Median Frequency Values Research Articles

Influence of short- segment pedicle fixation of thoracolumbar fractures by Wiltse approach on the multifidus muscle

Objective To analyze the influence of Wiltse approach and conventional transmuscular approach on the multifidus muscle by imageology, histology and electrophysiology assessment following short-segment pedicle fixation on thoracolumbar fractures. Methods 76 patients with thoracolumbar fractures without neurological deficits who had undergone short-segment pedicle fixation between June 2010 and August 2012. Wiltse approach 36 cases, conventional transmuscular approach 40 cases. The perioperative parameters, Visual Analogue Scale scores (VAS), and radiologic parameters, esp the imageology, histology and electrophysiology changes of multifidus muscle were compared. Results 20 cases were fellowed up over 1 year in the Wiltse approach group (20/36, 56%). 25 cases were fellowed up over 1 year in the conventional transmuscular approach group (25/40, 62.5%). No significant differences were found in terms of gender, age, fracture type, injured segment and follow-up period. Till the last follow-up, all patients with vertebral fractures were healed. No loosening or breaking of internal fixation was observed. Compared to the conventional transmuscular approach, the Wiltse approach was significantly advantageous in terms of operation time, the amount of bleeding, hospital stays and VAS scores after the surgery but the length of incision, besides, the Wiltse approach group had less incidence of multifidus atrophy and less fatty infiltration, and in conventional transmuscular approach group electromyography demonstrated that the multifidus muscles median frequency values and average amplitude value were significantly lower than Wiltse approach group. Conclusion The Wiltse approach for thoracolumbar fractures, retaining the posterior ligament complex, is an effective and minimally invasive treatment, with less trauma, less bleeding, less operation time, the advantages of reliable clinical results. Especially less incidence of multifidus atrophy and less fatty infiltration. Key words: Spinal fractures; Electromyography; Histology, comparative

Preventive effects of stretching and stabilization exercises on muscle fatigue in mobile phone users.

[Purpose] The purpose of this study was to investigate the preventive effects of stretching and stabilization exercises on muscle fatigue of the neck erector spine and upper trapezius muscles. [Subjects and Methods] The subjects of this study were 26 healthy university students (14 males and 12 females). Each subject was assigned randomly to each of three study groups in order to prevent order effect. The three groups included in this study were the no-exercise, stretching exercise, and neck stabilization exercise groups. The median electromyographic frequency was used as a gauge of muscle fatigue. [Results] Decreased muscle fatigue was demonstrated by an increase in the median electromyographic frequency values in all the four muscle groups in the comparison between conditions 1 and 3. In particular, statistically significant differences were found between the two conditions in the right upper trapezius muscle group. [Conclusion] These findings suggest that the effect of stretching and stabilization exercises can reduce muscle fatigue in mobile phone users.

Test-retest reliability of electromyographic signal parameters used to evaluate neuromuscular fatigue in quadriceps femoris muscle

The purpose of this study was to analyze the test-retest reliability of the median frequency (MDF) and root mean square (RMS) used to determine the onset of neuromuscular fatigue (NF) during sustained fatiguing contractions of the quadriceps. Eighteen healthy men were tested on two days, and electromyographic (EMG) signals were recorded from the vastus medialis (VM), rectus femoris (RF) and vastus lateralis (VL) during sustained isometric contractions at 20 and 70% of maximum voluntary contractions (MVC) held until exhaustion. The reliability of endurance time was excellent at 20% MVC and poor at 70% MVC. EMG variables were evaluated: (1) at the beginning of the test; (2) at NF; and (3) at the end of the test. The NF time values presented poor reliability. The MDF has shown, in general, poor reliability at 20 and 70% MVC, whereas the RMS reliability presented better results for both loads, especially for RF, followed by the VM and VL muscles. The MDF and RMS values extracted from NF showed poor reliability at 20 and 70% MVC, which suggests caution in using these variables extracted from the EMG signal to determine the onset of NF.

Shoulder girdle muscle activity and fatigue in traditional and improved design carpet weaving workstations.

Work-related musculoskeletal disorders in the neck and shoulder regions are common among carpet weavers. Working for prolonged hours in a static and awkward posture could result in an increased muscle activity and may lead to musculoskeletal disorders. Ergonomic workstation improvements can reduce muscle fatigue and the risk of musculoskeletal disorders. The aim of this study is to assess and to compare upper trapezius and middle deltoid muscle activity in 2 traditional and improved design carpet weaving workstations. These 2 workstations were simulated in a laboratory and 12 women carpet weavers worked for 3 h. Electromyography (EMG) signals were recorded during work in bilateral upper trapezius and bilateral middle deltoid. The root mean square (RMS) and median frequency (MF) values were calculated and used to assess muscle load and fatigue. Repeated measure ANOVA was performed to assess the effect of independent variables on muscular activity and fatigue. The participants were asked to report shoulder region fatigue on the Borg's Category-Ratio scale (Borg CR-10). Root mean square values in workstation A are significantly higher than in workstation B. Furthermore, EMG amplitude was higher in bilateral trapezius than in bilateral deltoid. However, muscle fatigue was not observed in any of the workstations. The results of the study revealed that muscle load in a traditional workstation was high, but fatigue was not observed. Further studies investigating other muscles involved in carpet weaving tasks are recommended.

Internal Oblique and Transversus Abdominis Muscle Fatigue Induced by Slumped Sitting Posture after 1 Hour of Sitting in Office Workers.

BackgroundProlonged sitting leads to low back discomfort and lumbopelvic muscle fatigue. This study examined the characteristics of body perceived discomfort and trunk muscle fatigue during 1 hour of sitting in three postures in office workers.MethodsThirty workers sat for 1 hour in one of three sitting postures (i.e., upright, slumped, and forward leaning postures). Body discomfort was assessed using the Body Perceived Discomfort scale at the beginning and after 1 hour of sitting. Electromyographic (EMG) signals were recorded from superficial lumbar multifidus, iliocostalis lumborum pars thoracis, internal oblique (IO)/transversus abdominis (TrA), and rectus abdominis muscles during 1 hour of sitting. The median frequency (MDF) of the EMG power spectrum was calculated.ResultsRegardless of the sitting posture, the Body Perceived Discomfort scores in the neck, shoulder, upper back, low back, and buttock significantly increased after 1 hour of sitting compared with baseline values (t(9) = −11.97 to −2.69, p < 0.05). The MDF value of the EMG signal of rectus abdominis, iliocostalis lumborum pars thoracis, and multifidus muscles was unchanged over time in all three sitting postures. Only the right and left IO/TrA in the slumped sitting posture was significantly associated with decreased MDF over time (p = 0.019 to 0.041).ConclusionProlonged sitting led to increased body discomfort in the neck, shoulder, upper back, low back, and buttock. No sign of trunk muscle fatigue was detected over 1 hour of sitting in the upright and forward leaning postures. Prolonged slumped sitting may relate to IO/TrA muscle fatigue, which may compromise the stability of the spine, making it susceptible to injury.

Amplitude and frequency changes in surface EMG of biceps femoris during five days Bruce Protocol treadmill test.

Electromyography (EMG) is one of the indirect tools in indexing fatigue. Fatigue can be detected when there are changes on amplitude and frequency. However, various outcomes from literature make researchers conclude that EMG is not a reliable tool to measure fatigue. This paper investigates EMG behavior of biceps femoris in median frequency and mean absolute value during five days of Bruce Protocol treadmill test. Before that, surface EMG signals are filtered using band pass filter cut-off at 20-500Hz and are de-noised using db45 1-decimated wavelet transform. Five participants achieved more than 85% of their maximal heart rate during the running activity. The authors also consider other markers of fatigue such as performance, muscle soreness and lethargy as indicators to adaptation and maladaptation conditions. Result shows that turning points of median frequency and mean absolute value are very significant in indexing fatigue and indicators to adaptation of resistive training.

Activation time analysis and electromyographic fatigue in patients with temporomandibular disorders during clenching

Introduction: The use of surface electromyography (SEMG) is controversial in the diagnosis and subsequent treatment of temporomandibular disorders (TMD), although there is some evidence that the pattern of the masticatory muscles in TMD patients differs from controls. The aim of this study was to compare relative time of mandibular elevator muscle activation at different levels of activity and median frequency (MF) during sustained clenching. Methods: Twenty-two women, aged between 18 and 48years, volunteered to participate in the study. The TMD group had 14 participants diagnosed as group Ia muscle disorders (RDC/TMD). The control group had eight healthy individuals. SEMG records were obtained from masseter and temporal muscles during 10s of sustained clenching. Normalized SEMG amplitudes were classified as minimal, moderate and maximal and time of activation in each level of activity was calculated and compared using two-way ANOVA (groups versus time). A slope of the linear regression line that fits MF values over time was calculated as a fatigue index for elevator muscles. Results: Only the temporal muscles of the TMD group showed longer activation time at moderate and minimal activity levels compared to controls. Fatigue indexes were greater for the TMD group compared to controls. Conclusion: Results showed motor control strategies during sustained clenching that differentiate controls from TMD patients.

Electromyographic assessment on transfemoral amputees to possibly control artificial lower limbs

This study aimed to assess the electromyographic feasibility of different hip muscles on transfemoral unilateral lower limb amputees to a possible control of artificial limbs. The volunteers were split into two groups: eight males, physically active amputees and a control group composed of eight males, healthy, non–amputees individuals. The hip muscles were assessed in accordance to the general consensus by SENIAM project, and some adaptations were made in the amputees when the anatomical references were absents, such as the knee articulation. Thus, agonists and antagonists skeleton muscles were evaluated during the isometric contraction of hips movements of extension and flexion, which were controlled by an isokinect chair. The median frequency (Fmed) values did not represent significant differences and the RMS is the best muscle activity of amputees.

Surface-electromyography signals from patients with lumbar disc herniation before and after core stability exercise therapy

Objective To analyze the surface-electromyography (sEMG) signals of patients with lumbar disc herniation before and after core stability exercise therapy.Methods Thirty-eight cases diagnosed with lumbar disc herniation were randomly divided into a control group (n =19) and an experimental group (n =19) using a random number table.The former was given two weeks' conventional traction physiotherapy,while the latter was given another two weeks of core stability exercise of lumbar and dorsal muscles after the conventional treatment.All of the patients were assessed using a visual analogue scale (VAS) and each was given a Japanese orthopedic association (JOA) score,sEMGs were recorded before and after 4 weeks of treatment.Results After treatment,average VAS scores[(1.11 ±0.74) and (0.95 ±0.62) respectively] and JOA scores[(21.05 ±3.08) and (23.47 ±2.04) respectively] in the control and experimental group both had improved significantly compared to that before treatment (P ＜ 0.01).The average JOA score in the experimental group was significantly higher than that in the control group (P ＜ 0.01) after the treatment.After treatment of 4 weeks,erector spinae median frequency (MF) values(84.84 ± 12.78) and erector spinae average amplitude (AEMG) value (108.94 ± 24.70) in the experimental group were significantly improved(P ＜ 0.05),so did the multifidus muscles MF value(95.63 ± 16.35) of affected side.There was no significant difference between the affected and unaffected side (P ＞ 0.05).Moreover,the MF values of the experimental group were significantly higher than that the control group (P ＜ 0.05) after treatment.There was significant difference between the average AEMG values of erector spinae of affected side before and after treatment (P ＜ 0.05).Conclusions Core stability exercise can further alleviate the symptoms of lumbar disc herniation after conventional traction physiotherapy.It improves the fatigue tolerance of the back's core muscles and relieves functional imbalance of the multifidus muscles.However,the time of therapy should be lengthened to study its effect on strengthening lumbar muscles. Key words: Lumbar disc herniation; Lumbar muscles; Core stability exercise; Surface electromyography

Exploratory study of electromyographic behavior of the vastus medialis and vastus lateralis at neuromuscular fatigue onset

This study aimed to determine and analyze the neuromuscular fatigue onset by median frequency (MDF) and the root mean square (RMS) behavior of an electromyographic signal (EMG). Eighteen healthy men with no prior knee problems initially performed three maximum voluntary isometric contractions (MVIC). After two days of MVIC test, participants performed a fatiguing protocol in which they performed submaximal knee-extension contractions at 20% and 70% MVIC held to exhaustion. The MDF and RMS values from the EMG signals were recorded from the vastus medialis (VM) and the vastus lateralis (VL). Analysis of the MDF and RMS behavior enabled identification of neuromuscular fatigue onset for VM and VL muscles in 20% and 70% loads. Alterations between the VM and VL in the neuromuscular fatigue onset, at 20% and 70% MVIC, were not significant. These findings suggest that the methodology proposal was capable of indicating minute differences sensible to alterations in the EMG signals, allowing identification of the moment when the MDF and the RMS showed significant changes in behavior. The methodology used was also a viable one for describing and identifying the neuromuscular fatigue onset by means of the analysis of EMG signals.

Análise da fadiga muscular localizada em idosas caidoras e não caidoras através de parâmetros de frequência do sinal eletromiográfico

One of the problems that most concerns the elderly population is the falling, which can be caused by muscle fatigue. The objective of this study was to compare median electromyographic frequency values for the vastus lateralis muscle and the lateral portion of the gastrocnemius muscle (as parameters of electromyographic fatigue) in elderly people with and without a history of falls. A total of 20 healthy, physically active, elderly women who had or had not suffered falls were enrolled on the study. Median electromyographic signal frequencies were analyzed for the vastus lateralis muscle and the lateral portion of the gastrocnemius muscle in isometric contraction. ANOVA and Student’s t test were used for comparisons, to a cutoff of p ≤ 0.05. Median frequencies for the gastrocnemius and vastus lateralis muscles were both higher in the group with a history of falling, but without statistical significance. It was also observed that the rate of decline in median frequency was greater in the group with a history of falling. It can be concluded that elderly people with a history of falling have a greater tendency to fatigue of the gastrocnemius and vastus lateralis muscles than their peers with no history of falling.

EMG evaluation of fatigue during isometric contractions in female rowers

Relatively few studies were carried out to quantify muscle fatigue resulting from isometric contractions in elite female athletes. The purpose of this study was to evaluate fatigue profile of 30seconds duration isometric contractions using surface electromyography (EMG) in female elite rowers. The subjects were eleven healthy female athletes between 16-24 years of age. The Vastus Lateralis (VL) muscle of the dominant leg was chosen for the EMG recordings. Experimental set up was designed in accordance to the rowing sport. While the hip joints for all the subjects were brought to a 100 flexion, the knee joints were brought to a 90 flexion. The range of the knee joint angle (15) during the movement was set from 90 to 105 for each subject. The maximal value of MVC was used as the reference value to determine a load of 75% of MVC for each subject. The median frequency (MDF) and the mean frequency (MNF) of the power spectrum and Root Mean Square (RMS) were computed for the surface EMG signal. Least squares line fittings were computed for time series of each parameter to find initial and final values of MDF, MNF and RMS parameters. These values were compared by Wilcoxon test. Significant decreases were found between initial and final values for both MDF and MNF (p<0.01). Also, significant decrease (p<0.01) was found between initial and final RMS. The shift of the EMG power spectrum to lower frequency content has been reported in the literature accompanied by an increase of RMS values. As only few studies have been carried out with women subjects, our RMS results may indicate a special compensatory strategy of muscle load sharing or differences in muscle fiber content in these female rowers.

Effect of occlusal splints for the management of patients with myofascial pain: a randomized, controlled, double-blind study

Background Occlusal splints have been the preferred modalities in the management of myofascial temporomandibular disorders (TMDs), but now controversy exists in reporting whether they are successful for TMDs treatments. The aim of this study was to give objective evidence to the assessment of treatment effect of occlusal splints for myofascial TMDs patients by clinical assessments and surface electromyography (sEMG) measurements of masseter muscles (MM). Methods Thirty-six patients (12 males and 24 females) aged 16-57 (38±11) years participated in the study. All participants diagnosed with myofascial TMD were randomized into two groups (18 of each). Patients in the first group (A) were treated with occlusal splints for 1 month, while patients in the second group (B) were treated with placebo (non-occluding palatal) splints. Clinical assessments were performed at the beginning of the study and 1 month after treatment. sEMG measurements for MM were performed at mandibular postural position (MPP) and maximum intercuspal contacted position (ICP) 1 month after the treatment. The root mean square (RMS) and the median frequency (MF) as linear indices of sEMG data were used to demonstrate muscle activity and muscle fatigue. Data were analyzed by ANOVA and post hoc SNK test. The differences were considered significant at P &lt;0.05. Results It was found that 89% of group A either completely recovered (39%) or clinically improved (50%), while only 22% of group B had a spontaneous improvement. sEMG analysis showed that at MPP, the mean of RMS value of MM in group A was lower than that of group B, which shows statistical differences (P &lt;0.01). At ICP, the RMS value of MM in group A was higher than that of group B, which shows statistical differences (P &lt;0.01). At MPP, MF value of MM in group A was higher than that of group B (P &lt;0.05). At ICP, MF value of MM was lower than that of group B (P &lt;0.01). Conclusions Occlusal splint could eliminate or improve the signs and symptoms of TMD patients with myofascial pain. sEMG analysis indicates that the wearing of occlusal splints may reduce the degree of fatigue of the masticatory muscles. The splint therapy outcome has a correlation with the electromyographic changes in the masticatory muscles.

Electrophysiologic changes with incremental exercise in obstructive sleep apnea

In patients with obstructive sleep apnea (OSA), intermittent apnea and hypopnea might cause different adaptations in inspiratory and peripheral muscles. In this study we aimed to determine the changes that occur in muscle activation characteristics during incremental exercise testing in patients with severe OSA. Surface electromyography of inspiratory muscles and knee extensors was performed. Eleven men with severe OSA and 11 matched controls were recruited. Changes in muscle activity were compared by determining root mean square (RMS) and median power frequency (MPF) values obtained at different exercise intensities. The ratios of RMS to oxygen consumption in inspiratory muscles and vastus lateralis increased significantly at peak workload in the control group (P < 0.05), but not in the OSA group. Patients with severe OSA demonstrated an inability to increase motor unit recruitment of inspiratory muscles and knee extensors during incremental exercise.

Facial Pain Associated With Fibromyalgia Can Be Marked by Abnormal Neuromuscular Control: A Cross-Sectional Study

Temporomandibular disorder (TMD) development in fibromyalgia syndrome (FMS) is not yet fully understood, but altered neuromuscular control in FMS may play a role in triggering TMD. The purpose of this study was to verify the association between neuromuscular control and chronic facial pain in groups of patients with FMS and TMD. A cross-sectional study was conducted. This study involved an analysis of facial pain and electromyographic activity of the masticatory muscles in patients with FMS (n=27) and TMD (n=28). All participants were evaluated according to Research Diagnostic Criteria for Temporomandibular Disorders and surface electromyography (SEMG). Myoelectric signal calculations were performed using the root mean square and median frequency of signals. The data revealed premature interruption of masticatory muscle contraction in both patient groups, but a significant correlation also was found between higher median frequency values and increased facial pain. This correlation probably was related to FMS because it was not found in patients with TMD only. Facial pain and increased SEMG activity during mandibular rest also were positively correlated. Temporal conclusions cannot be drawn from the study. Also, the study lacked a comparison group of patients with FMS without TMD as well as a control group of individuals who were healthy. Altered neuromuscular control in masticatory muscles may be correlated with perceived facial pain in patients with FMS.

Mean and Median Frequency of EMG Signal to Determine Muscle Force based on Time-Dependent Power Spectrum

The analysis of EMG signals can be generally divided into three main issues, i.e., muscle force, muscle geometry and muscle fatigue. Recently, there are no universal indices that can be applied for all issues. In this paper, we modify the global fatigue indices, namely mean frequency (MNF) and median frequency (MDF), to be used as a muscle force and fatigue index. Due to a drawback of MNF and MDF that it has a non-linear relationship between muscle force and feature value, especially in large muscles and in cyclic dynamic contractions. A time-dependence of MNF and MDF (TD-MNF and TD-MDF) is computed for dynamic contractions. Subsequently, a slope of the regression line that fits maximum values of MDF (and MNF) during a number of cyclic contractions is used as a fatigue index. To be additionally used as a muscle force index, some suitable ranges of TD-MNF and TD-MDF should be selected and five effective statistical parameters including mean, median, variance, root mean square and kurtosis, were applied to the selected range. From the experiments, the performance of TD-MNF is definitely better than that of TD-MDF. The results showed that mean and median features of the selected TD-MNF series have a better linear relationship with muscle force (load level) compared to the traditional methods and have a significant difference (p<0.001) between feature values for different loading conditions. Moreover, there is a certain pattern of TD-MNF for all trials and subjects that has not been found in traditional MNF. TD-MNF is optimized when an overlapping consecutive window method is performed with a 384-sample window-size and a 192-sample window-increment. In total, mean and median features of the selected TD-MNF series can be used as a muscle force and fatigue index. In future works, the proposed method can be used instead of using multiple features for the EMG signal analysis.

Study on the description method of upper limb’s muscle force levels during simulated in-orbit operations

The dexterous upper limb serves as the most important tool for astronauts to implement in-orbit experiments and operations. This study developed a simulated weightlessness experiment and invented new measuring equipment to quantitatively evaluate the muscle ability of the upper limb. Isometric maximum voluntary contractions (MVCs) and surface electromyography (sEMG) signals of right-handed pushing at the three positions were measured for eleven subjects. In order to enhance the comprehensiveness and accuracy of muscle force assessment, the study focused on signal processing techniques. We applied a combination method, which consists of time-, frequency-, and bi-frequency-domain analyses. Time- and frequency-domain analyses estimated the root mean square (RMS) and median frequency (MDF) of sEMG signals, respectively. Higher order spectra (HOS) of bi-frequency domain evaluated the maximum bispectrum amplitude (Bmax), Gaussianity level (Sg) and linearity level (Sl) of sEMG signals. Results showed that Bmax, Sl, and RMS values all increased as force increased. MDF and Sg values both declined as force increased. The research demonstrated that the combination method is superior to the conventional time- and frequency-domain analyses. The method not only described sEMG signal amplitude and power spectrum, but also deeper characterized phase coupling information and non-Gaussianity and non-linearity levels of sEMG, compared to two conventional analyses. The finding from the study can aid ergonomist to estimate astronaut muscle performance, so as to optimize in-orbit operation efficacy and minimize musculoskeletal injuries.

Effect of 808 nm low-level laser therapy in exercise-induced skeletal muscle fatigue in elderly women

Aging process involves several structural changes in muscle tissue which lead to decrease in musculoskeletal function. One of the most common physiological modifications is the increase in fatigability in elderly people, which leads to inability to maintain strength and motor control. In this context, low-level laser therapy (LLLT) has demonstrated positive results in reducing fatigue during physical exercise. Thus, this study aimed to investigate the effects of LLLT on skeletal muscle fatigue in elderly women. Twenty-four subjects divided in two groups entered a crossover randomized triple-blinded placebo-controlled trial. Active LLLT (808nm wavelength, 100mW, energy 7J) or an identical placebo LLLT was delivered on the rectus femoris muscle immediately before a fatigue protocol. Subjects performed a fatigue protocol which consisted of voluntary isotonic contractions of knee flexion-extension performed with a load corresponding to 75% of 1-MR (Maximum Repetition) during 60s. Surface electromyography (SEMG) signals were recorded from rectus femoris muscle of dominant lower limb to evaluate peripheral fatigability using median frequency analysis of SEMG signal. The number of repetitions of flexion-extension during fatigue protocol was also compared between groups. The values of median frequency were used to calculate the slope coefficient. The results showed no difference in the slope comparing placebo LLLT and active LLLT groups (p = 0.293). However, a significant difference was observed in the number of repetitions between groups, after active LLLT, subjects demonstrated significantly higher number of repetitions (p = 0.047). In this study, LLLT was efficient in increasing the mean number of repetitions during knee flexion-extension exercise, although results have not shown delay electromyographic fatigue.

Extracting Temporal and Spectral Parameters from Surface Electromyography Signals during a Fatigue Contraction

This paper presents findings from a study of five healthy subjects performing 50% maximum voluntary contraction until complete fatigue of the muscle. An overlapping window technique was used to find the values for mean frequency (MNF), median frequency (MDF) of the power spectrum, root mean square (RMS) and muscle fibre conduction velocity (MFCV). The surface electromyography signal (sEMG) was collected from the vastus lateralis muscle using a three channel Laplacian electrode. The results show the MNF and MDF values showed a consistent trend with each other where they remained at steady values between 20-30% and 75-80% of the signal after which they fell 15-30% of this value. The RMS showed a linear increase in value. The MFCV showed a similar trend to that found in the MNF and MDF values. 

복부생체전기신호를 이용한 운동 분석 시스템 개발

기존의 운동량 측정방법들은 가속도 센서나 GPS, 심장박동, 체온측정 등의 정보를 이용하였으나, 각기 측정방식 및 측정환경 등의 제한으로 인해 정확한 신체활동 측정 및 분석에 어려움이 있었다. 이러한 단점을 극복하기 위해 본 논문에서는, 운동시 발생하는 생체전기신호를 이용하여 유산소운동은 물론 기존에 측정이 어려웠던 근력운동에 대한 분석도 가능한 시스템을 개발하였다. 운동을 분석하기 위해 두개의 전극이 부착된 허리벨트를 착용해 운동 중 복부에서 발생하는 생체전기신호를 기록했고, 측정된 생체전기신호는 각각 상체 움직임 및 근육활동을 대표할 수 있는 주파수 대역으로 분리한 후, 분리된 각 신호의 파워 값과 차분의 파워 값, 그리고 중간주파수 값들을 운동형태 구분을 위한 특징값으로 추출하였다. 일원분산분석과 다중비교 분석의 통계적 검증을 통하여 추출된 특징값들의 유의성을 검증하였고, 또한 SVM분류기를 이용하여 운동의 형태를 구분하였다. 여섯 가지의 세부운동들을 분류하기 위해 두 가지의 분류방법을 적용하였고, 그 결과 유산소운동과 근력운동으로 분류 시 100%, 유산소운동과 근력운동 및 복합운동으로 분류한 경우 92.7%의 구분율을 보이며 운동형태의 분류가 가능하였다. 또한 유산소운동 및 근력운동의 양을 각각 수치화하여 표현 가능하다. 본 시스템은 기존의 유산소운동 기반의 운동량 측정방식대비 추가적으로 근력운동의 분석이 가능해짐에 따라 보다 다양한 활동에 대해서도 분석이 가능하다.