Earticle

The purpose of this study was to determine the effect of two-hand backhand shots on wrist extensor and flexor muscle activation. Fourteen collegiate tennis athletes were participated in this study. The subjects does not have experiences of surgery on lateral epicondyle of elbow and musculoskeletal for at least last 6 months. The mean and standard deviation of data was calculated by SPSS/PC 18.0 and One-way ANOVA (post-hoc: LSD) was used to verify differences among groups. Significant level was p<.05. The results of this study were as follows; 1. There was significant difference on maximal value of muscle activation of extensor carpi ulnaris (D>S>V) and on maximal value of muscle activation of flexor carpi radialis(D>S>V) in male athletes by types of two-hand backhand shot(p<.05). 2. There was significant difference on maximal and average value of muscle activation of flexor carpi radialis(D>V>S) in female athletes by types of two-hand backhand shot(p<.05). In conclusion, this study suggests that beginers should learn a drive after aquiring the other skills to prevent their injuries since the level of muscle activation is higher than the others.

본 연구는 착지 후 방향 전환 과제에서 외부 부하 조건(맨몸, 중량조끼, 아쿠아베스트)이 하지 근활성 도와 압력중심(center of pressure, COP) 동요에 미치는 영향을 비교하는 것을 목적으로 하였다. B광역시 소재 B대학교 남학생 30명을 대상으로 30cm 박스에서 비우세 다리 착지 후 우세 다리 90° 방향전환 동작을 수행하도록 하였으며, 맨몸·중량조끼(8kg)·아쿠아베스트(8kg) 조건을 모두 적용하였다. 하지 근 활성도는 넙다리곧은근, 가쪽넓은근, 반힘줄모양근, 넙다리두갈래근의 %MVIC로 산출하였고, COP 지표는 총 이동거리와 평균 이동속도로 평가하였다. 그 결과, 착지 구간에서는 넙다리곧은근과 넙다리두갈래근 에서 아쿠아베스트 조건이 다른 조건보다 유의하게 높은 근활성도를 보였으며, 안정화 구간에서는 넙다 리곧은근, 반힘줄모양근, 넙다리두갈래근에서 아쿠아베스트 조건이 가장 높은 근활성도를 보였다. COP 분석에서도 착지 및 안정화 구간 모두에서 아쿠아베스트 조건의 총 이동거리와 평균 이동속도가 가장 크게 나타나, 물의 관성 부하가 가장 높은 자세 동요와 균형 요구를 부과하는 것으로 나타났다. 결론적 으로, 아쿠아베스트는 고정 중량과 달리 지속적이고 다방향의 외부동요를 제공하여 착지 및 방향전환 상 황에서 신경근 조절 요구를 크게 증가시키는 부하 형태임이 확인되었다. 본 연구 결과는 아쿠아베스트가 ACL 손상 위험이 높은 동작에서 근신경 조절능력 향상과 동적 안정성 트레이닝에 활용될 수 있는 잠재 적 도구임을 시사한다.

Objectives This study aimed to compare the effects of different external load conditions—bodyweight, weighted vest, and aqua vest—on lower-limb muscle activation and center of pressure (COP) sway during a landing and direction-change task. Methods Thirty healthy male university students (20–29 years) performed single-leg landings from a 30-cm box followed by a 90° direction change. All participants completed three load conditions: bodyweight, 8-kg weighted vest, and 8-kg aqua vest. sEMG was recorded from four lower-limb muscles and normalized to %MVIC, while COP total distance and mean velocity were collected using a force plate. A repeated-measures ANOVA with Bonferroni corrections was used to compare conditions. Results During the landing phase, the aqua vest condition elicited significantly higher rectus femoris and biceps femoris activation than the bodyweight and weighted vest conditions (p<.05). During stabilization, the aqua vest also showed the highest activation in the rectus femoris, semitendinosus, and biceps femoris (p<.05). COP total distance and mean velocity were significantly greater under the aqua vest in both phases, indicating increased postural sway and neuromuscular demand. Conclusions The aqua vest generated greater multidirectional perturbations than the weighted vest, leading to higher neuromuscular activation and COP displacement during landing and direction change. Inertial water load appears to provide a challenging dynamic stimulus and may be useful for improving neuromuscular control and dynamic stability in ACL-relevant movements.

PURPOSE : The purpose of this study was to investigate the side plank exercis e effect on the muscle activity of core muscles. After performing exercise by ap plying each sling position differently to the side plank exercise, the muscle activi ty of External obilique abdominal muscle(EO), Internal oblique abdominal muscle (IO) and Rectus abdominal muscle(RA) was compared. It was intended to lay th e foundation for presenting more efficient exercise methods to subjects in need of strengthening abdominal muscles. METHOD : The subjects of this study were 30 healthy adults (15 men and 15 women) and were randomly and equally assigned to three groups by a random n umber table. All subjects were divided into three groups according to the side pl ank exercise method. side flank (Group A = general side plank, Group B = knee sling side plank , Group C = ankle sling side plank). The side plank exercise was performed three times a week for 4 weeks for 1 minute and 50 seconds. We had pre-post measurements of trunk muscles(EO,IO,RA). All measured data were compared and analyzed as follows. Measure the corresponding table number T test and repeat measurement ANOVA and one-way ANOVA. The statistical significance level is set to 0.05. RESULT : The results of this study are as follows: 1. There were significant differences in the External obilique abdominal muscle(EO) and Rectus abdominal muscle(RA) in all groups 2. Compared to other conditions, there was significant muscle activity when wearing slings at the ankles (p<0.05). CONCLUSION : The trunk muscle activity was the most effective when exercising the ankle sling side plank. As a result, when the lever was exercised on the longest and unstable support, the greatest effect was seen. It can be seen that the long and stable support surface has a better effect than the short and unstable support surface.

본 연구는 전신진동 자극시 스쿼트의 형태에 따른 하지근육의 근활성 효과의 차이를 분석함으로써 전신진동운동의 효과를 규명하고 효율적인 운동을 위한 과학적 근거를 제시하는데 그 목적이 있다. 본 연구는 정형외과적 질환이 없는 건강 한 20대 남성 10명을 대상으로 똑바로 선자세, 슬관절을 90도, 120도 굴곡시킨 일반적인 스쿼트 자세와 뒷꿈치를 들어 올린 혼합 스쿼트 자세의 진동자극 시 근활성도를 측정하였다. 근활성도는 외측비복근, 전경골근, 외측광근, 대퇴이두근에 근전도 전극을 부착한 후 RMS를 구하여 비교하였으며 진동 자극의 강도는 각 자세에서 볼륨 50, 80, 주파수 10, 25, 40Hz를 혼합하여 적용하였다. 분석 결과 외측비복근과 전경골근 외측광근에서 자세별 근활성도의 차이가 나타났고 뒷꿈치를 들어올린 자세에 서 근활성 효과가 높음을 확인할 수 있었다. 이와 같은 결과는 전신진동 자극 시 스쿼트 자세와 강도에 따라 근활성 효과에 차이가 있으며, 운동의 효율을 극대화하기 위하여 목표 근육에 따라 다양한 자세와 강도가 적용되어야 함을 의미한다.

The purpose of this study is to clarify the effects of whole-body vibration and to provide scientific basis for effective exercise by analyzing the differences in lower extremity muscle activation according to squat position during whole body vibration. In this study, muscle activation during whole-body vibration was measured in 10 healthy males in their 20s with no orthopedic conditions during standing posture, deep squat, half squat, and heel raise squat. Muscle activation was compared by measuring the root mean square (RMS) with electromyography electrodes attached to lateral gastrocnemius, tibialis anterior, vastus lateralis, and biceps femoris. The vibration intensity was applied in combinations of the volumes of 50 and 80 and the frequencies of 10, 25, and 40 Hz in each posture. The results showed that there were differences in muscle activations of external gastrocnemius, tibialis anterior, and vastus lateralis among the position(p<.05). The heal raise squat was found to have a high muscle activation effect.

PURPOSE : The purpose of this study was to compare effects of isometric hip adduction using tools on muscle activity rates of VMO and VL while performing squat. METHOD : Seventeen healthy male subjects, between twenty and fourty years old, performed traditional squat exercise and squat with isometric hip adduction using ball, Theraband, Pilates circle on stable and unstable base of support(BOS) for 3 sets of 5 seconds. They had a rest for 30 seconds between each set and rest for 30 minuts between each tool. The muscle activities of VMO and VL while performing the exercise were measured by electromyography(EMG) and muscle activity rates of VMO and VL was calculated. The obtained data were analyzed using SPSS 23.0 version. RESULT : Squat with isometric hip adduction using ball produced significantly high muscle activity rate of VMO(p<0.001). Muscle activity rate of VMO during performing squat with isometric hip adduction using tools and traditional squat was significantly greater on stable BOS than on unstable BOS. CONCLUSION : The exercise on unstable surface is more effective than on unstable surface. The ball squat exercise is the most effective than another 3 exercise group(TS, TS, PS). The best method for the selective strengthening of VMO muscle is ball squat exercise on unstable surface.

Objective: To assess the correlation between surface electromyography (SEMG) and conventional EMG in patients with facial nerve palsy. Additionally, compare the discomfort and the time required by the patients in two methods. Method: 36 patients with facial palsy were given nerve conduction studies (NCS) via conventional EMG. Then, the peak root mean square (RMS) values were obtained from the SEMG. We also recorded visual analogue scale (VAS), House- Brackmann scale, and the time required for the examination. Results: Pearson’s correlation coefficient between the amplitude loss ratio of the RMS values obtained by SEMG compared to the unaffected side (RSEMG) and the amplitude loss ratio of CMAP amplitudes compared to the unaffected side (RCMAP) was 0.567 at the frontalis, 0.456 at the orbicularis oculi, 0.393 at the nasalis, and 0.437 at the orbicularis oris. An increase in RSEMG is positively correlated with an increase in RCMAP. The mean VAS score with conventional EMG was 3.55 ± 1.42, whereas that experienced when using SEMG was 0.11 ± 0.52 and the mean time required for conventional EMG was 610 ± 103.84 seconds, while that required for SEMG was 420 ± 86.32 seconds. Conclusion: This study demonstrated a significant positive correlation between facial muscle activities as measured by SEMG and conventional EMG in patients with facial nerve palsy. SEMG has the benefits of being more comfortable and faster when diagnosing facial palsy.

Objective: To assess whether surface electromyography (SEMG) can provide additional information to conventional nerve conduction studies (NCS) in patients with mild Carpal tunnel syndrome (CTS). Method: Patients with CTS were classified into mild and moderate-to-severe groups based on conventional NCS. Healthy subjects served as the control group, and NCS were performed on them. The root mean square (RMS), median power frequency (MDF), mean power frequency (MNF), and neuromuscular efficiency (NME) values were obtained using SEMG. We observed significant changes in the SEMG signals in CTS patients compared to healthy subjects. We also examined the correlation between SEMG signal changes and conventional NCS according to the severity of CTS in the patients. Results: The moderate-to-severe group showed significantly lower RMS values than the control group, but there was no difference between the other groups. RMS values were associated with mid-palm-to-wrist sensory nerve conduction velocity in the mild group. However, there was a significant correlation between RMS and all NCS parameters in the moderate-to-severe group. Simple linear regression showed that the finger-to-wrist sensory nerve conduction velocity among the NCS parameters affecting RMS had the strongest effect. Conclusion: SEMG does not supplement conventional NCS in patients with mild CTS. SEMG can support conventional NCS to some extent for moderate-to-severe CTS patients.

Objective To identify the center of extensor indicis (EI) muscle through cadaver dissection and compare the accuracy of different techniques for needle electromyography (EMG) electrode insertion.Methods Eighteen upper limbs of 10 adult cadavers were dissected. The center of trigonal EI muscle was defined as the point where the three medians of the triangle intersect. Three different needle electrode insertion techniques were introduced: M1, 2.5 cm above the lower border of ulnar styloid process (USP), lateral aspect of the ulna; M2, 2 finger breadths (FB) proximal to USP, lateral aspect of the ulna; and M3, distal fourth of the forearm, lateral aspect of the ulna. The distance from USP to the center (X) parallel to the line between radial head to USP, and from medial border of ulna to the center (Y) were measured. The distances between 3 different points (M1?M3) and the center were measured (marked as D1, D2, and D3, respectively). Results The median value of X was 48.3 mm and that of Y was 7.2 mm. The median values of D1, D2 and D3 were 23.3 mm, 13.3 mm and 9.0 mm, respectively.Conclusion The center of EI muscle is located approximately 4.8 cm proximal to USP level and 7.2 mm lateral to the medial border of the ulna. Among the three methods, the technique placing the needle electrode at distal fourth of the forearm and lateral to the radial side of the ulna bone (M3) is the most accurate and closest to the center of the EI muscle.

Background The Pilates method has recently been recommended as the best way to improve spinal stability by strengthening the trunk and gluteus maximus (GM) muscles. Purpose In this study, we compared trunk and GM muscle activities and pelvic rotation angles during four traditional Pilates exercises. Study design Cross-sectional study Methods Twenty healthy volunteers were recruited for this study. During the four exercises, the activity of the trunk and GM muscles were measured via electromyography and pelvic rotation was measured using a smart phone-based measurement tool. Results The activities of the transverse abdominis/internal oblique and external oblique muscles were highest during the leg pull front (LPF) compared to the other exercises. GM activity was significantly higher during the LPF compared to the shoulder bridge and swimming (SW), but not during the one leg kick (OLK). Multifidus (MF) activity was significantly higher during SW than during the other exercises. There were no significant differences in MF activity between the SW and OLK exercises. Pelvic rotation angle was significantly reduced during the OLK compared to the LPF (p=0.004). Conclusions We recommend the LPF exercise if the goal is increased trunk and GM muscle activity and the SW exercise if you target for increased MF activity. The OLK exercise is useful for activating the trunk and GM muscles while reducing uncontrolled pelvic movements.

Objective To find the optimal needle insertion site for needle electromyography of the pronator teres (PT) muscle among commonly used sites.Methods Fifty forearms of 25 healthy subjects were evaluated. Four expected needle insertion points were designated as follows. Point 0 was positioned at the midpoint between the medial epicondyle and medial border of biceps tendon in the elbow crease. Points 1, 2, and 3 were located 2 cm, 3.5 cm and 5 cm distal to point 0, respectively. We assumed that the thickness of PT and the distances between a vertical line from each point to the medial margin of the PT were significant parameters for finding the optimal site. Thus, we measured these parameters through ultrasonographic examination.Results In men, the PT was thickest at point 2, and in women, at point 1. The distance between the expected needle insertion line and medial margin of PT was longest at point 1 in both men and women, and was statistically significant compared to points 2 and 3. Both men and women had neurovascular bundles located lateral to the expected needle insertion line. Conclusion The most appropriate and safe needle electromyographic insertional site for the PT is 2?3.5 cm distal to the mid-point between the biceps tendon and medial epicondyle in the elbow crease and the needle should be inserted upward and medial.

Being located in the hypogastric area, the ilioinguinal nerve, together with iliohypogastric nerve, can be damaged during lower abdominal surgeries. Conventionally, the diagnosis of ilioinguinal neuropathy relies on clinical assessments, and standardized diagnostic methods have not been established as of yet. We hereby report the case of young man who presented ilioinguinal neuralgia with symptoms of burning pain in the right groin and scrotum shortly after receiving inguinal herniorrhaphy. To raise the diagnostic certainty, we used a real-time ultrasonography (US) to guide a monopolar electromyography needle to the ilioinguinal nerve, and then performed a motor conduction study. A subsequent US-guided ilioinguinal nerve block resulted in complete resolution of the patient’s neuralgic symptoms.

A 22-year-old woman visited our clinic with a history of radiofrequency volumetric reduction for bilateral masseter muscles at a local medical clinic. Six days after the radiofrequency procedure, she noticed a facial asymmetry during smiling. Physical examination revealed immobility of the mouth drawing upward and laterally on the left. Routine nerve conduction studies and needle electromyography (EMG) in facial muscles did not suggest electrodiagnostic abnormalities. We assumed that the cause of facial asymmetry could be due to an injury of zygomaticus muscles, however, since defining the muscles through surface anatomy was difficult and it was not possible to identify the muscles with conventional electromyographic methods. Sono-guided needle EMG for zygomaticus muscle revealed spontaneous activities at rest and small amplitude motor unit potentials with reduced recruitment patterns on volition. Sono-guided needle EMG may be an optimal approach in focal facial nerve branch injury for the specific localization of the injury lesion.

Objective: To examine back muscle activity and fatigue behavior in female patients with degenerative thoracolumbar kyphosis (DTK) using high-density surface electromyography (HDSEMG) and evaluate the effects of using a soft spinal orthosis.Methods: Seven female participants with DTK (mean age: 73.6 years) were assessed during static standing and a weighted holding task with and without a soft spinal orthosis. HDSEMG signals were obtained from the lumbar erector spinae using a 64-electrode array. Time to fatigue (TTF), spatial displacement, and directional consistency of muscle activation were analyzed using the spatial center of activity (SCoA) and circular variance (CV).Results: Orthosis use significantly reduced the sagittal vertical axis and low back pain. TTF was significantly prolonged during the weighted holding task with the orthosis (p=0.012), indicating delayed fatigue onset. SCoA displacement was significantly reduced in both tasks (p<0.001), whereas CV analysis demonstrated improved directional consistency of muscle activation.Conclusion: HD-SEMG revealed early fatigue onset and unstable muscle activation patterns in patients with DTK, particularly during load-bearing tasks performed without orthotic support. Orthosis used improved endurance and neuromuscular efficiency by reducing spatial and directional variability in muscle recruitment. These findings underscore the utility of HDSEMG for elucidating the neuromuscular pathophysiology of DTK and support the use of spinal orthoses as a conservative treatment approach.

Background Shoulder horizontal abduction exercise is a common exercise for promoting lower trapezius muscle activity. However, studies on the effectiveness of shoulder horizontal abduction exercises performed in various positions are lacking. Purpose This study aimed to verify the effect of shoulder horizontal abduction exercise with thoracic extension performed in the prone and sitting positions on upper and lower trapezius muscle activity. Study design Case series study Methods A total of 12 healthy adults without shoulder pain performed prone shoulder horizontal abduction, prone shoulder horizontal abduction with thoracic extension, and sitting shoulder horizontal abduction with thoracic extension. Upper and lower trapezius muscle activity during each shoulder horizontal abduction exercise was measured using surface electromyography. Results Upper trapezius muscle activity was lowest during sitting shoulder horizontal abduction with thoracic extension compared to prone shoulder horizontal abduction with and without thoracic extension, whereas lower trapezius muscle activity was highest during prone shoulder horizontal abduction with thoracic extension compared to prone shoulder horizontal abduction and sitting shoulder horizontal abduction with thoracic extension. The upper trapezius/lower trapezius muscle activity ratio did not differ between exercises. Conclusions The findings indicate that considering various exercise positions based on the purpose of the shoulder horizontal abduction exercise is necessary.

Objective: Skeletal muscle dysfunction, which is characterized by decreased muscle strength and endurance, contributes to dyspnea during exercise in patients with chronic obstructive pulmonary disease (COPD), regardless of pulmonary function. This study analyzed skeletal muscle function in patients with COPD through surface electromyography (sEMG) evaluations and signal processing and attempted to determine whether sEMG parameters for muscle fatigue reflect the course of the disease. Methods: In 24 patients with COPD, maximal voluntary isometric contraction and ramp contraction were performed during isometric knee extension, and the sEMG activity of the rectus femoris muscle was measured. The patients were divided into three groups according to their modified Medical Research Council (mMRC) grade and Global Initiative for Chronic Obstructive Lung Disease (GOLD) stage. Patients with mMRC grades 0 and 1 were classified into group A, grade 2 into group B, and grades 3 and 4 into group C. Patients with GOLD stage 1 were classified into group I, stage 2 into group II, and stages 3 and 4 into group III. sEMG parameters were compared between groups using one-way analysis of variance. Results: There were significant differences in the minimum median frequency and fatigue index between the mMRC groups. However, the sEMG parameters did not differ significantly among the GOLD groups. Conclusion: Muscle fatigue differs according to the severity of subjective dyspnea in COPD. sEMG evaluations and signal processing can play supplementary roles in evaluating muscle endurance and predicting functional capacity in COPD.

Needle electromyography (EMG) is valid investigation routinely performed by physiatrists and neurologists, and quite safe when performed by an experienced examiner. Needle EMG is generally well tolerated and rarely thought to be associated with any significant side effects, other than mild pain, so practitioners usually overlook any potential complications. However, needle EMG is an invasive procedure and under certain situations has the potential to be associated with bleeding complications such as hematoma or acute compartment syndrome (ACS). We report a case of ACS after EMG in the left lower extremity that led to a lawsuit. To prevent complications such as hematoma and ACS resulting from needle EMG, we should be familiar with the clinical features of ACS and perform immediate evaluation and treatment to improve patient prognosis.

Objective: This study aimed to determine the proper and safe needle insertion point in the flexor carpi radialis (FCR) muscle under ultrasonography guidance. Methods: We identified the center point (CP) of the FCR as the optimal needle insertion point using ultrasonography. The location of the CP was analyzed using ratios and distances from other landmarks. The vertical distance (CP-VD) was measured by drawing an imaginary vertical line from the CP to the elbow crease. We measured the horizontal distance from the point where the imaginary vertical line from the CP meets the elbow crease to the biceps tendon at the elbow crease level (CP-HD). We presented the ratio of CP-HD to forearm circumference (HD ratio) and the ratio of CP-VD to forearm length (VD ratio) as percentages. Results: The mean values of CP-HD and CP-VD were 2.0 ± 1.0 cm and 8.2 ± 1.1 cm, respectively. The mean HD and VD ratios were 8.4% ± 4.2% and 32.0% ± 3.1%, respectively. Conclusion: When performing electromyography (EMG) of the FCR muscle, it is recommended to perform EMG at the point about 2 cm medial from the biceps tendon at the elbow crease level, to nearly the proximal one-third of forearm length.

근전도(Surface electromyography)는 삼키장애 평가시 신뢰할 수 있고 비침습적이며 시간과 비용을 절약하고 쉽게 사용할 수 있는 진단 도구로서의 잠재력을 가지고 있다. 따라서 이 연구에서는 삼킴장애를 근전도로 평가하는 방법에 대하여 검토 할 것이다. 여러 연구에서 삼킴장애 평가시 3, 5, 10, 15, 20 ml의 물과 반고체 등을 삼키는 것으 로 삼킴 부하를 주거나 및 삼킴단계를 4 단계로 나누어 평가하는 프로토콜을 사용하였다. 일반적으로, 삼킴관련 근 육들의 움직임을 관찰하기 위해 근전도로 깨물근, 목뿔위근육, 목뿔아래근육에서 발생하는 전기신호들을 측정 하 였다. 일차적인 근전도 결과 변수로 삼킴 개시시간, 사전 발작 기간, 삼키는 기간, 진폭, 비정상적인 비자발적 전기활 성도들을 사용하였다. 그중에서도, 비침습적이며 방사선이 없는 근전도를 이용한 삼킴장애의 선별 검사 및 평가는 근전도의 삼키는 기간을 사용하는 것이 가장 간단하고 신뢰할 수 있는 방법이다.

sEMG(Surface electromyography) would have a potential to a diagnostic device with reliable, non-invasive, time-saving, inexpensive, and easy to use for swallowing disorder. Therefore, this study would review the sEMG evaluation method for dysphagia. Swallowing protocols were established with the swallowing of 3, 5, 10, 15, and 20 ml of water to measure the dysphagia in various swallowing loads and in four stages. Commonly, masseter, suprahyoid muscles, and infrahyoid muscles were investigated to observe swallowing movements. The primary sEMG outcome parameters were swallowing onset, pretrigger duration, swallowing duration, swallowing amplitude, and detecting abnormal involuntary action potential. Particularity, investigation in swallowing duration of sEMG is a simple and reliable method for screening and initial evaluation of dysphagia with noninvasive and radiation-free.

The oral cavity serves as the first organ involved in food intake and digestion; therefore, oral health is closely linked to systemic health and quality of life. Particularly, in older adults, tooth loss, occlusal imbalance, and weakened masticatory muscles can impair masticatory function, potentially leading to various health issues, including malnutrition, sarcopenia, and cognitive decline. Maintaining masticatory function is thus essential for healthy aging. To date, most previous studies investigating the association between oral health and systemic health have primarily focused on oral diseases, with very few studies examining oral function. Accordingly, this study aimed to investigate the association between functional occlusal stability during mastication and functional mobility, as measured by the Timed Up and Go (TUG) test, in older adults aged 65 years and older. This study included 187 adults aged 65 years or older (30 men and 157 women) who participated in the “Longitudinal Study on Daily Life of Older Adults through Smart Home Implementation” conducted at OO University between March 10 and October 13, 2025. The mean participant age was 74.79 ± 5.89 years. In this study, functional occlusal stability during mastication was assessed using the Global Index of Neuromuscular Balance (GI) measured with Teethan® (Teethan S.p.A., Italy), a system based on surface electromyography (sEMG). GI was measured three times, and the mean value of the three measurements was used for analysis. Functional mobility was evaluated using the TUG test. The test was performed twice, and the mean value was used for analysis. Multiple linear regression analysis was performed to evaluate the strength of the association between GI and TUG time. In the regression model adjusted for gender, age, osteoporosis, and rheumatoid arthritis, the group with high occlusal stability (GI ≥ 83) demonstrated significantly shorter TUG times compared to the control group (β = -0.166, p = 0.047). These findings suggest that oral function may potentially influence not only oral health but also systemic physical function.