OKCEG
were significantly higher than those of the CG. [Conclusion] We consider CKCEs with
elastic bands are an effective intervention for increasing the electromyographic
activities of the VM, RF, VL, ST, and BF muscles of degenerative gonarthritis patients,
and OKCEs with elastic bands are an effective intervention for increasing the
electromyographic activities of the VM, RF, ST, and BF muscles of degenerative
gonarthritis patients. 相似文献
17.
This study was conducted to identify the effects of a fall-prevention exercise program on
the participation and static balance of elderly persons in daily life roles. [Subjects]
Ten participants over 65 years of age (75.29±2.93) who were healthy community-dwellers
(two men and eight women) were recruited. [Methods] The participants exercised three times
a week for eight weeks. The exercise program was based on the fitness and mobility
exercise (FAME) protocol. The outcome measures were changes in activity participation
level and the fall index. [Results] After the exercise, the activity participation level
significantly increased, and the fall index significantly decreased. [Conclusion] A fall
prevention exercise program can have a positive effect on participation and static balance
in older adults.Key words: Exercise, Fall, Participation 相似文献
18.
Won-gyu Yoo 《Journal of Physical Therapy Science》2014,26(5):645-646
[Purpose] This study assessed the use of different exercise speeds and isokinetic
feedback on the middle and lower serratus anterior muscles during push-up exercises.
[Subjects] Ten male workers voluntarily consented to participate in the study. [Methods]
The subjects performed push-up exercises under three conditions. Surface electrodes were
placed on the dominant right side of the middle and lower serratus anterior muscles.
[Results] The middle and lower SA muscle activities under condition 2 were significantly
decreased when compared with those under conditions 1 and 3. The middle SA activity under
condition 3 was significantly increased when compared with that under condition 1.
[Conclusion] This study suggests that proper selection of push-up exercise speed may be
necessary for selective strengthening of the SA and that isokinetic feedback information
obtained using an accelerator can help in selective strengthening of the middle SA.Key words: Accelerator, Isokinetic feedback, Middle SA 相似文献
19.
[Purpose] This study examined the effects of different weight-bearing postures on the
activation of the abductor hallucis muscle during foot-arch exercises. [Subjects] The
study recruited 11 healthy volunteers who were pain-free, had no history of foot or ankle
surgery, and were able to maintain a standing posture. [Methods] The subjects performed
short-foot and toe-spreading exercises while sitting and standing. [Results] The abductor
hallucis muscle activation in the toe-spreading exercise was significantly greater when
standing than in sitting, while that in the short-foot exercise did not differ
significantly between the two postures. [Conclusion] The results of this study suggests
that a weight bearing posture such as standing is the most effective method of increasing
the EMG activity of abductor hallucis muscle in the toe-spreading exercise.Key words: Short foot exercise, Toe spreading exercise, Weight bearing 相似文献
20.
[Purpose] The purpose of this study was to determine the effect of ground
tilt on the lower extremity muscle activity of stroke patients performing squat exercises.
[Subjects] Fifteen hemiparetic patients volunteered to participate in this study.
[Methods] The subjects performed squat exercises at three different ground tilt angles:
15° plantar flexion, a neutral position, and 15° dorsiflexion. A surface electromyogram
(sEMG) was used to record the electromyographic activities of the leg extensor muscle in
the vastus lateralis (VL), vastus medialis (VM), gastrocnemius lateralis (GL), and
gastrocnemius medialis (GM). The sEMG activity was analyzed using a one-way repeated
measures ANOVA and a post hoc Bonferroni correction. [Results] The results of this study
are summarized as follows. Significant differences were noted for the VL and the GL when
the angle of the ankle joint was between the 15° plantar flexion and neutral positions
during squat exercises involving the VL and when the angle of the ankle joint was between
the neutral position and 15° dorsiflexion during squat exercises involving the VM.
[Conclusion] In this study, sEMG showed that the VL and GL changed significantly during
squat exercises according to the ground tilt angle of hemiparetic patients. Therefore,
squat exercises with different ground tilt angles can be used to improve VL and GL
strength.Key words: Electromyogram, Hemiplegic patient, Squat exercises 相似文献