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1.
J Nurs Care Qual ; 37(1): 68-74, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-34261088

RESUMO

BACKGROUND: Mobility is a vital function of human life. Nurses have an essential role in preventing hospitalized patient complications through movement and ambulation. PURPOSE: This study examined the integration, accuracy, and precision of a paper-based mobility/ambulation tool into an electronic health record (EHR) to assess inpatient mobility/ambulation status. METHODS: This multisite mixed-methods study was a time-series correlational evaluation of a mobility/ambulation tool into the EHR. RESULTS: Sustainability data revealed strong correlations between nurse responses and EHR levels (r = 0.602; scores r = 0.624). Cronbach's α values were 0.737 and 0.761. Nurses' anecdotes supported the findings. CONCLUSION: Findings revealed that the EHR-Mobility Ambulation Tool is a valid, reliable, and stable tool. EHR-generated scores can assist in reducing charting burden, care planning, and inform the interdisciplinary health team at all patient care stages. Tool adoption could potentially assist nurses plan interventions suitable to maintain or increase hospitalized patients' mobility status and contribute to discharge planning.


Assuntos
Registros Eletrônicos de Saúde , Caminhada , Atenção à Saúde , Eletrônica , Corpo Humano , Humanos
2.
Appl Ergon ; 98: 103587, 2022 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-34547577

RESUMO

Anterior load carriage is common in occupational work and daily activities. Our primary purpose was to systematically review previous work concerning the biomechanics of walking with anterior load carriage. A secondary goal was to conduct a meta-analysis on common gait parameters relevant to front load carriage. An electronic database search yielded eight qualified articles. Meta-analyses were performed for four gait variables: stride length, heel contact velocity, required coefficient of friction, double support time. When possible, subgroup analyses by age were conducted. Results suggest that walking with front load carriage may shorten the stride length, particularly among young adults, but has small effects on the other three variables. Findings should be interpreted with caution given the limited number of studies included and small sample size per study. Future work investigating these four variables and others is needed to further our understanding of the impact of front load carriage on gait.


Assuntos
Marcha , Caminhada , Fenômenos Biomecânicos , Fricção , Humanos , Suporte de Carga , Adulto Jovem
3.
Appl Ergon ; 98: 103593, 2022 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-34600306

RESUMO

Exoskeletons have the potential to assist users and augment physical ability. To achieve these goals across users, individual variation in muscle activation patterns when using an exoskeleton need to be evaluated. This study examined individual muscle activation patterns during walking with a powered ankle exoskeleton. 60% of the participants were observed to reduce medial gastrocnemius activation with exoskeleton powered and increase with the exoskeleton unpowered during stance. 80% of the participants showed a significant increase in tibialis anterior activation upon power addition, with inconsistent changes upon power removal during swing. 60% of the participants that were able to adapt to the system, did not de-adapt after 5 min. Muscle activity patterns differ between individuals in response to the exoskeleton power state, and affected the antagonist muscle behavior during this early adaptation. It is important to understand these different individual behaviors to inform the design of exoskeleton controllers and training protocols.


Assuntos
Exoesqueleto Energizado , Robótica , Tornozelo , Articulação do Tornozelo , Fenômenos Biomecânicos , Eletromiografia , Marcha , Humanos , Músculo Esquelético , Caminhada
4.
Licere (Online) ; 24(02): 624-665, 20210630. ilus
Artigo em Português | LILACS | ID: biblio-1291517

RESUMO

Neste artigo serão abordadas algumas questões relativas às mudanças na razão e na sensibilidade do trato do ser humano com o mundo natural e que possam fornecer alguns indícios do apreço que os indivíduos, na atualidade, têm acerca de realizaram caminhadas pelo campo, considerando os séculos XVIII e XIX como ápice desse processo de transformação da mentalidade.


In this article, some issues related to changes in the reason and sensitivity of the human being's treatment with the natural world will be approached, which may provide some indications of the appreciation that individuals, at present, have about undertaking walks in the countryside, considering the 18th and 19th centuries as the culmination of this mentality transformation process.


Assuntos
Caminhada
5.
J Nutr Sci Vitaminol (Tokyo) ; 67(5): 330-338, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-34719619

RESUMO

The Dietary Reference Intakes 2020 divided the older population into those aged 65-74 y and those over 75 y old. However, physical activity level in each age group was not specified. This study examined age-related differences in physical activity level among healthy Japanese older people, and the effect of lifestyles on these differences. In total, 70 people (22 men, 48 women) aged 65-85 y old participated in this study. Total energy expenditure was measured using the doubly labeled water method, and basal metabolic rate using expired gas concentration and volume. The Physical Activity Scale for the Elderly and a triaxial accelerometer were used to assess physical activities. Physical activity level was significantly higher among 65-74 y old (median 1.86) than those over 75 y old (1.76). However, the Physical Activity Scale for the Elderly did not show any significant differences between the age groups. The duration of physical activity with 3.0-5.9 metabolic equivalents was longer for both locomotive and household activities among 65-74 y old than those over 75 y old. Younger participants walked a median of 6,364 steps a day, compared with 4,419 steps for older people. The 65-74 y old participants involved in paid work or who habitually exercised, and those over 75 y old taking more than 40 min a day of moderate to vigorous physical activity, and walking more than the median level for their sex and age group had significantly higher physical activity levels.


Assuntos
Metabolismo Energético , Exercício Físico , Idoso , Feminino , Nível de Saúde , Humanos , Japão , Masculino , Caminhada
6.
Wiad Lek ; 74(9 cz 1): 2128-2137, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-34725289

RESUMO

OBJECTIVE: The aim: In this study, we present a sub-analysis of physical functionality in sufferers of mild knee osteoarthritis (OA) following a clinical assessment of a novel nutraceutical supplement Tregocel® complementary to standard treatment. PATIENTS AND METHODS: Materials and methods: We evaluated the results of a multicenter, open-label, single-arm efficacy and safety evaluation of a polyherbal nutraceutical, performed in subjects with symptomatic, mild knee OA (n = 107, 59.7 ± 10.8 yrs, 68.2% female) over 36 weeks. Physical function was assessed using a standardized walking challenge (6-min walk test), combined with WOMAC indices and leg flexion measurements. Sub-analysis was performed using a linear mixed model that tracked changes in the walking challenge outcomes over time, adjusted for age, gender, and OA duration. RESULTS: Results: Walking distance was significantly improved with the duration of nutraceutical use, increasing by 0.72 m (95% CI: 0.56, 0.88) per week of product administration. Similarly, there were significant decreases in WOMAC indices per week for stiffness (-1.6, 95% CI: -1.8, 1.4), daily functioning (-13.5, 95% CI: 14.9, 11.9) and global outcome (-19.2, 95% CI -21.3 - -17.1). Furthermore, supine heel-to-high flexion distance was improved relative to the duration of nutraceutical use. CONCLUSION: Conclusions: The use of a polyherbal nutraceutical resulted in clinical improvements in several indices of physical functioning in mild knee OA suffers. Trial registration: NCT03636035.


Assuntos
Osteoartrite do Joelho , Suplementos Nutricionais , Feminino , Humanos , Masculino , Osteoartrite do Joelho/tratamento farmacológico , Amplitude de Movimento Articular , Resultado do Tratamento , Caminhada
7.
Artigo em Inglês | MEDLINE | ID: mdl-34748495

RESUMO

Walking disorders are common in post-stroke. Body weight support (BWS) systems have been proposed and proven to enhance gait training systems for recovering in individuals with hemiplegia. However, the fixed weight support and walking speed increase the risk of falling and decrease the active participation of the subjects. This paper proposes a strategy to enhance the efficiency of BWS treadmill training. It consists in regulating the height of the BWS system to track the height of the subject's center of mass (CoM), whereby the CoM is estimated through a long-short term memory (LSTM) network and a locomotion recognition system. The LSTM network takes the walking speed, body-height to leg-length ratio, hip and knee joint angles of the hemiplegic subjects' non-paretic side from the locomotion recognition system as input signals and outputs the CoM height to a BWS treadmill training robot. Besides, the hip and knee joints' ranges of motion are increased by 34.54% and 25.64% under the CoM height regulation compared to the constant weight support, respectively. With the CoM height regulation strategy, the stance phase duration of the paretic side is significantly increased by 14.6% of the gait cycle, and the symmetry of the gait is also promoted. The CoM height kinematics by adjustment strategy is in good agreement with the mean values of the 14 non-disabled subjects, which demonstrated that the adjustment strategy improves the stability of CoM height during the training.


Assuntos
Reabilitação do Acidente Vascular Cerebral , Caminhada , Teste de Esforço , Terapia por Exercício , Marcha , Humanos
8.
NeuroRehabilitation ; 49(3): 375-389, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-34776432

RESUMO

BACKGROUND: No general recommendations are yet available for the application of robot-assisted treadmill therapy for children with cerebral palsy regarding the length and intensity of the intervention. OBJECTIVE: The aim of the study was to evaluate patient-specific determinants of responsiveness to robot-assisted gait training (RAGT) in patients with bilateral spastic cerebral palsy. METHOD: During 12 months, the patients underwent 1-4 blocks of RAGT, representing 16-82 TUs. The following parameters were evaluated before (V0) and after each therapeutic block (V1-V4): dimension A (lying and rolling), B (sitting), C (crawling and kneeling), D (standing), E (walking, running and jumping) of the Gross Motor Function Measure (GMFM-88). We evaluated the change in motor functions in relation to the severity of disability, age, gender and number of therapeutic units. RESULTS: Ninety-seven patients aged between 3.7 and 27 years (mean age 10.02 years (SD±5.29); Gross Motor Function Classification System level I [n = 5], II [n = 25], III [n = 48], IV [n = 19]) underwent 16-82 TUs (overall average number 34.06 TUs, SD±16.41) of RAGT. In the patient group, we recorded clinically meaningful improvement and statistically significant improvement (p < 0.001) in gross motor functions with gradual increase in the effect size after each therapeutic block. Using correlation and regression analysis, we found a statistically significant associations between the number of therapeutic units, severity of disability, and improvement in motor functions after RAGT. CONCLUSION: We have identified two determinants -the severity of disability and the number of therapeutic units -which could have a decisive and predictive character in setting rehabilitation/designing programmes. The duration of the applied RAGT period, frequency and intensity could be a crucial factor for the potential of improvement in children with BS-CP.


Assuntos
Paralisia Cerebral , Robótica , Adolescente , Adulto , Criança , Pré-Escolar , Terapia por Exercício , Marcha , Humanos , Caminhada , Adulto Jovem
9.
Zhonghua Liu Xing Bing Xue Za Zhi ; 42(8): 1407-1412, 2021 Aug 10.
Artigo em Chinês | MEDLINE | ID: mdl-34814561

RESUMO

Objective: To investigate the incidence of traffic injuries among children aged 0-17 years in 28 counties of 6 provinces and to provide prevention suggestions. Methods: Using the general survey method, a questionnaire survey was conducted on the road traffic injuries of children in 28 counties of 6 provinces in 2017. Results: A total of 204 628 students were surveyed, 908 of whom had experiences of road traffic injuries. Road traffic injuries were 0.44% among children in 28 counties of 6 provinces in China and 0.94% among children who did not attend kindergartens. July is a high incidence period of road traffic injuries among children (12.92%). When children suffer from road traffic injuries, the first three activities were playing (21.61%), riding an electric bicycle (20.40%), walking (20.07%). Most injuries appeared as contusion/abrasion, accounting for 42.26% of the total cases. The injured parts were mainly lower limbs, upper limbs, and heads, accounting for 38.85%, 23.29%, and 20.20%. Most children with road traffic injuries recovered after related treatments, accounting for 85.43% of all cases. The median length of hospital stay of children with road traffic injuries was seven days, and the median expense in hospitals was 3 000 Yuan (RMB). Conclusions: The incidence of road traffic injuries among males appeared higher than females, and the children who did not attend the kindergartens were the highest. During playing, riding an electric bicycle and walking were the top three activities prone to road traffic injuries.


Assuntos
Acidentes de Trânsito , Ferimentos e Lesões , Acidentes de Trânsito/prevenção & controle , Criança , China/epidemiologia , Feminino , Humanos , Masculino , Prevalência , Instituições Acadêmicas , Caminhada , Ferimentos e Lesões/epidemiologia , Ferimentos e Lesões/prevenção & controle
10.
Artigo em Inglês | MEDLINE | ID: mdl-34770241

RESUMO

The enhancement of physical activity is highly correlated with the conditions of the built environment. Walking is considered to be a fundamental daily physical activity, which requires an appropriate environment. Therefore, the barriers of the built environment should be identified and addressed. Barriers can act as external stimuli for pedestrians, so pedestrians may diversely respond to them. Based on this consideration, this study examines the feasibility of information-entropy-based behavioral analysis for the detection of environmental barriers. The physical responses of pedestrians were collected using an inertial measurement unit (IMU) sensor in a smartphone. After the acquired data were converted to behavioral probability distributions, the information entropy of each grid cell was calculated. The grid cells whereby the participants indicated that environmental barriers were present yielded relatively high information entropy values. The findings of this study will facilitate the design of more pedestrian-friendly environments and the development of diverse approaches that utilize citizens for monitoring the built environment.


Assuntos
Pedestres , Ambiente Construído , Entropia , Planejamento Ambiental , Estudos de Viabilidade , Humanos , Caminhada
11.
Sensors (Basel) ; 21(21)2021 Oct 21.
Artigo em Inglês | MEDLINE | ID: mdl-34770283

RESUMO

We present the use of a single inertial measurement unit (IMU) worn on the thigh to produce stride-by-stride estimates of walking speed and its spatiotemporal determinants (i.e., stride time and stride length). Ten healthy and eight post-stroke individuals completed a 6-min walk test with an 18-camera motion capture system used for ground truth measurements. Subject-specific estimation models were trained to estimate walking speed using the polar radius extracted from phase portraits produced from the IMU-measured thigh angular position and velocity. Consecutive flexion peaks in the thigh angular position data were used to define each stride and compute stride times. Stride-by-stride estimates of walking speed and stride time were then used to compute stride length. In both the healthy and post-stroke cohorts, low error and high consistency were observed for the IMU estimates of walking speed (MAE < 0.035 m/s; ICC > 0.98), stride time (MAE < 30 ms; ICC > 0.97), and stride length (MAE < 0.037 m; ICC > 0.96). This study advances the use of a single wearable sensor to accurately estimate walking speed and its spatiotemporal determinants during both healthy and hemiparetic walking.


Assuntos
Velocidade de Caminhada , Caminhada , Fenômenos Biomecânicos , Marcha , Humanos , Movimento (Física) , Coxa da Perna
12.
Sensors (Basel) ; 21(21)2021 Oct 26.
Artigo em Inglês | MEDLINE | ID: mdl-34770412

RESUMO

This paper reports on a force plate (FP) using mechanical springs and noncontact distance sensors. The ground reaction force (GRF) is one of the factors for clarify biomechanics, and FPs are widely used to measure it. The sensor elements of conventional FPs are mainly strain gauges. Thus, the mechanical properties of FP depend on the sensor element performance. If the FP performance must change, we must redesign the FP, including changing the sensor elements. Here, we proposed an FP that uses a measuring principle based on simple springs and noncontact sensors. The shape and performance of the proposed FP are expected to change easily. As a prototype device, we designed and fabricated an FP installed with 12 springs and four sensors for human walking. A planar coil and magnet were used as the sensor elements, and the sensor output was proportional to the vertical and horizontal displacements. The FP resonance frequency was 123 Hz, which was larger than the required specification. The calibration experiments showed that vertical and horizontal forces and moments could be measured independently. The FP's resolutions were 1.9 N and 1.4 N in the anterior-posterior and vertical directions, respectively. Furthermore, the fabricated FP measured GRF similarly to the commercial FP when a human walked on the plate. These results suggest that the proposed method will be helpful for FPs with custom-made requirements.


Assuntos
Caminhada , Fenômenos Biomecânicos , Biofísica , Humanos , Fenômenos Físicos
13.
Sensors (Basel) ; 21(21)2021 Oct 27.
Artigo em Inglês | MEDLINE | ID: mdl-34770421

RESUMO

The purpose of this retrospective study was to quantify the three-dimensional knee and ankle joint kinematics and kinetics during walking in young participants with different degrees of obesity and to identify the associated effects by stratifying the obese participants according to their BMI. Thirty-two young obese individuals (mean age 30.32 years) and 16 normal-weight age-matched individuals were tested using 3D gait analysis. Analysis of kinematic and kinetic data revealed significant differences in mechanics at knee and ankle joints in all the evaluated planes of movement. Compared to the healthy-weight participants, obese adults demonstrated less knee flexion, greater knee ab-adduction angle during the entire gait cycle and abnormalities at the knee flex-extension moment. At the ankle joint, reduced range of motion was observed together with a lower peak of ankle plantarflexor moment and power during terminal stance. These results provide insight into a potential pathway by which obesity predisposes a healthy adult for increased risk of osteoarthritis.


Assuntos
Articulação do Tornozelo , Caminhada , Adulto , Tornozelo , Fenômenos Biomecânicos , Marcha , Humanos , Articulação do Joelho , Obesidade , Amplitude de Movimento Articular , Estudos Retrospectivos
14.
Sensors (Basel) ; 21(21)2021 Oct 27.
Artigo em Inglês | MEDLINE | ID: mdl-34770437

RESUMO

The growing problem of aging has led to a social concern on how to take care of the elderly living alone. Many traditional methods based on visual cameras have been used in elder monitoring. However, these methods are difficult to be applied in daily life, limited by high storage space with the camera, low-speed information processing, sensitivity to lighting, the blind area in vision, and the possibility of revealing privacy. Therefore, wise information technology of the Med System based on the micro-Doppler effect and Ultra Wide Band (UWB) radar for human pose recognition in the elderly living alone is proposed to effectively identify and classify the human poses in static and moving conditions. In recognition processing, an improved PCA-LSTM approach is proposed by combing with the Principal Component Analysis (PCA) and Long Short Term Memory (LSTM) to integrate the micro-Doppler features and time sequence of the human body to classify and recognize the human postures. Moreover, the classification accuracy with different kernel functions in the Support Vector Machine (SVM) is also studied. In the real experiment, there are two healthy men and one woman (22-26 years old) selected to imitate the movements of the elderly and slowly perform five postures (from sitting to standing, from standing to sitting, walking in place, falling and boxing). The experimental results show that the resolution of the entire system for the five actions reaches 99.1% in the case of using Gaussian kernel function, so the proposed method is effective and the Gaussian kernel function is suitable for human pose recognition.


Assuntos
Tecnologia da Informação , Caminhada , Adulto , Idoso , Algoritmos , Feminino , Humanos , Masculino , Análise de Componente Principal , Máquina de Vetores de Suporte , Adulto Jovem
15.
Sensors (Basel) ; 21(21)2021 Oct 29.
Artigo em Inglês | MEDLINE | ID: mdl-34770524

RESUMO

Walking function disorders are typical for patients after cerebral stroke. Biofeedback technology (BFB) is currently considered effective and promising for training walking function, including in patients after cerebral stroke. Most studies recognize that BFB training is a promising tool for improving walking function; however, the data on the use of highly selective walking parameters for BFB training are very limited. The aim of our study was to investigate the feasibility of using BFB training targeting one of the basic parameters of gait symmetry-stance phase duration-in cerebral stroke patients in the early recovery period. The study included 20 hemiparetic patients in the early recovery period after the first hemispheric ischemic stroke. The control group included 20 healthy subjects. The BFB training and biomechanical analysis of walking (before and after all BFB sessions) were done using an inertial system. The mean number of BFB sessions was nine (from 8 to 11) during the three weeks in clinic. There was not a single negative response to BFB training among the study patients, either during the sessions or later. The spatiotemporal parameters of walking showed the whole syndrome complex of slow walking and typical asymmetry of temporal walking parameters, and did not change significantly as a result of the study therapy. The changes were more significant for the functioning of hip and knee joints. The contralateral hip amplitude returned to the normal range. For the knee joint, the amplitude of the first flexion increased and the value of the amplitude of hyperextension decreased in the middle of the stance phase. Concerning muscle function, the observed significant decrease in the function of m. Gastrocnemius and the hamstring muscles on the paretic side remained without change at the end of the treatment course. We obtained positive dynamics of the biomechanical parameters of walking in patients after the BFB training course. The feasibility and efficacy of their use for targeted correction need further research.


Assuntos
Reabilitação do Acidente Vascular Cerebral , Acidente Vascular Cerebral , Biorretroalimentação Psicológica , Fenômenos Biomecânicos , Marcha , Humanos , Acidente Vascular Cerebral/terapia , Caminhada
16.
Sensors (Basel) ; 21(21)2021 Nov 04.
Artigo em Inglês | MEDLINE | ID: mdl-34770643

RESUMO

This study illustrates the application of a tri-axial accelerometer and gyroscope sensor device on a trampolinist performing the walking-the-wall manoeuvre on a high-performance trampoline to determine the performer dynamic conditions. This research found that rigid vertical walls would allow the trampolinist to obtain greater control and retain spatial awareness at greater levels than what is achievable on non-rigid vertical walls. With a non-rigid padded wall, the reaction force from the wall can be considered a variable force that is not constrained, and would not always provide the feedback that the trampolinist needs to maintain the balance with each climb up the wall and fall from height. This research postulates that unattenuated vertical walls are safer than attenuated vertical walls for walking-the-wall manoeuvres within trampoline park facilities. This is because non-rigid walls would provide higher g-force reaction feedback from the wall, which would reduce the trampolinist's control and stability. This was verified by measuring g-force on a horizontal rigid surface versus a non-rigid surface, where the g-force feedback was 27% higher for the non-rigid surface. Control and stability are both critical while performing the complex walking-the-wall manoeuvre. The trampolinist experienced a very high peak g-force, with a maximum g-force of approximately 11.5 g at the bottom of the jump cycle. It was concluded that applying impact attenuation padding to vertical walls used for walking-the-wall and similar activities would increase the likelihood of injury; therefore, padding of these vertical surfaces is not recommended.


Assuntos
Acelerometria , Caminhada
17.
Sensors (Basel) ; 21(21)2021 Nov 06.
Artigo em Inglês | MEDLINE | ID: mdl-34770686

RESUMO

Spinal cord injury (SCI) patients suffer from diverse gait deficits depending on the severity of their injury. Gait assessments can objectively track the progress during rehabilitation and support clinical decision making, but a comprehensive gait analysis requires far more complex setups and time-consuming protocols that are not feasible in the daily clinical routine. As using inertial sensors for mobile gait analysis has started to gain ground, this work aimed to develop a sensor-based gait analysis for the specific population of SCI patients that measures the spatio-temporal parameters of typical gait laboratories for day-to-day clinical applications. The proposed algorithm uses shank-mounted inertial sensors and personalized thresholds to detect steps and gait events according to the individual gait profiles. The method was validated in nine SCI patients and 17 healthy controls walking on an instrumented treadmill while wearing reflective markers for motion capture used as a gold standard. The sensor-based algorithm (i) performed similarly well for the two cohorts and (ii) is robust enough to cover the diverse gait deficits of SCI patients, from slow (0.3 m/s) to preferred walking speeds.


Assuntos
Análise da Marcha , Traumatismos da Medula Espinal , Algoritmos , Marcha , Humanos , Traumatismos da Medula Espinal/diagnóstico , Caminhada , Velocidade de Caminhada
18.
Sensors (Basel) ; 21(21)2021 Nov 06.
Artigo em Inglês | MEDLINE | ID: mdl-34770691

RESUMO

The consideration of the Achilles tendon (AT) curvature is crucial for the precise determination of AT length and strain. We previously established an ultrasound-kinematic-based method to quantify the curvature, using a line of reflective foil skin markers covering the AT from origin to insertion. The current study aimed to simplify the method by reducing the number of markers while maintaining high accuracy. Eleven participants walked (1.4 m/s) and ran (2.5, 3.5 m/s) on a treadmill, and the AT curvature was quantified using reflective foil markers aligned with the AT between the origin on the gastrocnemius myotendinous-junction (tracked by ultrasound) and a marker on the calcaneal insertion. Foil markers were then systematically removed, and the introduced error on the assessment of AT length and strain was calculated. We found a significant main effect of marker number on the measurement error of AT length and strain (p<0.001). Using more than 30% of the full marker-set for walking and 50% for running, the R2 of the AT length error saturated, corresponding to average errors of <0.1 mm and <0.15% strain. Therefore, a substantially reduced marker-set, associated with a marginal error, can be recommended for considering the AT curvature in the determination of AT length and strain.


Assuntos
Tendão do Calcâneo , Corrida , Tendão do Calcâneo/diagnóstico por imagem , Fenômenos Biomecânicos , Humanos , Músculo Esquelético , Ultrassonografia , Caminhada
20.
Hum Mov Sci ; 80: 102892, 2021 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-34749196

RESUMO

The relative displacements of body segments during walking can be reduced to a small number of multi-joint kinematic patterns, pmk, through Principal Component Analysis (PCA). These patterns were extracted from two groups of children (n = 8, aged 6-9 years, 4 males, and n = 8, aged 10-13 years, 4 males) and 7 adults (21-29 years, 1 male), walking on a treadmill at various velocities, normalized to body stature (adimensional Froude number, Fr). The three-dimensional coordinates of body markers were captured by an optoelectronic system. Five components (pm1 to pm5) explained 99.1% of the original dataset variance. The relationship between the variance explained ("size") of each pmk and the Fr velocity varied across movement components and age groups. Only pm1 and pm2, which described kinematic patterns in the sagittal plane, showed significant differences (at p < 0.05) across pairs of age groups. The time course of the size of all the five components matched various mechanical events of the step cycle at the level of both body system and lower limb joints. Such movement components appeared clinically interpretable and lend themselves as potential markers of neural development of walking.


Assuntos
Marcha , Caminhada , Adulto , Fenômenos Biomecânicos , Criança , Humanos , Extremidade Inferior , Masculino , Análise de Componente Principal
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