Weight Lifting Research Articles

DETERMINATION OF FACTORS ASSOCIATED WITH LOW BACK PAIN IN A POPULATION OF CLEANING WORKERS

Objective: The aim of this research was conducted determination of factors associated with low back pain in a population of cleaning workers. Methods: The research was carried out in the cleaning workers of İzmir Konak Municipality, without reaching any sampling method, and was applied to 318 workers who agreed to work. The data were collected between February and March 2014. Introductory information form, Oswestry functional disability form and Visual analog scale (VAS) were applied to each worker. Results: In this study, according to the result of Spearman Correlation analysis, it is seen that there is a significant and positive relationship between the oswestry functional disability form and VAS. As a result of Mann Whitney U and Kruskal Wallis analysis; economic status, rolling weight lifting and carrying, leaning weight lifting and alcohol consumption were found to be risk factors for low back pain. Conclusion: Low back pain has become a global public health problem for cleaners. For workers, their health deterioration has become an economic loss. For this reason, the occupational health doctor and the occupational health nurse should make screenings to protect and improve the waist health of the employees; It should carry out studies consisting of health education, educational programs and information in a multidisciplinary approach.

Research on Dynamic Characteristics of Lifting Rope-Breaking for the Nuclear Power Crane

The nuclear power crane is an important equipment for handling operation in nuclear power plants. The nuclear power crane is equipped to complete the operation even in its own short-time rope-breaking failure state. Therefore, it is necessary to study the possible failure dynamic characteristics and safety of the nuclear power crane. The coupling modeling of the real structure and mechanism of a nuclear power crane is carried out, and the dynamic formula of its rope-breaking failure state is derived. The high-precision three-dimensional model is established, which considers the flexibility of the wire rope and simulates the winding of the wire rope in the pulley groove and the tangency contact relation between the wire rope and the pulley, so as to realize the orderly winding of the wire rope in the space between all the lifting pulleys, making the model both real and easy to solve. For the special spatial parallel winding mode of double wire ropes, the failure dynamic characteristics of the nuclear power crane when one wire rope breaks suddenly and the other one is still able to suspend the lifting weight in the air is studied. The simulation results show that one wire rope in the system fails suddenly under the condition of failure lifting, and the special wire rope winding mode makes the lifting weight remain suspended and continue to lift. From the view of the wire rope stress, the stress of the other wire rope becomes twice of the original after the sudden failure of one wire rope. At the same time, the balance lever and spring buffer device also play an effective buffering role after a sudden failure. The special winding mode of the wire rope and pulley makes the two wire ropes bear the lifting weight jointly.

Improving environment drives dynamical change in social game structure.

The development of cooperation in human societies is a major unsolved problem in biological and social sciences. Extensive studies in game theory have shown that cooperative behaviour can evolve only under very limited conditions or with additional complexities, such as spatial structure. Non-trivial two-person games are categorized into three types of games, namely, the prisoner's dilemma game, the chicken game and the stag hunt game. Recently, the weight-lifting game has been shown to cover all five games depending on the success probability of weight lifting, which include the above three games and two trivial cases (all cooperation and all defection; conventionally not distinguished as separate classes). Here, we introduce the concept of the environmental value of a society. Cultural development and deterioration are represented by changes in this probability. We discuss cultural evolution in human societies and the biological communities of living systems.

Does Footwear Influence Countermovement Jump Parameters Used to Assess Performance in Collegiate Basketball Players?

Background: The countermovement jump (CMJ) is used to monitor short- and long-term changes in neuromuscular performance, where practically relevant alteration may be subtle, requiring detailed and consistent testing protocols to limit error and allow detection of meaningful change. Collegiate basketball players often wear different types of footwear depending upon the training activity, potentially influencing CMJ performance outcomes. Objective: This study evaluated the influence of footwear on key CMJ variables used for routine performance assessments in a cohort of 11 NCAA women’s collegiate basketball players. Method: In a cross-over repeated measures study design, players performed three CMJs in Basketball-, Training-(Trainers), and Olympic Weightlifting (WL) shoes, in a randomized order during one testing session. One-way repeated measures analyses of variance (p ≤ .05) and effect sizes (Cohen’s d) were used to discern differences in CMJ variables among shoe conditions. Results: WL demonstrated greater Eccentric Mean Force (p ≤ .014, d ≥ 0.03) and lower Flight Time:Contraction Time (p ≤ .029, d ≥ 0.31), Jump Height (p ≤ .040, d ≥ 0.32), and Reactive Strength Index-Modified (p ≤ .032, d ≥ 0.40) than both Basketball and Trainers. Additionally, WL exhibited lower Concentric Mean Force (p = .018, d = 0.19), Concentric Mean Power (p = .008, d = 0.29), Eccentric Peak Force (p = .050, d = 0.19), and Flight Time (p = .036, d = 0.31) compared to Trainer. No significant differences and only trivial effects appeared between Basketball and Trainers (p > 0.05, d < 0.1). Conclusion: These findings suggest footwear significantly influences CMJ performance. WL shoes appear to negatively impact CMJ performance; however, Basketball and Trainers appear to exert negligible effects that should allow clinicians and practitioners to feel confident about measurement and data quality when performing short- and long-term CMJ measurements in either Basketball or Trainers.

Musculoskeletal Injuries Among Weight Lifters With or Without Supervision ?

Background: People nowadays have developed a new passion of weightlifting. Weightlifting focuses on vigorous muscle development. But injuries are also common in weightlifting. This study aims to compare the injury rates among supervised and non-supervised weightlifters. Methods: A group of 138 weight lifters was divided into two groups i.e. who did training under supervision and the other who did training without any supervision. Injuries related to musculoskeletal system were identified using Nordic musculoskeletal questionnaire. Data was analyzed using SPSS. Chi square test was used to see the association of musculoskeletal pain among weightlifters with or without supervision. Results: Significant association found between musculoskeletal injuries and supervision. Injuries lesser in number among supervised weightlifters as compared to unsupervised weightlifters. Mean age of weight lifters under supervision and without supervision was 21.99 (SD 3.81) and 24.64 (SD 5.01) respectively. Mean workout days /week among weight lifters under supervision was almost same i.e. 5.67 (SD .63) and was 5.62 (SD .81). Out of 51 participants who work-out for 46-60 min, 30 were not under supervision while 31 weightlifters who work-out for 61-90 min were working out under supervision. Injury rate was more in the region of shoulder in both groups supervised and unsupervised groups while hip/thigh region was less involved in both supervised and unsupervised groups. Conclusion: Overall results showed significant association between musculoskeletal injuries and supervision. Injury rate was more among weightlifters who work without supervision as compared to those who work under supervision. Care should be taken and weight lifting and exercises must be performed under expert’s supervision.

PERBEDAAN DENYUT JANTUNG DAN TEKANAN DARAH PADA ATLET PREDOMINAN AEROBIK DAN ANAEROBIK KONI JAWA BARAT TAHUN 2016

Exercise when done regularly will give big impact to the body. One of the alteration in an athlete that can be made is the cardiovascular system change. This study aimed to discover the difference of heart rate and blood pressure between aerobic predominant athlete and anaerobic predominant athlete. The study design was case-control, data collected from 80 athletes divided into 40 aerobic predominant athletes (canoe, sail, gantole, shooting, and bicycle racing) and 40 anaerobic predominant athletes (weight lifting, taekwondo, softball, tarung derajat, and rock climbing) in KONI West Java, Bandung. Sample was collected by random sampling and analyzed by T test independent. The result showed there was significant difference of heart rate between aerobic predominant athlete and anaerobic predominant athlete (p=0,0001), and lower in aerobic. There was also no significant difference of systolic blood pressure between predominant aerobic athlete and predominant anaerobic athlete (p=0,404), and was higher in anaerobic. Another result showed no significant difference of diastolic blood pressure between predominant aerobic athlete and predominant anaerobic athlete (p=0,553) and was higher in anaerobic. In conclusion, there was significant difference of the heart rate, but no difference of systolic and diastolic blood pressure between aerobic predominant and anaerobic predominant athlete.

Design and Manufacturing of Internet of Things based Mobile Application Controlled Automobile Screw Jack

The objective of our paper is to design and model a mobile application-controlled automobile screw jack using android programming as an Internet of Things platform. Today’s importance on technology expansion has projected a good design and quality product in a lesser time to ease the complicated process of human being. The development of software has become a vital in the digital world to satisfy a number of demands of the user or applications. In order to accomplish the demand of current era, the article has been modelled a design for a mobile enabled hydraulic screw jack system. The description of evolving design and signification of its industrial implication has been shown here. Screw jack used for automobiles is emerging as necessary technology expansion in the industry of automobiles to produce application that allows lifting heavy load on applying less effort. The primary importance of the design of automobile screw jack is to reduce human involvement and their contribution to lift a load. Further there is a significance increases in the efficiency of screw jack model and its designs as ergonomically, (i.e.) neglecting of the complex operating as well as positioning of the screw jack by the operators. On usage of hydraulic system and pneumatic system, the system reduces involvement to lift load on basis of the computation calculation. But in this case also complexity in the posture and position of worker during the operation remains the same here. Hence, we have to design a jack for car which is motorised for easiness of use. But somehow in any case of failure in this electronic system, then the jack will be not able to work further manually. In this work, the entire setup is administrated by mobile application which is constructed as MIT app maker and the important functionality of this project is controlled using Arduino Uno which controls all the motors by obtaining signals from the app with help of a wifi module (ESP8266), Arduino builds the code which is encoded into it by Arduino encoder. Entire assembly is propagated by 60 RPM DC motors. Importance of this model is to make system as effortless and fast response in weight lifting, further it reduces the physical fatigue felt by the weight lift operating employee. Experimental results prove that proposed model outperforms the existing Bluetooth based model on terms of the efficiency and accuracy.

Strength Development, Muscle and Tissue Damage in Different Training Models

Purpose: The aim of this study was to determine the effects of during six weeks core and weight lifting trainings on strength development, muscle and tissue damage which may occur.
 Method: The research group consisted of sixteen volunteers who participated in the same age group. Participants were divided into two groups, core training group (n: 8) and weight lifting training group (n: 8). Participants continued to the program for the group to which the belonged lasted for three days a week for six weeks. Participant’s performance measures (Back and leg strength, hand grip strength, vertical jump) were taken and blood samples were taken twice at rest before and at the end of the training sessions. AST, ALT, LDH, CK and CK-MB levels were determined in the blood samples taken. SPSS 22 package program was used in the analysis of the obtained data. Paired samples t test was used for intra-group comparisons.
 Results: When intra-group analyses are made; there were significant differences in the leg strength, vertical jump, CK and CK-MB values of the weight lifting training group, it was determined that only differences in back and leg strength values occurred in the core training group(p<0,05).
 Conclusion: As a result, both core and weight lifting training have led to some improvement in strength parameters. It can be said that especially weight lifting training also causes muscle damage as well as strength development.

A Study on Factors Affecting the Manual Material Handling Capacity of Indian Male Construction Workers

Construction is one of the most hazardous industries involving high manual labour where health and safety risks are plentiful. This study focuses on evaluating the factors affecting the material lifting capacity of Indian male construction workers. A statistical experiment was conducted on selected male construction workers, and ANOVA technique was used to analyse the influence of parameters (like age, body mass index (BMI), material lifting height and lifting frequency) on maximum allowable weight limit (MAWL). From the analysis, maximum allowable weight limit (MAWL) and minimum lifting weight were determined for every worker based on his age and BMI corresponding to three different lift frequencies and lifting heights. The results indicate that for all BMI categories, the MAWL increases with the increase in the age of workers to a certain extent, but it decreases as the age increases. Using the maximum and minimum lifting weight values obtained, it will be easy to assign manual lifting tasks for workers without compromising their health at the same time ensuring optimum utilization of their efficiency.

ROLE OF KATI BASTI AND PATRA POTTALI SWEDA IN THE MANAGEMENT OF GRIDHRASI- A CASE STUDY

The modern busy lifestyle of these days leads to several lifestyle disorders. Sciatica is one of the locomotory disorder occurs due to improper sitting posture, heavy weight lifting, stress injury and trauma to the spine. This disease became a great concern to the working people. Sciatica can be correlated with Gridhrasi in Ayurveda which is characterized as Ruk (pain), Stambha (stiffness), tingling sensation and numbness of lower limb. Gridhrasi is a type of Vatavyadhi mentioned in Ayurveda classics. Ayurveda through its advance treatment i.e. Panchakarma (Bio purification) eliminates the causative factors for disease. A male patient presented with signs and symptoms of Gridhrasi (sciatica) and MRI report suggesting of disc diffuse and disc protrusion and mild thecal compression. So In the present single case study patient was treated with Patra pottali sveda and Kati basti with some oral medicine. Both the therapies were effective in relieving symptoms like pain, stiffness, pricking sensation and numbness of leg.

Optimization of Bridge Crane Control System Using Fuzzy PID Control and Speed Control of Frequency Converter

Objective: As a carrier, bridge cranes are widely used in port cargo handling. Due to the structure of the crane itself, the load inevitably produces displacement deviation and lifting weight swing. Therefore, the optimization investigation of the bridge crane control system is carried out to guarantee the fast and secure operation of the crane. Method: According to the characteristics of bridge cranes, combined with the experience of on-site operating staff, the fuzzy rules that meet the working conditions of the site are designed by using the advantages of fuzzy PID (Proportion-Integration-Differentiation) control algorithm without relying on an accurate mathematical model, to set the parameters of the fuzzy PID controller. The speed control technique of frequency converter is adopted to design the system to improve the safety of the overall system. Results: The results show that the adjustment time of the swing angle of crane weight of the traditional PID control requires 6.79s, and the maximum swing angle of crane weight is 0.039rad, and the adjustment time under the fuzzy control is 4.89s, and the swing angle of crane weight is 0.013rad. The fuzzy PID controller surpasses the traditional PID controller in the positioning accuracy. It is not sensitive to changes in the internal parameters of the system. Also, it has strong adaptability to changes in operating conditions. The swing angle of crane weight is smaller, which further improves the robustness. The vector frequency conversion speed control has a more precise control effect on the speed and running track of the operating mechanism of the bridge crane. This method can be applied to the automatic operation mechanism of bridge cranes and achieve good control performance. Conclusion: The conducted optimization investigation of the bridge crane control system makes the control system flexible, simple and robust, providing important theoretical support for related explorations.

Psychophysiological responses to manual lifting of unknown loads.

BackgroundThe handling of unknown weights, which is common in daily routines either at work or during leisure time, is suspected to be highly associated with the incidence of low back pain (LBP).ObjectivesTo investigate the effects of knowledge and magnitude of a load (to be lifted) on brain responses, autonomic nervous activity, and trapezius and erector spinae muscle activity.MethodsA randomized, within-subjects experiment involving manual lifting was conducted, wherein 10 participants lifted three different weights (1.1, 5, and 15 kg) under two conditions: either having or not having prior knowledge of the weight to be lifted.ResultsThe results revealed that the lifting of unknown weights caused increased average heart rate and percentage of maximum voluntary contraction (%MVC) but decreased average inter-beat interval, very-low-frequency power, low-frequency power, and low-frequency/high-frequency ratio. Regardless of the weight magnitude, lifting of unknown weights was associated with smaller theta activities in the power spectrum density (PSD) of the central region, smaller alpha activities in the PSD of the frontal region, and smaller beta activities in the PSDs of both the frontal and central regions. Moreover, smaller alpha and beta activities in the PSD of the parietal region were associated only with lifting of unknown lightweights.ConclusionsUncertainty regarding the weight to be lifted could be considered as a stress-adding variable that may increase the required physical demand to be sustained during manual lifting tasks. The findings of this study stress the importance of eliminating uncertainty associated with handling unknown weights, such as in the cases of handling patients and dispatching luggage. This can be achieved through preliminary self-sensing of the load to be lifted, or the cautious disclosure of the actual weight of manually lifted objects, for example, through clear labeling and/or a coding system.

Weightlifting Is Better Than Plyometric Training to Improve Strength, Counter Movement Jump, and Change of Direction Skills in Tunisian Elite Male Junior Table Tennis Players

Kaabi, S, Mabrouk, RH, and Passelergue, P. Weightlifting is better than plyometric training to improve strength, counter movement jump, and change of direction skills in Tunisian elite male junior table tennis players. J Strength Cond Res 36(10): 2912-2919, 2022-This study aimed to compare the effect of integrating weightlifting (WL) resistance training or plyometric training for 8 weeks on physical performance among elite male junior table tennis players. Forty-five players were randomly divided into 3 groups. A WL resistance training group ( n = 15), plyometric (P) group ( n = 15), and a control (C) group ( n = 15). Weightlifting group and P group were trained for 8 weeks (2 sessions per week with 3 different exercises each time) in addition to the usual practice of table tennis during the preparatory phase, whereas the C group continued classical table tennis training sessions. Subjects were tested for 5-m sprint time, change of direction (CD) test on a 20-m "T" shape course, jumping tests such as standing long jump, squat jump (SJ) and countermovement jump, hang grip, and 1 repetition maximum strength tests as the bench press and back squat before (T0) and after (T1) the training program. There was no statistical difference between the 3 groups before the beginning of the training program. After the 8-week training program, only P and WL groups significantly improved their performances for all the tests. Combining all the tests, the WL group had larger improvement (12.6 vs. 8.2%) and effect sizes (1.88 vs. 1.22) than the P group. Thus, WL training seems more efficient than P training to improve neuromuscular performance of table tennis players, especially for a sport-specific table tennis change-of-direction test such as the 20-m CD test.

The Design and Simulation of a 16-Sensors Plantar Pressure Insole Layout for Different Applications: From Sports to Clinics, a Pilot Study.

The quantification of plantar pressure distribution is widely done in the diagnosis of lower limbs deformities, gait analysis, footwear design, and sport applications. To date, a number of pressure insole layouts have been proposed, with different configurations according to their applications. The goal of this study is to assess the validity of a 16-sensors (1.5 × 1.5 cm) pressure insole to detect plantar pressure distribution during different tasks in the clinic and sport domains. The data of 39 healthy adults, acquired with a Pedar-X® system (Novel GmbH, Munich, Germany) during walking, weight lifting, and drop landing, were used to simulate the insole. The sensors were distributed by considering the location of the peak pressure on all trials: 4 on the hindfoot, 3 on the midfoot, and 9 on the forefoot. The following variables were computed with both systems and compared by estimating the Root Mean Square Error (RMSE): Peak/Mean Pressure, Ground Reaction Force (GRF), Center of Pressure (COP), the distance between COP and the origin, the Contact Area. The lowest (0.61%) and highest (82.4%) RMSE values were detected during gait on the medial-lateral COP and the GRF, respectively. This approach could be used for testing different layouts on various applications prior to production.

Two-Dimensional Versus Three-Dimensional Symmetric Lifting Motion Prediction Models: A Case Study

Abstract Symmetric lifting is a common manual material handling strategy in daily life and is the main cause of low back pain. In the literature, symmetric lifting is mainly simulated by using two-dimensional (2D) models because of their simplicity and low computational cost. In practice, however, symmetric lifting can generate asymmetric kinetics especially when the lifting weight is heavy and symmetric lifting based on 2D models misses this important asymmetric kinetics information. Therefore, three-dimensional (3D) models are necessary for symmetric lifting simulation to capture asymmetric kinetics. The purpose of this single-subject case study is to compare the optimization formulations and simulation results for symmetric lifting by using 2D and 3D human models and to identify their pros and cons. In this case study, a 10-degrees-of-freedom (DOFs) 2D skeletal model and a 40-DOFs 3D skeletal model are employed to predict the symmetric maximum weight lifting motion, respectively. The lifting problem is formulated as a multi-objective optimization (MOO) problem to minimize the dynamic effort and maximize the box weight. An inverse dynamic optimization approach is used to determine the optimal lifting motion and the maximum lifting weight considering dynamic joint strength. Lab experiments are carried out to validate the predicted motions. The predicted lifting motion, ground reaction forces (GRFs), and maximum box weight from the 2D and 3D human models for Subject #8 are compared with the experimental data. Recommendations are given.

Exercise and Nutraceuticals: Eminent Approach for Diabetic Neuropathy.

Diabetic neuropathy is an incapacitating chronic pathological condition that encompasses a large group of diseases and manifestations of nerve damage. It affects approximately 50% of patients with diabetes mellitus. Autonomic, sensory, and motor neurons are affected. Disabilities are severe, along with poor recovery and diverse pathophysiology. Physical exercise and herbal- based therapies have the potential to decrease the disabilities associated with diabetic neuropathy. Aerobic exercises like walking, weight lifting, the use of nutraceuticals and herbal extracts are found to be effective. Literature from the public domain was studied emphasizing various beneficial effects of different exercises, herbal and nutraceuticals for their therapeutic action in diabetic neuropathy. Routine exercises and administration of herbal and nutraceuticals, either the extract of plant material containing the active phytoconstituent or isolated phytoconstituent at safe concentration, have been shown to have promising positive action in the treatment of diabetic neuropathy. Exercise has shown promising effects on vascular and neuronal health. It has proven to be well effective in the treatment as well as prevention of diabetic neuropathy by various novel mechanisms, including Herbal and nutraceuticals therapy. They primarily show the anti-oxidant effect, secretagogue, anti-inflammatory, analgesic, and neuroprotective action. Severe adverse events are rare with these therapies. The current review investigates the benefits of exercise and nutraceutical therapies in the treatment of diabetic neuropathy.

Three-dimensional asymmetric maximum weight lifting prediction considering dynamic joint strength.

In this study, the three-dimensional (3D) asymmetric maximum weight lifting is predicted using an inverse-dynamics-based optimization method considering dynamic joint torque limits. The dynamic joint torque limits are functions of joint angles and angular velocities, and imposed on the hip, knee, ankle, wrist, elbow, shoulder, and lumbar spine joints. The 3D model has 40 degrees of freedom (DOFs) including 34 physical revolute joints and 6 global joints. A multi-objective optimization (MOO) problem is solved by simultaneously maximizing box weight and minimizing the sum of joint torque squares. A total of 12 male subjects were recruited to conduct maximum weight box lifting using squat-lifting strategy. Finally, the predicted lifting motion, ground reaction forces, and maximum lifting weight are validated with the experimental data. The prediction results agree well with the experimental data and the model's predictive capability is demonstrated. This is the first study that uses MOO to predict maximum lifting weight and 3D asymmetric lifting motion while considering dynamic joint torque limits. The proposed method has the potential to prevent individuals' risk of injury for lifting.

Psychological Characteristics of Athletes at Student’s Education and Training Center in Bengkulu

The study of athletes’ psychological characteristics in the education and students training center (PLPP) Bengkulu needs to be conducted as an effort to fix athletes’ training and achievement in PLPP Bengkulu. The purpose of this study was to determine the psychological difference between male and female athletes in the education and student training center (PPLP) of Bengkulu. Type of this research was quantitative with a comparative design. The subjects in this research were 26 athletes, namely 6 athletic athletes, 4 weight lifting athletes, 8 wrestling athletes, 4 karate athletes, and 4 boxing athletes. The data collection technique was conducted with the psychological skills inventory for sports that adopted from Mahoney, Gabriel & Perkins, (1987). Validity of the instrument is 0,21–0,35 and the reliability is 0,890. Data were analyzed using t-test with a significant level of 0.05. Based on the results of data analysis, it can be seen that male athletes have a mean of 133.52 while female athletes have a mean value of 142.72 and significant value 0f 0,60>0.05. From results of this research, it was concluded that there were no difference in the psychological characteristics between male and female athletes in the education and students training center (PPLP) of Bengkulu. For the next researcher is expected to able using more samples and adding other research variables such as training of psychological skill and athletes personalities.

Shoulder Impingement (Care of the Young Athlete)

Patient Education| 2021 Shoulder Impingement (Care of the Young Athlete) Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Share Icon Share Facebook Twitter LinkedIn Tools Icon Tools Get Permissions Cite Icon Cite Search Site Citation Shoulder Impingement (Care of the Young Athlete). Pediatric Patient Education 2021; 10.1542/peo_document568 Download citation file: Ris (Zotero) Reference Manager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search nav search search input Search input auto suggest search filter All AAP SitesAll PublicationsPediatric Patient Education Search Advanced Search Subjects: Care of the Young Athlete Topics: athlete, shoulder region, pain Shoulder impingement is an overuse injury that causes achy pain on the front or side of the shoulder. The pain is felt most when the arm is overhead or extended to the side. Shoulder impingement also is called rotator cuff tendonitis, subacromial impingement, supraspinatus tendonitis, and shoulder bursitis. Shoulder impingement is common in swimmers and athletes who play baseball, tennis, and volleyball. It can also occur in weight lifters, gymnasts, divers, and rowers. Causes include a rapid increase in overhead activity, weakness or strength imbalance in the rotator cuff or scapular muscles, postural abnormalities, shoulder joint instability, or improper training or technique. The following is information from the American Academy of Pediatrics summarizing treatment phases and goals for shoulder impingement. Treating shoulder impingement involves limiting activities that cause pain and using ice and nonsteroidal anti-inflammatory drugs (NSAIDs) to... © 20122012 American Academy of Pediatrics. Reviewed 7/2020. All rights reserved. You do not currently have access to this content.

Research on emotion recognition method of weightlifters based on a non-negative matrix decomposition algorithm

In order to overcome the problems of high recognition error rate and low recognition efficiency existing in the traditional method of emotional recognition of weightlifters, a method of emotional recognition of weightlifters based on a non-negative matrix decomposition algorithm is proposed. The database of emotion recognition matching criteria is established, and the mapping relationship among emotion, facial expression of far mobilisation and weight lifting posture is formed. The real-time motion images of weightlifters are collected, and the image classifier is designed by using the non-negative matrix decomposition algorithm. The real-time images are divided into facial expression images and whole body motion images, and the features of the two images are extracted respectively. The extracted results are matched with the results of the standard database, and the real-time emotion recognition results of weightlifters are obtained. The experimental results show that compared with the traditional emotion recognition method, the proposed method improves the accuracy of emotion recognition by 50%.