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BACKGROUND: Stair-climbing (SC) is an essential daily life skill, and stair-climbing exercise (SCE) serves as a valuable method for promoting physical activity in older adults. This study aimed to compare the impact of SCEs with heel contact (HC) and heel off (HO) during SC on functional mobility and trunk muscle (TM) activation amplitudes in community-dwelling older adults. METHODS: In the pilot randomized controlled trial, participants were randomly allocated to either the HC group (n = 17; mean age 75.9 ± 6.3 years) or the HO group (n = 17; mean age 76.5 ± 4.6 years). The HC participants performed SCE with the heel of the ankle in contact with the ground, while the HO participants performed SCE with the heel of the ankle off the ground during SC. Both groups participated in progressive SCE for one hour per day, three days per week, over four consecutive weeks (totaling 12 sessions) at the community center. We measured timed stair-climbing (TSC), timed up and go (TUG), and electromyography (EMG) amplitudes of the TMs including rectus abdominis (RA), external oblique (EO), transverse abdominus and internal oblique abdominals (TrA-IO), and erector spinae (ES) during SC before and after the intervention. RESULTS: Both groups showed a significant improvement in TSC and TUG after the intervention (P < .01, respectively), with no significant difference between the groups. There was no significant difference in the EMG activity of the TMs between the groups after the intervention. The amplitude of TMs significantly decreased after the intervention in both groups (P < .01, respectively). CONCLUSION: Both SCE methods could improve balance and SC ability in older adults while reducing the recruitment of TMs during SC. Both SCE strategies are effective in improving functional mobility and promoting appropriate posture control during SC in older adults.
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Eletromiografia , Vida Independente , Subida de Escada , Humanos , Idoso , Masculino , Projetos Piloto , Feminino , Subida de Escada/fisiologia , Idoso de 80 Anos ou mais , Tronco/fisiologia , Músculo Esquelético/fisiologiaRESUMO
BACKGROUND: As individuals age, they experience a decline in muscle strength and balance, leading to diminished functional capacity and an increased risk of falls. The purpose of the current study was to investigate the effects of the Taekkyon-based exercise program on balance, muscle strength, and gait ability in women aged over 65-year-old residing in the local community. METHODS: Forty-eight subjects were randomly allocated into the Taekkyon-based exercise program as an experimental group (EGâ =â 25; mean age: 71.68â ±â 3.26) or a fall prevention program as a control group (CGâ =â 23; mean age: 73.65â ±â 5.88). EG participants received 1-hour Taekkyon exercise sessions twice a week for 12 consecutive weeks. CG participants received a typical fall prevention program. The measurements in each group included assessments of balance levels (the timed up-and-go test, one-leg stance, and functional reach test), lower extremity strength (the 5-chair stand test and 30-second chair stand test), and gait parameters (cadence, step length, step width, stride length, stride time, and gait velocity) before and after the intervention. RESULTS: After the intervention, balance (timed up-and-go test, one-leg stance, and functional reach test), lower extremity strength (5-chair stand test and 30-second chair stand test), and gait parameters (cadence, stride time, and gait velocity) showed a significant improvement in EG participants compared to CG participants (Pâ <â .05). Compared to the normal value of balance ability and strength of elderly women over 65 years of age, most outcomes were greater than average normal values for those receiving Taekkyon exercise. CONCLUSION: Taekkyon-based exercise program was more effective in improving balance, lower extremity strength, and gait capacity than the usual fall prevention program in elderly women over 65 years of age. Its effects can approach normal values for women in this age group. The 12-week Taekkyon-based exercise program could be useful as part of a fall prevention program to elderly people.
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Terapia por Exercício , Vida Independente , Idoso , Humanos , Feminino , Equilíbrio Postural/fisiologia , Marcha/fisiologia , Força Muscular/fisiologia , Acidentes por Quedas/prevenção & controle , Extremidade InferiorRESUMO
BACKGROUND: Psoriasis itself, as well as its immunomodulatory drugs, may alter the immune system, increasing the risk of infections. Recent research has indicated that patients with psoriasis are at an increased risk of developing severe infections including tuberculosis. OBJECTIVES: To evaluate and compare the incidence of serious infectious diseases in Korea between patients with psoriasis and participants without psoriasis regarding each treatment modality. MATERIALS & METHODS: This nationwide cohort study utilized claims data based on the National Health Insurance Service between January 2005 and December 2018. RESULTS: In total, 293,073 patients with psoriasis enrolled for the analysis of serious infection and 272,400 patients enrolled for the analysis of tuberculosis. Participants without psoriasis matched by age and sex (1:1 ratio) were also enrolled. For serious infection overall, the adjusted hazard ratios (aHRs) (95% confidence interval [CI]) were 1.21 (1.20-1.23), 1.23 (1.17-1.28), and 1.33 (1.09-1.63) for the non-systemic, non-biologic systemic, and biologic groups, respectively. For tuberculosis overall, the aHRs were 1.15 (1.10-1.20), 1.32 (1.10-1.57), and 6.72 (4.28-10.56) for the non-systemic, non-biologic systemic, and biologic groups, respectively. CONCLUSION: This study reveals that the risk of serious infection and tuberculosis in patients with psoriasis was significantly higher than in participants without psoriasis. Moreover, patients with psoriasis who received systemic therapy other than phototherapy had a higher risk of these infections compared to those without psoriasis. Also, biologics appeared to increase the risk of tuberculosis in patients with psoriasis. Dermatologists should consider these potential risks when selecting treatment modalities for psoriasis.
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Psoríase , Tuberculose , Humanos , Estudos de Coortes , Fototerapia , Psoríase/complicações , Psoríase/tratamento farmacológico , Psoríase/epidemiologia , Tuberculose/epidemiologia , República da Coreia/epidemiologiaRESUMO
BACKGROUND: Psoriasis has a devastating psychological impact on patients' quality of life. However, the relationship between suicidality and psoriasis remains unclear. OBJECTIVE: This study analysed and compared the risk of suicidality (suicidal ideation, suicide attempt and completed suicide) between patients with psoriasis and the general population. METHODS: This nationwide, population-based, retrospective, cohort study analysed the Korean National Health Insurance Service claim data from 2005 to 2018. RESULTS: The study included 348,439 patients with psoriasis aged over 18 years and with age- and sex-matched controls. The risk of suicidality was higher in the psoriasis group than in the control group [adjusted hazard ratio (aHR) 1.21; 95% confidence interval (CI), 1.18-1.24]. The aHR of suicidality was higher in the psoriatic arthritis group (aHR, 1.46; 95% CI, 1.39-1.54) than in the psoriasis-alone group (aHR, 1.17; 95% CI, 1.13-1.20). However, the severity of psoriasis and suicidality showed no correlation (mild psoriasis group: aHR, 1.22; 95% CI, 1.18-1.25; moderate-to-severe psoriasis group: aHR, 1.16; 95% CI, 1.10-1.23). CONCLUSION: Patients with psoriasis have an increased risk of suicidality. In particular, the presence of arthritis in patients had a more significant effect on the risk of suicidality.
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Psoríase , Suicídio , Humanos , Adulto , Pessoa de Meia-Idade , Ideação Suicida , Estudos de Coortes , Estudos Retrospectivos , Qualidade de Vida , Psoríase/complicações , Psoríase/epidemiologia , Psoríase/psicologia , República da Coreia/epidemiologia , Fatores de Risco , IncidênciaRESUMO
Intrinsic immunologic disparity of psoriasis itself, along with chronic inflammation and immunomodulatory anti-psoriatic treatments could be associated with increased risk of malignancy. We aimed to estimate the risk of malignancy in patients with psoriasis by treatment modality compared with that in individuals without psoriasis in Korea. We conducted a nationwide cohort study using the claims database of the National Health Insurance Service from January 2005 to December 2018. A total of 255,471 patients with psoriasis, and age- and sex-matched non-psoriasis participants (1:1 ratio) were enrolled. The adjusted hazard ratios (aHRs) [95% confidence intervals (CIs)] for malignancy without nonmelanoma skin cancer (NMSC) were 1.10 [1.08-1.12] in patients with psoriasis, 1.13 [1.00-1.27], 1.05 [0.97-1.13], and 1.24 [0.84-1.83] in phototherapy, non-biologic systemics, and biologics cohort, respectively. Among the non-biologic systemics cohort, patients treated with cyclosporin showed higher risk of malignancy without NMSC (aHR [95% CI], 1.20 [1.04-1.39]). The risk of malignancy without NMSC in patients with psoriasis was higher than that in individuals without psoriasis. Phototherapy and biologics were not associated with significant increase of risk; however, cyclosporin appeared to increase its risk. Dermatologists should be vigilant about this potential risk while managing patients with psoriasis.
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Psoríase , Neoplasias Cutâneas , Humanos , Estudos de Coortes , Psoríase/complicações , Psoríase/tratamento farmacológico , Psoríase/epidemiologia , Ciclosporina , República da Coreia/epidemiologiaRESUMO
BACKGROUND: Fibromyalgia is accompanied by symptoms of fatigue, depression, sleep disorders, and physical and mental stress [1]. It is a difficult-to-treat disorder because its exact causes are unknown. OBJECTIVE: This study aimed to examine the effect of progressive muscle relaxation therapy (PMRT) on pain, fatigue, and stress in patients with fibromyalgia syndrome. METHODS: Thirty-seven patients with fibromyalgia syndrome (age: 20-65 years) were randomly allocated to the PMRT group (n1= 18, 2 men and 16 women) or non-PMRT group (n2= 19, 2 men and 17 women). The PMRT group received PMRT twice a week for 8 weeks and the non-PMRT group received conventional physical therapies such as electro-stimulation and heat therapies during this period. The outcome was evaluated before and after 8 week sofintervention using the Visual Analogue Scale, Multidimensional Assessment of Fatigue, Perceived Stress Scale, and measurement of the blood pressure and pulse rate. RESULTS: Pain and fatigue significantly decreased in the PMRT group compared with the non-PMRT group (both P< 0.001). In addition, perceived stress (P< 0.001), systolic blood pressure (P< 0.001), diastolic blood pressure (P< 0.05), and pulse rate (P< 0.001) significantly decreased in the PMRT group compared with the non-PMRT group. CONCLUSIONS: The findings indicate that progressive muscle relaxation therapy is a viable rehabilitative therapy for pain, fatigue, and stress symptoms in patients with fibromyalgia syndrome.
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Fibromialgia , Adulto , Idoso , Treinamento Autógeno , Terapia por Exercício/métodos , Fadiga/diagnóstico , Fadiga/etiologia , Fadiga/terapia , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Dor/etiologia , Projetos Piloto , Resultado do Tratamento , Adulto JovemRESUMO
BACKGROUND: The cranio-cervical flexion exercise and sub-occipital muscle inhibition technique have been used to improve a forward head posture among neck pain patients with straight leg raise (SLR) limitation. However, little is known about the cranio-vertebral angle (CVA) and cervical spine range of motion (CROM) after applying stretching methods to the hamstring muscle. OBJECTIVE: To compare the immediate effects of static stretching and proprioceptive neuromuscular facilitation stretching on SLR, CVA, and CROM in neck pain patients with hamstring tightness. METHODS: 64 subjects were randomly allocated to the static stretching (n1= 32) or proprioceptive neuromuscular facilitation (n2= 32) stretching group. The SLR test was performed to measure the hamstring muscle's flexibility and tightness between the two groups, with CROM and CVA also being measured. The paired t-test was used to compare all the variables within each group before and after the intervention. The independent t-test was used to compare the two groups before and after the stretching exercise. RESULTS: There were no between-group effects for any outcome variables (P> 0.05). However, all SLR, CVA, and CROM outcome variables were significantly improved within-group (P< 0.05). CONCLUSIONS: There were no between-group effects for any outcome variable; however, SLR, CVA, and CROM significantly improved within-group after the one-session intervention in neck pain patients with hamstring tightness.
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Músculos Isquiossurais , Exercícios de Alongamento Muscular , Vértebras Cervicais , Músculos Isquiossurais/fisiologia , Humanos , Perna (Membro) , Cervicalgia/terapia , Estudos Prospectivos , Amplitude de Movimento Articular/fisiologiaRESUMO
Many of the best-performing perovskite photovoltaic devices make use of 2D/3D interfaces, which improve efficiency and stability - but it remains unclear how the conversion of 3D-to-2D perovskite occurs and how these interfaces are assembled. Here, we use in situ Grazing-Incidence Wide-Angle X-Ray Scattering to resolve 2D/3D interface formation during spin-coating. We observe progressive dimensional reduction from 3D to n = 3 â 2 â 1 when we expose (MAPbBr3)0.05(FAPbI3)0.95 perovskites to vinylbenzylammonium ligand cations. Density functional theory simulations suggest ligands incorporate sequentially into the 3D lattice, driven by phenyl ring stacking, progressively bisecting the 3D perovskite into lower-dimensional fragments to form stable interfaces. Slowing the 2D/3D transformation with higher concentrations of antisolvent yields thinner 2D layers formed conformally onto 3D grains, improving carrier extraction and device efficiency (20% 3D-only, 22% 2D/3D). Controlling this progressive dimensional reduction has potential to further improve the performance of 2D/3D perovskite photovoltaics.
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A new diffraction beamline for materials science has been built at the Canadian Light Source synchrotron. The X-ray source is an in-vacuum wiggler with a 2.5â T peak magnetic field at 5.2â mm gap. The optical configuration includes a toroidal mirror, a single side-bounce Bragg monochromator, and a cylindrical mirror, producing a sub-150â µm vertical × 500â µm horizontal focused beam with a photon energy range of 7-22â keV and a flux of 1012 photons per second at the sample position. Three endstations are currently open to general users, and the techniques available include high-resolution powder diffraction, small molecule crystallography, X-ray reflectivity, in situ rapid thermal annealing, and SAXS/WAXS. The beamline design parameters, calculated and measured performance, and initial experimental results are presented to demonstrate the capabilities for materials science.
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OBJECTIVE: The aims of the study were to investigate the kinetic effects of sit-to-stand training in various foot positions on the coronal plane in patients with strokes and to suggest appropriate exercises. DESIGN: Thirty-six poststroke subjects participated in this study. The subjects performed three sit-to-stand trials in the following foot positions: (a) symmetric foot positioning (symmetric), (b) affected foot placed to the side (asymmetric 1), and (c) and less affected foot placed to the side (asymmetric 2). They were asked to perform sit-to-stand training at a spontaneous velocity and remain standing for 5 secs, whereas the vertical ground reaction force was measured using force platforms. The activation of lower limb muscles was evaluated using surface electromyography, and the peak and mean vertical ground reaction force and weight-bearing symmetry ratio were evaluated using force platforms. RESULTS: Our results showed significant increases in the muscle activation, peak and mean vertical ground reaction force, and weight-bearing symmetry ratio of the lower limbs using the asymmetric 2 strategy (P < 0.05). CONCLUSIONS: Our results suggest that sit-to-stand training with the less affected foot placed to the side by the width of the subject's foot may be the most beneficial in the rehabilitation of patients with hemiparetic stroke.
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Hemiplegia/reabilitação , Posicionamento do Paciente/métodos , Reabilitação do Acidente Vascular Cerebral/métodos , Acidente Vascular Cerebral/fisiopatologia , Eletromiografia , Feminino , Pé/fisiopatologia , Hemiplegia/etiologia , Hemiplegia/fisiopatologia , Humanos , Cinética , Extremidade Inferior/fisiopatologia , Masculino , Pessoa de Meia-Idade , Postura , Acidente Vascular Cerebral/complicações , Suporte de CargaRESUMO
BACKGROUND: Taekkyon, a Korean form of martial arts, has been trained for a long period. However, it is not yet known whether the Taekkyon exercise has better effects on functional mobility or balance in older adults than other types of well-investigated exercise programs such as Tai Chi (TC). OBJECTIVE: This study aimed to compare the effects of TC and Taekkyon exercise programs on the lower-extremity strength, balance, and gait ability of community-dwelling older women as a fall prevention method. METHODS: Community-dwelling older women were randomly allocated into the TC group (n1= 23) and the Taekkyon group (n2= 23). Both groups completed 1 h of either TC or Taekkyon exercises twice weekly for 12 consecutive weeks (24 sessions in total). We measured the Timed Up and Go test (TUG), Functional Reach test (FR), one-leg standing test (OLS), Five Times Sit-to-Stand test (5 × STS), 30 Second Sit-to-Stand test (30 s STS), and spatiotemporal gait parameters (gait velocity, step length, step width, stride time, and cadence) before and after the intervention. RESULTS: Both groups similarly showed statistically significant improvements in balance (TUG, FR, and OLS), lower-extremity strength (5 × STS and 30 s STS), and spatiotemporal gait parameters except for step width (P< 0.05). Moreover, the TC group showed greater improvement in the OLS test than the Taekkyon group (P< 0.05). CONCLUSIONS: The results from this study support the efficacy of the TC and Taekkyon exercise programs at improving mobility in this population of older women. However, this study did not clarify which exercise program is more effective as general balance and mobility training program for older women.
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Terapia por Exercício/métodos , Marcha/fisiologia , Artes Marciais , Equilíbrio Postural/fisiologia , Amplitude de Movimento Articular/fisiologia , Tai Chi Chuan , Acidentes por Quedas/prevenção & controle , Idoso , Idoso de 80 Anos ou mais , Exercício Físico/fisiologia , Feminino , Humanos , Vida Independente , Método Simples-Cego , Estudos de Tempo e MovimentoRESUMO
BACKGROUND: The Republic of Korea has become the most rapidly aging society and is anticipated to enter the post-aged society in 2026. As the population ages, demand for senior-friendly products has gradually increased. Under the demands for these circumstances, usability evaluation aimed to make these products more competitive in terms of quality has been perceived as a critical means. In particular, ergonomically wrong-designed products could prove fatal to elderly people. OBJECTIVE: The purpose of the study is to develop qualitative usability evaluation criteria of communication service robot, one of the senior-friendly products, for elderly people. METHODS: To develop the usability testing criteria of a communication service robot for elderly people. The following was carried out: product selection, selection of target product, development of leading indicators, correction by experts, and preliminary evaluation according to the scenario and development of core indicators. For this, a draft questionnaire was developed for the elderly at around age 60. After small group tests and interviews, the experts modified the initial draft to the usability evaluation criteria of communication service robot for elderly people. RESULTS: Development indicators include four subscales: safety, controllability, efficiency, and satisfaction. All the subscales passed the reliability criteria by four groups of elderly people, divided by gender and the familiarity witth smart move devices. CONCLUSIONS: Development indicators cover a wider area of user experiences of the communication service robot and are a good measurement tool to help both the users and developers of the service robot for elderly people.
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Indicadores de Qualidade em Assistência à Saúde , Robótica , Tecnologia Assistiva , Idoso , Idoso de 80 Anos ou mais , Ergonomia , Feminino , Humanos , Masculino , Reprodutibilidade dos Testes , República da Coreia , Inquéritos e QuestionáriosRESUMO
OBJECTIVE: To determine the effect of crossed-education, using task-related training on a tilt table, on upper extremity function and grip strength in subjects with post-stroke hemiplegia. DESIGN: Double-blind, randomized controlled, pilot study. PATIENTS: A total of 45 patients between 6 and 12 months post-stroke. METHODS: Subjects were randomly allocated to the control group, or experimental group I or II. All subjects received conventional upper limb training for 30 min, 3 times a week for 6 weeks, and training on 3 different tilt table applications for 20 min a day. The outcome was evaluated using the Fugl-Meyer scale, Wolf Motor Function Test, and measurements of grip strength using a hydraulic hand dynamometer, prior to and 6 weeks post-intervention. RESULTS: There was a significantly greater increase, post-test, in the Fugl-Meyer scale (p = 0.003), maximal grip strength of the affected hand (p = 0.04), and grip strength, compared with the less-affected hand (p = 0.03), in subjects who underwent supplementary task-oriented training on a tilt table compared with those in the control group. There was also a significantly greater increase in Wolf Motor Function score (p = 0.001), post-test, in subjects who underwent task-oriented training on a tilt table compared with those in the 2 experimental groups. CONCLUSION: Compared with tilt table or conventional training alone, crossed-education using task-oriented training on a tilt table may result in improvements in arm function and maximal grip strength in persons with chronic hemiplegia post-stroke.
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Hemiplegia/etiologia , Reabilitação do Acidente Vascular Cerebral/métodos , Acidente Vascular Cerebral/complicações , Teste da Mesa Inclinada/métodos , Idoso , Método Duplo-Cego , Feminino , Hemiplegia/fisiopatologia , Humanos , Masculino , Pessoa de Meia-Idade , Projetos PilotoRESUMO
BACKGROUND: Cervical spinal instability often leads to neck pain and forward head posture (FHP). To improve neck pain and FHP, both the suboccipital muscle inhibition (SMI) technique and cranio-cervical flexion exercise (CCFE) have been used. However, little is known regarding the validity of hamstring flexibility in neck pain subjects after CCFE as a treatment index, and comparison between the SMI technique and CCFE for neck pain treatment. OBJECTIVE: This study aimed to determine the short-term effects of SMI technique and CCFE, which represent passive and active exercise programs, respectively, and whether these improve the straight leg raise (SLR) test results, popliteal angle (PA), cranio-vertebral angle (CVA), and cervical range of motion (CROM) and are equally effective in immediate enhancement of such measures in neck pain subjects. METHODS: Twenty subjects with neck pain were randomly allocated to the SMI and CCFE groups (n= 10 each). The outcomes were evaluated via clinical evaluation and SLR, PA, CVA, and CROM measurement before and after intervention. RESULTS: SLR test results, PA, CVA (sitting and standing), and CROM (flexion, extension, lateral flexion, and right and left rotations) after both interventions were significantly higher than those before the interventions (P< 0.05). The SLR test results (left), PA, and CVA (standing) after the SMI technique improved to levels similar to those observed after CCFE. CONCLUSIONS: Both the SMI technique and CCFE improve SLR test results, PA, CVA, and CROM and are equally effective in immediate enhancement of the hamstring flexibility, CVA, and CROM in subjects with neck pain.
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Terapia por Exercício/métodos , Manipulação da Coluna/métodos , Cervicalgia/terapia , Adulto , Vértebras Cervicais/fisiopatologia , Método Duplo-Cego , Feminino , Músculos Isquiossurais/fisiologia , Humanos , Masculino , Músculos do Pescoço/fisiopatologia , Cervicalgia/fisiopatologia , Amplitude de Movimento Articular/fisiologiaRESUMO
The aim of this study was to investigate the comparison between a Ki-hap, defined as a psyching-up technique, and verbal encouragement, defined as a verbal command by a third party, on abdominal muscle activation during performance of the crunch exercise in healthy participants. Ninety participants were randomly allocated to the following three groups: crunch only exercise group (CG, n1 = 30), crunch exercise with Ki-hap group (CKG, n2 = 30), and crunch exercise with Ki-hap and verbal encouragement group (CKVG, n3 = 30). The interventions were conducted over three trials with each group, and measurements involving each participant, were performed by a single examiner. The activation of the rectus abdominis (RA), external oblique (EO), and internal oblique (IO) muscles were evaluated using electromyography (EMG) during performance of the crunch exercise by the CG, CKG, and CKVG. Our results showed a significantly greater increase in the EMG patterns of all muscles during performance of the crunch exercise in the CKG (p < 0.05) compared to those in the CG and CKVG. The results also showed that there was a significantly greater increase in the activation of the EO and IO muscles in the CKVG (p < 0.05) compared with that in the CG. These findings demonstrated that the addition of the Ki-hap technique and verbal encouragement, during performance of the crunch exercise, improves activation of the abdominal muscles.
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Músculos Abdominais/fisiologia , Exercício Físico/psicologia , Medicina Tradicional do Leste Asiático/métodos , Medicina Tradicional do Leste Asiático/psicologia , Contração Muscular/fisiologia , Músculos Abdominais Oblíquos/fisiologia , Adulto , Fenômenos Biomecânicos , Eletromiografia , Exercício Físico/fisiologia , Feminino , Humanos , Contração Isométrica/fisiologia , Masculino , Reto do Abdome/fisiologia , Adulto JovemRESUMO
We report a resonant inelastic x-ray scattering study of the magnetic excitation spectrum in a highly insulating Eu_{2}Ir_{2}O_{7} single crystal that exhibits a metal-insulator transition at T_{MI}=111(7) K. A propagating magnon mode with a 20 meV bandwidth and a 28 meV magnon gap is found in the excitation spectrum at 7 K, which is expected in the all-in-all-out magnetically ordered state. This magnetic excitation exhibits substantial softening as the temperature is raised towards T_{MI} and turns into a highly damped excitation in the paramagnetic phase. Remarkably, the softening occurs throughout the whole Brillouin zone including the zone boundary. This observation is inconsistent with the magnon renormalization expected in a local moment system and indicates that the strength of the electron correlation in Eu_{2}Ir_{2}O_{7} is only moderate, so that electron itinerancy should be taken into account in describing its magnetism.
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BACKGROUND: Many studies have shown asymmetric behavior of the surface and deep layers of spine muscles in scoliosis patients, compared to normal individuals. However, there is a lack of research on the transversus abdominal (TA) muscle, which plays an important role in trunk stabilization. OBJECTIVE: To assess symmetry in subjects with adolescent idiopathic scoliosis (AIS) by measuring the thickness of abdominal muscles, and to investigate characteristic features through a comparative analysis of the data with healthy aged-matched group. METHODS: Subjects consisted of 33 AIS and 32 healthy subjects of similar ages between 11-28 years old. We measured TA, internal abdominal oblique (IO), and external abdominal oblique (EO) muscles were measured using ultrasonography imaging. Three repeat measurements of the thickness of each muscle were performed during rest and contraction. RESULTS: For the healthy subjects, the intra-class correlation coefficients (ICCs) for the muscle thickness measures ranged from 0.70 to 0.99, standard error of measurement (SEM) was 0.38 cm, and minimal detectable change (MDC) was 1.07 cm. The ICCs for the muscle thickness measures in the AIS group ranged from 0.90 to 0.98, SEM was 0.45 cm, and MDC was 1.24 cm. The symmetry of the two groups was compared, and showed significant difference only in TA in AIS patient group (P< 0.01). CONCLUSIONS: In conclusion, treatment should be focused on exercises that emphasize symmetry, to induce normal action of the TA and structural changes in the spine because AIS induces asymmetry in TA, which plays an important role in trunk stability.
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Músculos Abdominais/diagnóstico por imagem , Terapia por Exercício/métodos , Contração Muscular/fisiologia , Escoliose/diagnóstico , Ultrassonografia/métodos , Músculos Abdominais/fisiologia , Adolescente , Adulto , Criança , Feminino , Voluntários Saudáveis , Humanos , Masculino , Escoliose/reabilitação , Adulto JovemRESUMO
Monofilaments such as those consisting of polyamide (PA), polydioxanone (PDS), and poly(vinylidene fluoride) (PVDF), have been commonly used in various industries. However, most are non-biodegradable, which is unfavorable for many biomedical applications. Although biodegradable polymers offer significant benefits, they are still limited by their weak mechanical properties, which is an obstacle for use as a biomaterial that requires high strength. To overcome the current limitations of biodegradable monofilaments, a novel solid-state drawing (SSD) process was designed to significantly improve the mechanical properties of both PA and poly(l-lactic acid) (PLLA) monofilaments in this study. Both PA and PLLA monofilaments exhibited more than two-fold increased tensile strength and a highly reduced thickness using SSD. In X-ray diffraction and scanning electron microscopy analyses, it was determined that SSD could not only promote the α-crystal phase, but also smoothen the surface of PLLA monofilaments. To apply SSD-monofilaments with superior properties to cardiovascular stents, a shaped-annealing (SA) process was designed as the follow-up process after SSD. Using this process, three types of vascular stents could be fabricated, composed of SSD-monofilaments: double-helix, single-spring and double-spring shaped stents. The annealing temperature was optimized at 80 °C to minimize the loss of mechanical and physical properties of SSD-monofilaments for secondary processing. All three types of vascular stents were tested according to ISO 25539-2. Consequently, it was confirmed that spring-shaped stents had good recovery rate values and a high compressive modulus. In conclusion, this study showed significantly improved mechanical properties of both tensile and compressive strength simultaneously and extended the potential for biomedical applications of monofilaments.
Assuntos
Materiais Biocompatíveis/química , Nylons/química , Poliésteres/química , Stents , Materiais Biocompatíveis/efeitos adversos , Força Compressiva , Hemólise , Células Endoteliais da Veia Umbilical Humana , Humanos , Teste de Materiais , Nylons/efeitos adversos , Poliésteres/efeitos adversos , Desenho de Prótese , Stents/efeitos adversos , Resistência à TraçãoRESUMO
OBJECTIVES: The purposes of the present study were to compare the effects of backward and lateral walking training and to identify whether additional backward or lateral walking training would be more effective in increasing the walking function of poststroke patients. DESIGN: Fifty-one subjects with hemiplegic stroke were randomly allocated to 3 groups, each containing 17 subjects: the control group, the backward walking training group, and the lateral walking training group. The walking abilities of each group were assessed using a 10-m walk test and the GAITRite system for spatiotemporal gait. RESULTS: The results show that there were significantly greater posttest increases in gait velocity (F = -12.09, P = 0.02) and stride length (F = -11.50, P = 0.02), decreases in the values of the 10-m walk test (F = -7.10, P = 0.03) (P < 0.05) and double-limb support period (F = 40.15, P = 0.000), and improvements in gait asymmetry (F = 13.88, P = 0.002) (P < 0.01) in subjects in the lateral walking training group compared with those in the other 2 groups. CONCLUSIONS: These findings demonstrate that asymmetric gait patterns in poststroke patients could be improved by receiving additional lateral walking training therapy rather than backward walking training. TO CLAIM CME CREDITS: Complete the self-assessment activity and evaluation online at http://www.physiatry.org/JournalCME CME OBJECTIVES: Upon completion of this article, the reader should be able to: (1) understand the potential benefits of backward walking (BW) and lateral walking (LW) training on improving muscle strength and gait; (2) appreciate the potential value of backward and lateral walking gait training in the treatment of hemiplegic stroke patients; and (3) appropriately incorporate backward and lateral walking gait training into the treatment plan of hemiplegic stroke patients. LEVEL: Advanced ACCREDITATION: The Association of Academic Physiatrists is accredited by the Accreditation Council for Continuing Medical Education to provide continuing medical education for physicians.The Association of Academic Physiatrists designates this activity for a maximum of 1.5 AMA PRA Category 1 Credit(s)™. Physicians should only claim credit commensurate with the extent of their participation in the activity.
Assuntos
Terapia por Exercício , Hemiplegia/fisiopatologia , Hemiplegia/reabilitação , Reabilitação do Acidente Vascular Cerebral , Acidente Vascular Cerebral/fisiopatologia , Caminhada/fisiologia , Idoso , Feminino , Hemiplegia/etiologia , Humanos , Masculino , Pessoa de Meia-Idade , Projetos Piloto , Recuperação de Função Fisiológica , Acidente Vascular Cerebral/complicações , Resultado do TratamentoRESUMO
OBJECTIVE: To investigate the effects of respiratory muscle training (RMT) combined with the abdominal drawing-in maneuver (ADIM) on the pulmonary function in patients with chronic spinal cord injury (SCI). METHODS: Thirty-seven subjects with SCI (level of injury: C4-T6, time since injury: 4-5 years) were randomly allocated to three groups; the integrated training group (ITG), the RMT group (RMTG), and the control group (CG). The ITG performed RMT using an incentive respiratory spirometer (IRS) and the ADIM using a stabilizer. The RMTG received only RMT using an IRS. Subjects in the CG received alternative and routine physical therapy or usual care. The interventions were conducted over an eight-week period. Pulmonary function was evaluated using spirometry to measure the forced vital capacity (FVC) and forced expiratory volume in 1 second (FEV1). RESULTS: The differences between the pre- and post-test values for FVC (0.47 ± 0.05 versus 0.15 ± 0.06 versus -0.03 ± 0.01) and FEV1 (0.74 ± 0.07 versus 0.27 ± 0.17 versus 0.02 ± 0.67)were significant among the groups. Post-test, in the ITG, the FVC and FEV1 values showed significant differences from those in the RMTG and CG (F = 11.48 and 11.49, P = 0.002 and 0.001). Furthermore, following the 8-week intervention, the change ratio values of the FVC and FEV1 of the ITG were increased further by an average of 9.75% and 7.91%, respectively, compared with those of the RMTG. CONCLUSION: These findings suggest positive evidence that RMT with additional ADIM training can improve pulmonary function in SCI pulmonary rehabilitation.