共查询到20条相似文献,搜索用时 31 毫秒
1.
Won-Gyu Yoo 《Journal of Physical Therapy Science》2015,27(9):2861-2862
[Purpose] This study investigated the effects of the slow speed-targeting squat exercise
on the vastus medialis oblique/vastus lateralis ratio. [Subjects] Ten asymptomatic men
were recruited. [Methods] The EMG activities of the vastus medialis oblique and vastus
lateralis muscles were recorded using surface electrodes. The subject performed the squat
exercise under 3 different conditions. [Results] The vastus medialis oblique/vastus
lateralis ratio in condition 2 (1.5 ± 0.7) was significantly higher than that in
conditions 1 and 3 (1.0 ± 0.5, 1.1 ± 0.8, respectively) [Conclusion] Therefore, an
effectively slow movement speed is recommended for selective strengthening of vastus
medialis oblique using a slow speed-targeting device that provides biofeedback.Key words: Slow movement speed, Squat exercise, VMO 相似文献
2.
Seol Park Yong-Soo Kong Yu-Min Ko Gwon-Uk Jang Ji-Won Park 《Journal of Physical Therapy Science》2015,27(4):1207-1210
[Purpose] The purpose of this study was to investigate the difference in onset timing
between the vastus medialis and lateralis among the different knee alignments, as well as
the best isokinetic angular velocity for an isokinetic concentric contraction. [Subjects]
Fifty-two adults (20 with genu varum, 12 genu valgum, and 20 controls) were enrolled in
this study. Subjects with > 4 cm between the medial epicondyles of the knee were placed
in the genu varum group, whereas subjects with > 4 cm between the medial malleolus of
the ankle were placed in the genu valgum group. [Methods] Surface electromyography was
used to measure the onset times of the vastus medialis and vastus lateralis during
concentric contractions at 30, 60, and 90°/sec. [Results] The vastus lateralis showed more
delayed firing than the vastus medialis in the genu varum group, whereas vastus medialis
firing was delayed more than that of the vastus lateralis in the genu valgum group. No
differences in onset timing were observed between the vastus medialis and lateralis
according the different angular velocities during concentric contractions in all three
groups. [Conclusion] Genu varum and valgum affect quadriceps firing. Therefore, selective
rehabilitation training of the quadriceps femoris should be considered to prevent pain or
knee malalignment deformities.Key words: Quadriceps muscle, Genu varum, Genu valgum 相似文献
3.
[Purpose] The purpose of the present study was to examine the effects of squat exercises
performed on different surfaces on the activity of the quadriceps femoris muscle in order
to provide information on support surfaces for effective squat exercises. [Subjects and
Method] Fourteen healthy subjects performed squat exercises for five seconds each on three
different support surfaces: hard plates, foam, and rubber air discs. Their performance was
measured using electromyography. As the subjects performed the squat exercises on each
surface, data on the activity of the vastus medialis oblique and the vastus lateralis, and
the vastus medials oblique/vastus lateralis ratio, were collected. [Results] The activity
of the vastus medialis oblique and the vastus medialis oblique/vastus lateralis ratio were
found to be statistically significantly higher on rubber air discs than when the squats
were performed on hard plates or foam. [Conclusion] To activate the vastus medialis
obilique, and to enhance the vastus medialis oblique/vastus lateralis ratio, unstable
surfaces that are highly unstable should be selected.Key words: Support surfaces, Vastus medialis obilique, Vastus lateralis 相似文献
4.
Seol Park Jun-Sub Chung Yong-Soo Kong Yu-Min Ko Ji-Won Park 《Journal of Physical Therapy Science》2015,27(9):2727-2730
[Purpose] We investigated the difference in onset time between the vastus medialis and
lateralis according to knee alignment during stair ascent and descent to examine the
effects of knee alignment on the quadriceps during stair stepping. [Subjects] Fifty-two
adults (20 with genu varum, 12 with genu valgum, and 20 controls) were enrolled. Subjects
with > 4 cm between the medial epicondyles of the knees were placed in the genu varum
group, whereas subjects with > 4 cm between the medial malleolus of the ankle were
placed in the genu valgum group. [Methods] Surface electromyography was used to measure
the onset times of the vastus medialis and vastus lateralis during stair ascent and
descent. [Results] The vastus lateralis showed more delayed firing than the vastus
medialis in the genu varum group, whereas vastus medialis firing was more delayed than
vastus lateralis firing in the genu valgum group. Significant differences in onset time
were detected between stair ascent and descent in the genu varum and valgum groups.
[Conclusion] Genu varum and valgum affect quadriceps firing during stair stepping.
Therefore, selective rehabilitation training of the quadriceps femoris should be
considered to prevent pain or knee malalignment deformities.Key words: Quadriceps muscle, Genu varum, Genu valgum 相似文献
5.
[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
6.
Seol Park Yu-Min Ko Gwon-Uk Jang Yoon-Tae Hwang Ji-Won Park 《Journal of Physical Therapy Science》2014,26(11):1685-1688
[Purpose] This study attempted to identify how genu varum or valgum affects the
electromyographic activities of the vastus medialis, vastus lateralis, and rectus femoris
during knee isometric contraction. [Subjects] Fifty-two healthy young adults were enrolled
in this study. They were enrolled and classified into three groups by knee alignment
conditions: the genu varum, genu valgum, and control groups. [Methods] The
electromyographic activity ratio of the vastus medialis to the vastus lateralis and rectus
femoris were calculated using the percentage of maximum voluntary contraction. The
participants contracted their quadriceps during isometric contraction at 30 and 60° of
knee flexion. [Results] The genu varum group had more activity in the vastus medialis than
in the vastus lateralis and rectus femoris, whereas the genu valgum group had more
activity in the vastus lateralis and rectus femoris than in the vastus medialis. There was
a significant difference in the muscle activity ratio between the vastus medialis and
vastus lateralis by angle of knee flexion degree only in the genu valgum. There were no
significant differences in any of the three groups in terms of the muscle activity ratio
of the vastus medialis to the rectus femoris by angle of knee flexion. [Conclusion] The
quadriceps femoris was used for different strategies according to knee alignment during
isometric contraction at 30 and 60°. This study suggests that rehabilitation training
programs used to strengthen the quadriceps should consider the knee alignment conditions
of the target subjects.Key words: Electromyography, Quadriceps muscle, Isometric contraction 相似文献
7.
Keiichi Tsuji Hiroyasu Ishida Kaori Oba Tsutomu Ueki Yuichiro Fujihashi 《Journal of Physical Therapy Science》2015,27(2):353-356
[Purpose] The present study aimed to determine changes in muscle activity while moving on
a treadmill at various speeds. [Subjects] The activities of the left vastus lateralis,
vastus medialis, hip adductors, lateral head of gastrocnemius, medial head gastrocnemius,
soleus, and tibialis anterior of 10 healthy male university students were analyzed.
[Methods] University students walked, jogged, and ran for 10 minutes each in random order,
and then myogenic potentials were measured 10 minutes later for 30 seconds. The flexion
angle of the lower limb upon initial contact, mid stance, and toe off were measured.
[Results] The average walking, jogging, and running speeds were 3.6 ± 0.4, 6.7 ± 0.6, and
10.4 ± 1.3 km/h, respectively. The average electromyographic activities of the vastus
medial, tibialis anterior, medial head of gastrocnemius, and lateral head of gastrocnemius
significantly differed. All muscles were more active during jogging and running than
walking. Only the soleus was more active during running than walking, and the activities
of the hip adductors and vastus lateralis did not significantly differ. [Conclusion]
Velocity is faster and the angles of the lower limbs and ground reaction force (GRF) are
larger during running than walking. The vastus medialis and soleus worked more easily
according to the angle of the knee joint, whereas the tibialis anterior worked more easily
at faster velocities and the medial and lateral heads of the gastrocnemius worked more
easily with an increased GRF.Key words: Walking, Running, Skeletal muscle 相似文献
8.
Jordan Bethel Alban Killingback Claire Robertson Philip J Adds 《Journal of Physical Therapy Science》2022,34(2):161
[Purpose] To investigate the effects of a seven-week quadriceps stretching program on the muscle fibre orientation of the vastus medialis oblique and vastus lateralis in the lower limbs by ultrasound imaging. [Participants and Methods] Twenty-seven healthy, physically fit, asymptomatic females and males (age 21.5 ± 1.3, Tegner activity level score ≥4) were recruited. Their initial vastus medialis oblique and vastus lateralis fibre angles were determined using ultrasound. They then undertook a seven-week quadriceps stretching program, 3 sets of stretches to be performed on both lower limbs, 3 times a week on 3 separate days. One volunteer was assigned as an intra-rater control and did not take part in the stretching program. The vastus lateralis and vastus medialis oblique fibre angles were measured again on completion of the exercise regime. [Results] A statistically significant decrease in muscle fibre angle was observed in both the right and left vastus medialis oblique, and the right and left vastus lateralis. [Conclusion] A 7-week stretching program can result in a significant decrease in muscle fibre angle in both the vastus medialis oblique and the vastus lateralis. This can help in understanding the effects of prescribed stretching exercises on athletic patients with PFP. 相似文献
9.
Dong-Kyu Lee Il-Young Yu In-Gui Jung Jae-Seop Oh 《Journal of Physical Therapy Science》2015,27(6):1869-1870
[Purpose] This study compared the electromyographic activity of the quadriceps in
hemiplegic patients during the downward, maintenance, and upward phases of squat exercises
performed with the feet parallel and with the non-paretic foot lifted. [Subjects] A total
of 17 hemiplegic patients (9 males and 8 females) volunteered for this study. [Methods]
All subjects performed squat exercises with the knees flexed to 30° and with the feet
parallel (shoulder-width apart) or with lifting of the non-paretic foot (normalized to 25%
of the knee height). [Results] The activity of the rectus femoris, vastus medialis
oblique, and vastus lateralis muscles was significantly higher during squat exercises
performed with the non-paretic foot lifted than with the feet parallel to each other. The
activity of all muscles during the maintenance phase of the exercises was greater than
that during the downward and upward phases. [Conclusion] Lifting the non-paretic foot
during squats may represent an effective exercise for motor function rehabilitation in
hemiplegic patients.Key words: EMG, Foot lifting, Squat exercise 相似文献
10.
Pil-Neo Hwangbo 《Journal of Physical Therapy Science》2015,27(5):1507-1510
[Purpose] The purpose of this study was to identify the effects of performing squat
exercises with visual feedback on the activation of the vastus medialis oblique (VMO) and
vastus lateralis (VL) muscles in young adults with an increased quadriceps angle
(Q-angle). [Subjects] This study used a motion analysis program (Dartfish, Switzerland) to
select 20 young adults with an increased Q-angle, who were then divided into a squat group
that received visual feedback (VSG, n=10) and a squat group that received no visual
feedback (SG, n=10). [Methods] The intensity of exercises was increased every two weeks
over a six-week exercise period in both groups. A visual marker was attached to the
patella of the subjects in the VSG, and they then performed squat exercises with a maximum
of 90° of knee flexion within a route marked on a mirror. The SG performed squat exercises
with a maximum 90° of knee flexion without attaching a visual feedback device. [Results]
Analysis of the muscle activation due to 90° squat exercises indicated that both groups
had statistically significant increases in activation of the VL. The VSG exhibited
statistically significant increases in activation of the VMO. [Conclusion] This study
confirmed that squat exercises with visual feedback are effective in activation of the VMO
and VL muscles. The findings are meaningful in terms of preventing the occurrence of
patellofemoral pain.Key words: Q-angle, Visual feedback squat exercise, VMO 相似文献
11.
[Purpose] This study aims to investigate how squat exercises on a decline board and how
the knee joint angles affect the muscle activity of the lower limbs. [Subjects] The
subjects were 26 normal adults. [Methods] A Tumble Forms wedge device was used as the
decline board, and the knee joint angles were measured with a goniometer. To examine the
muscle activity of the biceps femoris, rectus femoris, gastrocnemius lateralis, and
tibialis anterior of the lower limbs, a comparison analysis with electromyography was
conducted. [Results] The muscle activity of the biceps femoris, rectus femoris,
gastrocnemius lateralis, and tibialis anterior increased with increased knee joint angles,
both for squat exercises on the decline board and on a flat floor. When the knee joint
angle was 45°, 60°, and 90°, the muscle activity of the rectus femoris was significantly
higher and that of the tibialis anterior was significantly lower during squat exercises on
the decline board than on the flat floor. When the knee joint angle was 90°, the muscle
activity of the gastrocnemius lateralis was significantly lower. [Conclusion] Squat
exercises on a decline board are an effective intervention to increase the muscle activity
of the rectus femoris with increased knee joint angles.Key words: Decline board, Squat exercise, Range of motion 相似文献
12.
Minoru Murayama 《Journal of Physical Therapy Science》2021,33(4):322
[Purpose] We aimed to evaluate knee joint movement and muscle activity ratio changes in stroke hemiplegic patients in recovery phase after using a knee-ankle-foot orthosis with an adjustable knee joint for 1 month; we also aimed to discuss the practical implications of our findings. [Participants and Methods] The participants were 8 hemiplegic patients in the recovery phase of stroke who were prescribed knee-ankle-foot orthosis with adjustable knee joint. We measured knee joint angles and electromyographic activity of the vastus medialis and biceps femoris during walking in two conditions: the knee-ankle-foot orthosis knee joint fixed in the extended position and the knee joint moved from 0° to 30° in the flexion direction. Measurements were taken 2 weeks after completion to account for habituation of the orthosis and repeated 1 month later. [Results] When the knee joint was moving from 0° to 30° in the flexion direction, the knee joint angle at initial contact and the minimum flexion angle of the gait cycle decreased significantly between the first and second measurements. When knee joint flexion was 30°, the muscle activity ratio of the vastus medialis increased significantly in the loading response and mid-stance compared to when it was fixed. [Conclusion] Setting the knee joint of a knee-ankle-foot orthosis in accordance with the knee joint movement may increase the muscle activity ratio of the vastus medialis from loading response to mid-stance.Key words: Stroke, Electromyography, Knee-ankle-foot orthosis 相似文献
13.
Activation of the quadriceps muscle during semisquatting with different hip and knee positions in patients with anterior knee pain. 总被引:3,自引:0,他引:3
P L Lam G Y Ng 《American journal of physical medicine & rehabilitation / Association of Academic Physiatrists》2001,80(11):804-808
OBJECTIVE: We measured the surface electromyographic activities of vastus medialis obliquus and vastus lateralis in 16 subjects with patellofemoral joint pain syndrome. DESIGN: Each subject performed bilateral static knee extension exercises at 60% of his or her maximal voluntary effort under different combinations of hip rotation (30 degrees of medial rotation, neutral, 45 degrees of lateral rotation) and knee flexion (20 and 40 degrees) in a standing position. The ratio of surface-integrated electromyographic signals of vastus medialis obliquus over vastus lateralis was calculated for each of the six conditions. Because of significant interaction of hip rotation and knee flexion in the two-way analysis of variance, data were analyzed separately with paired t tests for the effect of knee positions and one-way repeated measures analysis of variance for hip positions. RESULTS: At 20 degrees of knee flexion, there was no significant difference among the three hip positions, whereas at 40 degrees of knee flexion, medial rotation of the hip resulted in significantly higher vastus medialis obliquus over vastus lateralis activity ratio than lateral rotation (P < 0.05). CONCLUSIONS: There was relatively more activation of vastus medialis obliquus than vastus lateralis at 40 degrees of semisquat with the hip medially rotated by 30 degrees. This finding has clinical implications for training the vastus medialis obliquus in patients with patellofemoral joint pain syndrome. 相似文献
14.
Boram Choi 《Journal of Physical Therapy Science》2015,27(3):893-895
[Purpose] The purpose of this study was to examine the vastus medialis oblique to vastus
lateralis ratio in two pelvic tilt positions while performing the sit-to-stand task.
[Subjects and Methods] Activation of the vastus medialis oblique and the vastus lateralis
muscles of 46 healthy subjects (25 males, 21 females) were recorded by surface
electromyography during the STS task with anterior pelvic tilt (sit with thoracolumbar
spine extended and pelvis in an anterior tilt) and neutral pelvic tilt (sit with
thoracolumbar spine relaxed and pelvis in the neutral tilt position) positions. Changes in
vastus medialis oblique, vastus lateralis activation and the vastus medialis
oblique/vastus lateralis ratio were analyzed. [Results] Vastus medialis oblique and vastus
lateralis muscle activation significantly increased in neutral pelvic tilt position, but
the vastus medialis oblique/vastus lateralis ratio was not statistically different.
[Conclusion] The sit-to-stand procedure with neutral pelvic tilt position increased
activation of the vastus medialis oblique and vastus lateralis, usefully strengthening the
quadriceps, but did not selectively activate the vastus medialis oblique muscle.Key words: Anterior pelvic tilt, Neutral pelvic tilt, Sit-to-stand task 相似文献
15.
[Purpose] This study examined the effects of neuromuscular training on knee joint
stability after anterior cruciate ligament reconstruction. [Subjects and Methods] The
subjects were 16 adults who underwent arthroscopic anterior cruciate reconstruction and
neuromuscular training. The Lysholm scale was used to assess functional disorders on the
affected knee joint. A KT-2000 arthrometer was used to measure anterior displacement of
the tibia against the femur. Surface electromyography was used to detect the muscle
activation of the vastus medialis oblique, vastus lateralis, biceps femoris, and
semitendinosus before and after neuromuscular training. [Results] There was significant
relaxation in tibial anterior displacement of the affected and sound sides in the supine
position before neuromuscular training. Furthermore, the difference in the tibial anterior
displacement of the affected knee joints in the standing position was reduced after
neuromuscular training. Moreover, the variation of the muscle activation evoked higher
muscle activation of the vastus medialis oblique, vastus lateralis, biceps femoris, and
semitendinosus. [Conclusion] Neuromuscular training may improve functional joint stability
in patients with orthopedic musculoskeletal injuries in the postoperative period.Key words: Arthrometer, Anterior cruciate ligament reconstruction, Neuromuscular training 相似文献
16.
Exercise effect on electromyographic activity of the vastus medialis oblique and vastus lateralis muscles 总被引:4,自引:0,他引:4
The purpose of this study was to determine whether the vastus medialis oblique muscle (VMO) had greater electrical activity than the vastus lateralis muscle (VL) when hip adduction and medial (internal) tibial rotation exercises were performed. Electrical activity of the VMO and VL was measured on 25 healthy subjects during maximal-effort isometric contractions of hip adduction and medial tibial rotation. The results showed that the electromyographic activity of the VMO was significantly greater than that of the VL during the hip adduction exercise. Differences noted with medial tibial rotation were not significant. The results suggest that the VMO may be selectively activated by performing hip adduction exercises. Resistive hip adduction exercises, therefore, may be advisable in the treatment of patients with lateral malalignment of the patella with accompanying pain or instability. 相似文献
17.
[Purpose] The purpose of this study was to conduct a scientific analysis of the
effectiveness of Kinesio taping at preventing injury and improving horse racing jockey''
performance, by studying the effects on isokinetic muscular function of Kinesio taping
applied to the knee joint muscle. [Subjects] Eight horse racing jockeys were selected for
this study. [Methods] Measurement of isokinetic muscular function of both flexor and
extensor muscles was performed at the angular velocities of 60°/sec and 180°/sec using a
Biodex system 3, before and after application of Kinesio taping to the rectus femoris,
vastus medialis, vastus lateralis, and hamstring. [Result] At the angular velocities of
60°/sec and 180°/sec, significant differences were observed in both flexor and extensor
peak torque, average power, and total work of the knee joint after application of Kinesio
taping. [Conclusion] The application of Kinesio taping has a positive effect on the
function of both knee flexors and extensors, and also kinetic ability. Therefore, its use
would lead to a significant increase in the muscle function of horse racing jockeys.Key words: Horse racing jockeys, Isokinetic, Kinesio taping 相似文献
18.
Wen-Dien Chang Wei-Syuan Huang Chia-Lun Lee Hung-Yu Lin Ping-Tung Lai 《Journal of Physical Therapy Science》2014,26(9):1363-1366
[Purpose] The muscle strength of the quadriceps muscle is critical in patellofemoral pain
syndrome. The quadriceps muscle supplies the power for dynamic patellar movement, and the
vastus medialis oblique (VMO) and vastus lateralis (VL) enable the patella to stabilize
during tracking. We followed the theories about open and closed kinetic chain exercises to
design two exercises, sling open chain knee extension (SOCKE) exercise and sling closed
chain knee extension (SCCKE) exercise. The purpose of our study was to research the
changes in quadriceps muscle activity during both exercises. [Methods] Electromyographic
analysis was used to explore the different effects of the two exercises. The MVC% was
calculated for the VMO and VL during exercise for analysis. [Results] We found that the
mean MVC% values of the VMO and VL during the SOCKE exercise were higher than those during
the SCCKE exercise. The ratio of the VMO to VL was 1.0 ± 0.19 during the SOCKE exercise
and 1.11 ± 0.15 during the SCCKE exercise. [Conclusions] The SOCKE exercise is targeted at
quadriceps muscle training and has a recruitment effect on the VMO. The beneficial effect
of the SOCKE exercise is better than that of the SCCKE exercise.Key words: Patellofemoral pain syndrome, Sling exercise therapy, Electromyography 相似文献
19.
[Purpose] The purpose of this study was to examine the effect of neuromuscular
electrical stimulation (NMES) on heart rate variability (HRV). [Subjects and Methods] Ten
healthy subjects participated in the study. All subjects received NMES with a pulse
duration of 300 us and frequency of 30 Hz at the vastus lateralis and vastus medialis for
15 minutes. The stimulation intensity was adjusted in the range of 20 to 30 mA. HRV using
a pulse oximeter was measured in the sitting position before and after NMES. [Results]
After the NMES, all HRV data slightly increased, but there was no significance between
before and after data. [Conclusion] We suggest that strengthening exercises using NMES may
be undertaken safely.Key words: Neuromuscular electrical stimulation, Heart rate variability, Strengthening exercise 相似文献
20.
Yun Lak Choi Bo Kyung Kim Yong Pil Hwang Ok Kon Moon Wan Suk Choi 《Journal of Physical Therapy Science》2015,27(1):149-153
[Purpose] The purpose of our study was to investigate the effects of isometric exercises
using electromyographic biofeedback (EMGBF) and ultrasound biofeedback (USBF) on maximum
voluntary isometric contraction (MVIC), pain assessed by the Visual Analogue Scale (VAS),
and vastus medialis oblique (VMO) thickness in patients with knee osteoarthritis (OA).
[Subjects and Methods] Thirty females over 65 years of age who had been diagnosed with
knee osteoarthritis were recruited and randomly assigned to three groups, each comprising
of 10 subjects. The Subjects in the EMGBF training and USBF training groups were trained
with the corresponding physical training exercise program targeting the vastus medialis
oblique, whereas the subjects in the control group were treated with conventional physical
therapies, such as a hot pack, ultrasound, and transcutaneous electrical nerve
stimulation. Subjects in each group were trained or treated for 20 min, 3 times a week for
8 weeks. [Results] The MVIC in the EMGBF and USBF training groups was significantly
increased compared with that in the control group, and the VAS score (for measurement of
pain) in the EMGBF and USBF training groups was significantly decreased compared with that
in the control group. Only the EMGBF training group showed a significantly increased VMO
thickness compared with before training. [Conclusion] These results suggest that USBF
training is similar to EMGBF training in terms of its effectiveness and is helpful for
treating patients with knee OA.Key words: Conventional physical therapy, Electromyographic biofeedback, Ultrasound biofeedback 相似文献