Your browser doesn't support javascript.
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 438
Filtrar
1.
PLoS One ; 15(2): e0228297, 2020.
Artículo en Inglés | MEDLINE | ID: mdl-32023313

RESUMEN

Prolonged periods of sedentary behavior are linked to cardiometabolic disease independent of exercise and physical activity. This study examined the effects of posture by comparing one day of sitting (14.4 ± 0.3 h) to one day of standing (12.2 ± 0.1 h) on postprandial metabolism the following day. Eighteen subjects (9 men, 9 women; 24 ± 1 y) completed two trials (sit or stand) in a crossover design. The day after prolonged sitting or standing the subjects completed a postprandial high fat/glucose tolerance test, during which blood and expired gas was collected immediately before and hourly for 6 h after the ingestion of the test meal. Indirect calorimetry was used to measure substrate oxidation while plasma samples were analyzed for triglyceride, glucose, and insulin concentrations. Standing resulted in a lower fasting plasma triglyceride concentration (p = 0.021) which was primarily responsible for an 11.3% reduction in total area under the curve (p = 0.022) compared to sitting. However, no difference between trials in incremental area under the curve for plasma triglycerides was detected (p>0.05). There were no differences in substrate oxidation, plasma glucose concentration, or plasma insulin concentration (all p>0.05). These data demonstrate that 12 h of standing compared to 14 h of sitting has a small effect the next day by lowering fasting plasma triglyceride concentration, and this contributed to a 11.3% reduction in postprandial plasma triglyceride total area under the curve (p = 0.022) compared to sitting.


Asunto(s)
Posición de Pie , Triglicéridos/sangre , Adulto , Área Bajo la Curva , Glucemia/análisis , Estudios Cruzados , Femenino , Prueba de Tolerancia a la Glucosa , Humanos , Insulina/sangre , Masculino , Periodo Posprandial , Curva ROC , Sedestación , Adulto Joven
2.
Phys Ther ; 100(3): 447-456, 2020 03 10.
Artículo en Inglés | MEDLINE | ID: mdl-32031221

RESUMEN

BACKGROUND: Cancer-related fatigue is a symptom commonly reported in survivors of breast cancer and is the most variable symptom. Besides questionnaires like PIPER to assess cancer-related fatigue, there is a need to objectively measure fatigue. OBJECTIVE: The aim of this study was to assess the physiological dimension of fatigue based on acceleration during a 30-second maximal sit-to-stand test. DESIGN: This was a cross-sectional study. METHODS: Linear acceleration from a smartphone placed on the sternum was recorded in 70 survivors of breast cancer. Fourth-degree polynomial adjustment from the acceleration signal to the vertical and anterior-posterior axis was calculated. The fatigue temporal cut-off point was detected as a change in the curve slope of the first maximum point of acceleration. RESULTS: Women were aged 51.8 (8.9) years with a body mass index of 25.4 (5.1) Kg/m2. They performed 23.6 (6.57) number of repetitions. The mean fatigue cut-off point from the total sample was 10.2 (3.1) seconds. LIMITATIONS: Further research should employ time-prolonged tests to study acceleration behavior beyond 30 seconds as well as include a physiological criterion that justifies the nonlinear saturation of the acceleration-based criterion. CONCLUSIONS: This study assessed fatigue through a low-cost and easy-to-use methodology during a functional and widely used test such as 30-second maximal sit-to-stand. This would allow clinicians to assess fatigue in a short-effort exercise to individualize exercise prescription dose, measure changes during intervention, and track fatigue objectively throughout survivorship.


Asunto(s)
Aceleración , Neoplasias de la Mama/fisiopatología , Supervivientes de Cáncer , Prueba de Esfuerzo/instrumentación , Fatiga/diagnóstico , Teléfono Inteligente/instrumentación , Adulto , Anciano , Neoplasias de la Mama/terapia , Estudios Transversales , Prueba de Esfuerzo/métodos , Prueba de Esfuerzo/estadística & datos numéricos , Fatiga/fisiopatología , Femenino , Humanos , Persona de Mediana Edad , Fenómenos Físicos , Sedestación , Posición de Pie , Factores de Tiempo
3.
Phys Ther ; 100(3): 438-446, 2020 03 10.
Artículo en Inglés | MEDLINE | ID: mdl-32043129

RESUMEN

BACKGROUND: Survivors of breast cancer commonly report functional limitations, including cancer-related fatigue (CRF) and decreased aerobic capacity. One key gap is addressing the 3 energy systems (aerobic, anaerobic lactic, and alactic), requiring assessment to establish a baseline exercise intensity and duration. OBJECTIVE: This study examined the feasibility of energy system-based assessment, also providing descriptive values for assessment performance in this population. DESIGN: This was a cross-sectional study. METHODS: Seventy-two posttreatment survivors of breast cancer were recruited. Following a baseline musculoskeletal assessment, women attempted 3 energy system assessments: submaximal aerobic (multistage treadmill), anaerobic alactic (30-second sit-to-stand [30-STS]), and anaerobic lactic (adapted burpees). Heart rate (HR) and rating of perceived exertion (RPE) were recorded. Secondary outcomes included body composition, CRF, and upper- and lower-limb functionality. RESULTS: Seventy of 72 participants performed the 30-STS and 30 completed the adapted burpees task. HR and RPE specific to each task were correlated, reflecting increased intensity. Women reported low-moderate levels of CRF scores (3% [2.1]) and moderate-high functionality levels (upper-limb: 65.8% [23.3]; lower-limb: 63.7% [34.7]). LIMITATIONS: All survivors of breast cancer had relatively low levels of CRF and moderate functioning. Additionally, on average, participants were classified as "overweight" based on BMI. CONCLUSION: This study is the first to our knowledge to demonstrate feasibility of energy system assessment in survivors of breast cancer. Using a combination of HR and RPE, as well as baseline assessment of each energy system, clinicians may improve ability to prescribe personalized exercise and give patients greater ability to self-monitor intensity and progress.


Asunto(s)
Umbral Anaerobio/fisiología , Neoplasias de la Mama/fisiopatología , Supervivientes de Cáncer , Ejercicio Físico/fisiología , Rendimiento Físico Funcional , Adulto , Anciano , Composición Corporal , Neoplasias de la Mama/terapia , Estudios Transversales , Prueba de Esfuerzo/métodos , Tolerancia al Ejercicio , Extremidades/fisiopatología , Estudios de Factibilidad , Femenino , Frecuencia Cardíaca , Humanos , Persona de Mediana Edad , Fatiga Muscular/fisiología , Esfuerzo Físico , Sedestación , Posición de Pie
4.
Phys Ther ; 100(3): 416-428, 2020 03 10.
Artículo en Inglés | MEDLINE | ID: mdl-32043132

RESUMEN

BACKGROUND: Individuals with cancer experience loss of function and disability due to disease and cancer-related treatments. Physical fitness and frailty influence treatment plans and may predict cancer outcomes. Outcome measures currently used may not provide sufficiently comprehensive assessment of physical performance. OBJECTIVE: The objectives of this study are to: (1) describe the development of a functional measure, the Bellarmine Norton Assessment Tool (BNAT), for individuals with cancer; and (2) assess the relationship between the BNAT and the Eastern Cooperative Oncology Group (ECOG) Performance Status, a commonly used classification system by oncologists. DESIGN: This was a prospective cohort correlation study. METHODS: The BNAT encompasses 1 self-reported physical activity question and 4 objective tests: 2-Minute Step Test, 30-Second Sit to Stand, Timed Arm Curl, and Timed Up and Go. The BNAT score and its components were compared with ECOG Performance Status scores assigned by oncologists and analyzed for correlation and agreement. RESULTS: A total of 103 male and female individuals (ages 33-87 years) with various cancer diagnoses participated. The mean (SD) ECOG Performance Status score was 0.95 (0.87), range 0 to 3, and the mean BNAT score was 14.9 (4.3), range 5 to 24. Spearman agreement association of BNAT and ECOG Performance Status scores revealed a significant moderate negative relationship (r = -0.568). LIMITATIONS: The BNAT was compared with the ECOG Performance Status, a commonly used but subjective measure. Additionally, a common data set was used for both deriving and evaluating the BNAT performance scale. CONCLUSIONS: There was a moderate negative linear relationship of BNAT to ECOG Performance Status scores across all participants. Utilization of the BNAT may reflect overall physical performance and provide comprehensive and meaningful detail to influence therapeutic decisions.


Asunto(s)
Supervivientes de Cáncer , Neoplasias/fisiopatología , Evaluación de Resultado en la Atención de Salud , Rendimiento Físico Funcional , Índice de Severidad de la Enfermedad , Actividades Cotidianas , Adulto , Anciano , Anciano de 80 o más Años , Brazo/fisiología , Ejercicio Físico , Femenino , Humanos , Locomoción , Masculino , Persona de Mediana Edad , Neoplasias/complicaciones , Estudios Prospectivos , Autoinforme , Sedestación , Posición de Pie , Prueba de Paso/métodos
5.
Medicine (Baltimore) ; 99(8): e18787, 2020 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-32080072

RESUMEN

RATIONALE: Facioscapulohumeral muscular dystrophy (FSHD) is the third most common muscular dystrophy, which is associated with facial, shoulder girdle, and paraspinal muscle atrophy. Most of the patients develop hypokyphosis and hyperlordosis in the course of the disease, to preserve standing posture. Corrective fusion is contraindicated in these patients as the surgery results with loss of compensatory hyperlordosis and leads to loss of trunk balance while standing. Although spinal fusion in neuromuscular scoliosis is a known treatment option, there are no studies in the literature on the spinal fusion of this specific patient group. PATIENT CONCERNS: In this case report we have presented a 66-year-old woman, who was admitted with back and abdominal pain, inability to sit straight, abdominal discomfort, and numbness in the lower extremities after prolonged sitting. DIAGNOSES: The patient developed severe hyperlordosis causing intra-abdominal disorders, radicular symptoms, and sitting discomfort due to FSHD. INTERVENTIONS: The patient underwent T2-S1 fusion and successful fusion was achieved. OUTCOMES: Individualized Neuromuscular Quality of Life Questionnaire (INQoL) was used to assess preoperative and 3 years postoperative functional outcomes. All domains and total score improved at the end of the follow-up period and successful fusion was verified radiologically. LESSONS: This case suggests that spinal fusion may provide functional improvement in carefully selected patient groups. Patient stratification considering spinal disability is required for further studies in this specific indication.


Asunto(s)
Lordosis/cirugía , Distrofia Muscular Facioescapulohumeral/fisiopatología , Fusión Vertebral/métodos , Anciano , Femenino , Humanos , Lordosis/etiología , Atrofia Muscular/etiología , Distrofia Muscular Facioescapulohumeral/complicaciones , Postura , Calidad de Vida , Sedestación , Resultado del Tratamiento
6.
J Oral Rehabil ; 47(5): 577-583, 2020 May.
Artículo en Inglés | MEDLINE | ID: mdl-31926028

RESUMEN

BACKGROUND: The pharyngeal phase is a particularly important clinical factor related to swallowing dysfunctions. Head and neck posture, as well as bolus volume, are important factors affecting the pharyngeal stages of normal swallowing. OBJECTIVE: The aim of our study was to identify the effects of sitting posture and bolus volume on the activation of swallowing-related muscles. MATERIALS AND METHODS: Twenty-four subjects participated in the study. The subjects were positioned in three sitting postures-slump sitting (SS), lumbo-pelvic upright sitting (LUS), and thoracic upright sitting (TUS). While sitting in the chair, the subject was instructed to swallow 10 and 20 mL of water. Surface electromyography (EMG) was used to measure the muscle activity of the supra-hyoid (SH) and infra-hyoid (IH) muscles. Also, sitting posture alignment (head, cervical and shoulder angle) was also performed. Data were analysed with a repeated measures analysis of variance (RMANOVA) using a generalised linear model. RESULTS: There was no significant difference in terms of the head angle (P = .395). However, significant differences were found in relation to the cervical angle (P < .001) and shoulder angle (P < .001). The TUS produced the lowest SH EMG activity (P = .001), in comparison to SS and LUS. The bolus volume for 20 mL showed greater SH and IH EMG activity (P < .001) than did the bolus volume for 10 mL. CONCLUSIONS: Correcting sitting posture from SS to TUS may better assist swallowing-related muscles with less effort, irrespective of the bolus volume.


Asunto(s)
Deglución , Sedestación , Electromiografía , Músculos del Cuello , Postura
7.
Cancer Sci ; 111(3): 974-984, 2020 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-31925977

RESUMEN

Although occupational sitting time has been associated with adverse health outcomes and mortality, the association with cancer incidence remains unknown. This study investigated the association between occupational sitting time and risk of total and site-specific cancer in a Japanese population. We evaluated 33 307 participants aged 50-79 years who responded to a questionnaire in 2000-2003 in the Japan Public Health Center-based Prospective Study and were followed until 2013. Participants were grouped by sitting time at work. Hazard ratio (HR) and 95% confidence interval (CI) of cancer incidence were calculated with adjustment for potential confounders including moderate-to-vigorous physical activity. During 10.2 years of follow-up, 3807 newly diagnosed cases of cancer were identified. Occupational sitting time was marginally associated with total cancer, with multivariable HRs for the ≥7 h/d vs 1 to <3 h/d category of 1.12 (95% CI, 0.99-1.26; P for trend = .071) in men, but not women. Among findings for cancers at specific sites, long occupational sitting time was associated with increased risk of pancreas cancer, with multivariable HRs for the ≥7 h/d vs 1 to <3 h/d category of 2.25 (95% CI, 1.17-4.34; P for trend = .021) in men, and lung cancer, with multivariable HRs for the ≥7 h/d vs 1 to <3 h/d category of 2.80 (95% CI, 1.33-5.90; P for trend = .013) in women. Extended sitting time at work was associated with an increased risk of pancreas cancer in men and lung cancer in women.


Asunto(s)
Neoplasias/epidemiología , Anciano , Ejercicio Físico/fisiología , Femenino , Humanos , Incidencia , Japón/epidemiología , Masculino , Persona de Mediana Edad , Modelos de Riesgos Proporcionales , Estudios Prospectivos , Salud Pública , Factores de Riesgo , Sedestación , Encuestas y Cuestionarios , Factores de Tiempo
8.
BMC Public Health ; 20(1): 70, 2020 Jan 15.
Artículo en Inglés | MEDLINE | ID: mdl-31941471

RESUMEN

BACKGROUND: Sedentary behavior is associated with health risks and academic under-achievement in children. Still, children spend a large part of their waking hours sitting at a desk at school. Recent short-term studies demonstrated the potential of sit-to-stand desks to reduce sitting time in primary education. The program of "A Good Beginning" was conceived to assess the long-term effects of sit-to-stand desks on sitting time in primary education, and to examine how sit-to-stand desks versus regular desks relate to academic performance, and measures of executive functioning, health and wellbeing. The present paper describes the design of this group-randomized trial, which started in 2017 and will be completed in 2019. METHODS: Children of two grade-three groups (age 8-9) following regular primary education in Leiden, The Netherlands, were recruited. A coin toss determined which group is the experimental group; the other group is the control group. All children in the experimental group received sit-to-stand desks. They are invited and motivated to reduce sedentary time at school, however, it is their own choice to sit or stand. Children in the control group use regular desks. Otherwise, both groups receive regular treatment. Outcomes are assessed at baseline (T0) and at five follow-up sessions (T1-T5) alternately in winter and summer seasons over three academic years. Primary outcome measures are academic performance, and the proportion of sitting time at school, measured with a 3D accelerometer. Secondary outcome measures are a number of measures related to executive functioning (e.g., N-back task for working memory), health (e.g., height and weight for BMI), and wellbeing (e.g., KIDSCREEN-52 for Quality of Life). DISCUSSION: A Good Beginning is a two-and-a-half-year research program, which aims to provide a better understanding of the long-term effects of sit-to-stand desks on sedentary time at school and the relation between sitting time reduction and academic performance, executive functioning, health and wellbeing. The findings may serve as useful information for policy making and practical decision making for school and classroom environments. TRIAL REGISTRATION: The program of "A Good Beginning" is registered at the Netherlands Trial Register (NTR, https://www.trialregister.nl), number NL6166, registration date 24 November 2016.


Asunto(s)
Rendimiento Académico , Ergonomía , Postura/fisiología , Instituciones Académicas , Niño , Femenino , Humanos , Masculino , Estudios Prospectivos , Conducta Sedentaria , Sedestación , Factores de Tiempo
9.
J Sports Sci ; 38(3): 351-356, 2020 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-31818191

RESUMEN

This study evaluated the test-retest reliability of a questionnaire assessing five domains of sedentary behaviour, and compared an overall indicator of sitting time with measures obtained by a multi-domain questionnaire, among adults living in Brazil. Data from two different studies carried out in Pelotas, Brazil, were used. Study A: evaluated 7-day reliability of a multi-domain sedentary behaviour questionnaire among 78 adults (≥18 years). Study B was a population-based study (n = 2,871 adults aged 20+ years) where a score of sedentary behaviour based on time spent sitting in five domains was compared with overall sitting time. Lin's Concordance Correlation coefficients (CCC) and Bland-Altman plots were used to assess agreement between measures. The 7-day reliability of multi-domain questionnaire did not show marked differences in the median of minutes spent in each domain (Study A). For the total score, the Lin's CCC was 0.87. When sitting time was measured by a single question, participants reported on average less sedentary time compared to the multiple-domain questionnaire (Study B). There was a slightly greater difference between measures among participants who reported higher sedentary time. Assessing sedentary behaviour in different domains would appear to be preferable to employing a general question on the total time spent sitting per day.


Asunto(s)
Conducta Sedentaria , Autoinforme , Factores de Edad , Brasil , Escolaridad , Humanos , Reproducibilidad de los Resultados , Factores Sexuales , Sedestación , Clase Social , Factores de Tiempo
11.
Scand J Med Sci Sports ; 30(1): 64-73, 2020 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-31544261

RESUMEN

PURPOSE: Compare power output, cadence, and torque in the seated, standing, and forward standing cycling sprint positions. METHODS: On three separated occasions (ie, one for each position), 11 recreational male road cyclists performed a 14 seconds sprint before and directly after a high-intensity lead-up. Power output, cadence, and torque were measured during each sprint. RESULTS: No significant differences in peak and mean power output were observed between the forward standing (1125.5 ± 48.5 W and 896.0 ± 32.7 W, respectively) and either the seated or standing positions (1042.5 ± 46.8 W and 856.5 ± 29.4 W; 1175.4 ± 44.9 W and 927.5 ± 28.9 W, respectively). Power output was higher in the standing, compared with the seated position. No difference was observed in cadence between positions. At the start of the sprint before the lead-up, peak torque was higher in the standing position vs the forward standing position; and peak torque occurred later in the pedal revolution for both the forward standing and standing positions when compared with the seated position. At the start of the sprint after the lead-up, peak torque occurred later in the forward standing position when compared with both the seated and standing position. At the end of the sprint, no difference in torque was found between the forward standing and standing position either before or after the lead-up. CONCLUSION: Sprinting in the forward standing sprint position does not impair power output, cadence, and torque when compared with the seated and standing sprint positions.


Asunto(s)
Ciclismo/fisiología , Sedestación , Posición de Pie , Adulto , Prueba de Esfuerzo , Humanos , Masculino , Persona de Mediana Edad , Fuerza Muscular , Torque
12.
Artículo en Inglés | MEDLINE | ID: mdl-31861545

RESUMEN

Prolonged sitting is related to a sedentary inactive lifestyle and related to obesity and many metabolic problems caused by inactivity. The problem gets more serious for people who spent most of their work time in a seated position like students or office workers. In this study, we provided standing desk and stool to the local public high school and observed the changes in their behavior in terms of physical activity using tri-axial accelerometer before and after intervention. Previously published study using the same dataset under the larger project reported increased physical activity during school hours. In this study, we extracted more diverse features directly from the raw data instead of using data processed by the software that manufacturer provided. Hence, we were able to analyze the same features (sedentary, physically active time) as well as sleep-related variables. Of the interest, sleep is another important feature that can tell us about participants' health conditions. Even if the intervention contributed to updating their behavioral patterns, the result might be nullified in the long run if their sleep pattern was compromised. The quantity and quality of sleep was not changed after the intervention. Therefore, the efficacy of standing desks has been confirmed again.


Asunto(s)
Instituciones Académicas , Sueño , Posición de Pie , Estudiantes/psicología , Acelerometría , Adolescente , Ejercicio Físico , Femenino , Humanos , Masculino , Obesidad , Proyectos Piloto , Postura , Conducta Sedentaria , Sedestación , Programas Informáticos , Lugar de Trabajo
13.
BMC Public Health ; 19(1): 1723, 2019 Dec 23.
Artículo en Inglés | MEDLINE | ID: mdl-31870408

RESUMEN

BACKGROUND: Low levels of physical activity (PA) and prolonged sitting time (ST) increase the risk of non-communicable diseases and mortality, and can be influenced by socio-demographic characteristics. The aim of this study was to use self-report data to characterise socio-demographic patterns of PA and ST in eight Latin American countries. METHODS: Data were obtained from the Latin American Study of Nutrition and Health (ELANS), a household population-based, multi-national, cross-sectional survey (n = 9218, aged 15-65 years), collected from September 2014 to February 2015. Transport and leisure PA and ST were assessed using the International Physical Activity Questionnaire-long version. Overall and country-specific mean and median levels of time spent in transport and leisure PA and ST were compared by sex, age, socioeconomic and education level. RESULTS: Mean levels of transport and leisure PA were 220.3 min/week (ranging from 177.6 min/week in Venezuela to 275.3 min/week in Costa Rica) and 316.4 min/week (ranging from 272.1 min/week in Peru to 401.4 min/week in Ecuador). Transport and leisure PA were higher (p < 0.005) in men than women with mean differences of 58.0 and 34.0 min/week. The mean and median for transport PA were similar across age groups (15-29 years: mean 215.5 and median 120 min/week; 30-59 years: mean 225.0 and median 120 min/week; ≥60 years: mean 212.0 and median 120 min/week). The median time spent in transport and leisure PA between three strata of socioeconomic and education levels were similar. The prevalence of not meeting PA recommendations were 69.9% (95% CI: 68.9-70.8) for transport and 72.8% (95% CI: 72.0-73.7) for leisure. Men, younger people (15-29 years), individuals with higher socioeconomic and education levels spent significantly (p < 0.001) more time sitting than women, older people (30-59 years and ≥ 60 years) and those in the middle and low socioeconomic and education groups, respectively. CONCLUSIONS: Transport and leisure PA and ST range widely by country, sex, and age group in Latin America. Programs for promoting leisure and transport PA and reducing ST in Latin America should consider these differences by age and gender and between countries. TRIAL REGISTRATION: ClinicalTrials.Gov NCT02226627. Retrospectively registered on August 27, 2014.


Asunto(s)
Ejercicio Físico , Sedestación , Adolescente , Adulto , Factores de Edad , Anciano , Estudios Transversales , Femenino , Geografía , Humanos , América Latina , Masculino , Persona de Mediana Edad , Autoinforme , Factores Sexuales , Factores de Tiempo , Adulto Joven
14.
BMC Public Health ; 19(1): 1489, 2019 Nov 08.
Artículo en Inglés | MEDLINE | ID: mdl-31703665

RESUMEN

BACKGROUND: Although the main targets for reducing workplace sedentary behavior have been clarified, only a few studies have examined the association between social-ecological factors and workplace sedentary behavior for effective intervention. The present study aimed to examine the social-ecological factors of workplace sedentary behavior among Japanese sedentary workers. METHODS: Participants were recruited via a cross-sectional mail survey targeting randomly sampled 6000 middle-aged people dwelling in Matsuyama-city and Koto-ku in Japan. Participants answered a questionnaire on social-ecological factors, recorded their work time in a diary, and wore a triaxial accelerometer during waking time for 7 consecutive days. Workplace sedentary behavior was measured using accelerometer and was referred to as the work time in the recorded diary. Full-time workers who had mainly sitting work and valid accelerometer data were included in the analysis. Workplace sedentary variables were sedentary breaks per sedentary hour, sedentary time, and ≥ 30 min bouts of sedentary time. The associations between each sedentary variable and social-ecological factors were explored by conducting three multiple linear regression analyses adjusting for sociodemographic and health-related factors. RESULTS: A total of 227 participants (133 men, mean age 49.9 ± 6.9 years) were included in the analysis. In the overall sample, "typically seeing work colleagues take sedentary breaks" was significantly associated with more sedentary breaks (B [95% confidence interval {CI}=1.40 [0.07 to 2.73]) and shorter ≥30-min bouts of sedentary time (B [95% CI] = -7.08 [-13.75 to -0.40]). "I am motivated to take sedentary breaks" had an unfavorable association with less sedentary breaks (B [95% CI] = -1.36 [-2.61 to -0.12]) and longer sedentary time (B [95% CI] = 4.15 [0.29 to 8.00]). In male workers, "Too stressed to take sedentary breaks" was significantly associated with less sedentary breaks (B [95% CI] = -5.6 [-9.17 to -2.02]). CONCLUSIONS: Seeing work colleagues take sedentary breaks may be important for reducing workplace sedentary behavior. Those who are more sedentary are motivated to take sedentary breaks. Male workers who feel the need to take sedentary breaks at work are more sedentary.


Asunto(s)
Acelerometría/estadística & datos numéricos , Sedestación , Medio Social , Trabajo/estadística & datos numéricos , Lugar de Trabajo/estadística & datos numéricos , Adulto , Estudios Transversales , Femenino , Humanos , Japón , Masculino , Persona de Mediana Edad , Motivación , Conducta Sedentaria , Encuestas y Cuestionarios , Trabajo/fisiología
15.
Int J Sports Med ; 40(13): 871-875, 2019 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-31590189

RESUMEN

High amounts of sitting increase the risk of non-communicable disease and mortality. Treadmill desks make it possible to reduce sitting during the desk-based worker's day. This study investigated the acute effect on postural stability of interrupting prolonged sitting with an accumulated 2-h of light-intensity treadmill desk walking. Twenty-one sedentary adults participated in this randomized acute crossover trial, with two 6.5 h conditions: 1) uninterrupted sitting and 2) interrupted sitting with accumulated 2 h light-intensity treadmill desk walking. Pre- and post-condition, participants performed four postural stability tests on a pressure plate (bipedal and unipedal standing stance, eyes open and eyes closed). Anteroposterior center of pressure amplitude showed a significant condition x time interaction in bipedal eyes closed (F(1,20)=4.62, p=0.046) and unipedal eyes open (F(1,20)=9.42, p=0.006) tests, and mediolateral center of pressure amplitude in bipedal eyes closed (F(1,20)=6.12, p=0.023) and bipedal eyes open (F(1,12)=5.55, p=0.029) tests. In the significant interactions, amplitude increased pre to post condition in the uninterrupted sitting condition. The accumulated 2 h light-intensity treadmill desk walking ameliorated the negative effect of 6.5 h prolonged sitting on postural sway, supporting workplace treadmill desk use.


Asunto(s)
Ergometría/instrumentación , Equilibrio Postural/fisiología , Sedestación , Caminata/fisiología , Lugar de Trabajo , Adulto , Estudios Cruzados , Femenino , Humanos , Diseño Interior y Mobiliario , Masculino , Persona de Mediana Edad , Salud Laboral , Análisis y Desempeño de Tareas
16.
Zhongguo Gu Shang ; 32(9): 802-806, 2019 Sep 25.
Artículo en Chino | MEDLINE | ID: mdl-31615174

RESUMEN

OBJECTIVE: To explore the influence of individual characteristics of patients on the kinematics parameters of sitting lumbar spine manipulation. METHODS: From January 2016 to December 2016, 30 patients with degenerative lumbar spondylolisthesis were treatede, including 18 males and 12 females, aged from 45 to 61(52.33±2.34) years old, with a course of 2 to 72(29.13±3.23) months. Motion capture technique was used to measure the kinematics parameters of the same manipulator in sitting lumbar spine manipulation for 30 patients, including rotation time, maximum speed and maximum acceleration. The parameters of the left and right hands of the operator were different. The effects of individual characteristics on the kinematics parameters of sitting lumbar spine manipulation were analyzed. RESULTS: The kinematic and mechanical parameters of manipulation were as follows:spin time, maximum speed, maximum acceleration, the manipulation done by right or left hand showed the similar parameters(P>0.05). According to multivariate linear regression, there was a significant correlation between the age of the patient and the rotation time of the operator(P<0.01); the height of patient had a significant correlation with the maximum speed and maximum acceleration of the operator(P<0.01). CONCLUSIONS: There is no difference between the manipulation of left and right hand in clinical application. Age and height are important influencing factors of sitting lumbar rotation manipulation.


Asunto(s)
Manipulación Espinal , Sedestación , Fenómenos Biomecánicos , Femenino , Humanos , Vértebras Lumbares , Masculino , Persona de Mediana Edad , Rango del Movimiento Articular
17.
Int J Behav Nutr Phys Act ; 16(1): 85, 2019 10 12.
Artículo en Inglés | MEDLINE | ID: mdl-31606040

RESUMEN

BACKGROUND: Growing evidence suggests that prolonged uninterrupted sitting can be detrimental to health. Much sedentary behaviour research is reliant on self-reports of sitting time, and sitting-reduction interventions often focus on reducing motivation to sit. These approaches assume that people are consciously aware of their sitting time. Drawing on Action Identification Theory, this paper argues that people rarely identify the act of sitting as 'sitting' per se, and instead view it as an incidental component of more meaningful and purposeful typically-seated activities. METHODS: Studies 1 and 2 explored whether people mentioned sitting in written descriptions of actions. Studies 3-5 compared preferences for labelling a typically desk-based activity as 'sitting' versus alternative action identities. Studies 6 and 7 used card-sort tasks to indirectly assess the prioritisation of 'sitting' relative to other action descriptions when identifying similar actions. RESULTS: Participants rarely spontaneously mentioned sitting when describing actions (Studies 1-2), and when assigning action labels to a seated activity, tended to offer descriptions based on higher-order goals and consequences of action, rather than sitting or other procedural elements (Studies 3-5). Participants primarily identified similarities in actions based not on sitting, but on activities performed while seated (e.g. reading; Studies 6-7). CONCLUSION: 'Sitting' is a less accessible cognitive representation of seated activities than are representations based on the purpose and implications of seated action. Findings suggest that self-report measures should focus on time spent in seated activities, rather than attempting to measure sitting time via direct recall. From an intervention perspective, findings speak to the importance of targeting behaviours that entail sitting, and of raising awareness of sitting as a potential precursor to attempting to reduce sitting time.


Asunto(s)
Concienciación , Sedestación , Adulto , Cognición , Femenino , Humanos , Masculino , Conducta Sedentaria , Autoinforme , Factores de Tiempo , Lugar de Trabajo/psicología
18.
Medicine (Baltimore) ; 98(39): e17287, 2019 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-31574848

RESUMEN

Evidence suggests that mental health is associated with multiple factors such as physical activity, sedentary behavior, and physical function in older adults. The present study used latent profile analysis to identify classes of older adults based on their health profile among a representative sample of Korean older adults with hypertension. Differences in mental health between these classes were also examined.Seven hundred and sixty seven participants (mean age = 70.23, SD = 6.08; men 45.6%) were included in the analysis.There were 3 latent classes (class 1: a physically inactive lifestyle with low physical function and body perception; class 2: a physically moderate lifestyle with moderate physical function and low body perception; class 3: a physically active lifestyle with high physical function and body perception). According to class comparisons, older adults in class 3 had significantly lower anxiety/depression levels than classes 1 and 2. Older adults in class 3 had significantly lower stress levels than class 1.It is possible that among older adults, having a positive attitude of one's body shape may also be important for improving anxiety/depression along with having a physically active lifestyle and maintaining physical function.


Asunto(s)
Imagen Corporal/psicología , Fuerza de la Mano , Hipertensión/psicología , Sedestación , Caminata , Anciano , Anciano de 80 o más Años , Ansiedad/psicología , Estudios Transversales , Depresión/psicología , Ejercicio Físico/psicología , Femenino , Humanos , Hipertensión/fisiopatología , Análisis de Clases Latentes , Estilo de Vida , Masculino , Persona de Mediana Edad , Encuestas Nutricionales , Percepción , República de Corea , Estrés Psicológico/psicología
19.
Med Lav ; 110(5): 331-341, 2019 Oct 29.
Artículo en Inglés | MEDLINE | ID: mdl-31659990

RESUMEN

Systematic Reviews have been introduced to improve the synthesis of available evidence and to reduce bias in the conclusions about a body of evidence. Nowadays, Systematic Review is an established method also in the Occupational Safety and Health (OSH) field. It is the Cochrane Work Review Group that facilitates authors to produce Cochrane reviews of intervention topics in this area. A variety of guidelines used Cochrane Work reviews for underpinning their recommendations. Due to the comprehensive search and reproducibility of the methods of a systematic review, it turned out that systematic reviews can be powerful in changing beliefs. For example, studies published in the eighties advocated the use of back schools. Nowadays, we know that the total body of evidence has changed the traditional view that training in lifting techniques could prevent back pain. 'Sitting is the new smoking' is an eye catching nicely alliterating motto, but it is of course highly overstated. The findings of a Cochrane review of the effects of interventions to decrease sitting at work showed that sitting time can be reduced by a bit less than two hours per day by providing sit-stand desks plus education. However, it is unclear if this is sufficient to counter the effects of sitting. A wealth of evidence on OSH interventions has been collected by international collaboration in the Cochrane Work Review Group. This can be extended to systematic reviews of the effects of exposure of workers to assess to which risks of adverse health effects they are exposed.


Asunto(s)
Salud Laboral , Revisiones Sistemáticas como Asunto , Humanos , Reproducibilidad de los Resultados , Sedestación
20.
Sante Publique ; Vol. 31(3): 377-385, 2019.
Artículo en Francés | MEDLINE | ID: mdl-31640325

RESUMEN

OBJECTIVE: The purpose of this research was to evaluate the effects of an intervention on reducing sitting time in a professional setting. METHODS: The intervention consisted of a group presentation on sedentary behavior at work and active work breaks, followed by an individual planning phase. Participants were then invited to use alert software for four weeks. The intervention lasted six weeks; 38 people aged 29 to 59 years participated (80% women). Before and after the intervention, participants wore accelerometers to assess behaviors (sedentary and physical activity at work) and responded to a questionnaire measuring the degree of automaticity for sitting at work and taking active breaks. RESULTS: After the intervention, the time spent in a sitting position during a working day decreased significantly. Specifically, sitting time decreased more among those aged 29 to 43 years; who had decided to take breaks of at least 5 minutes; and had more extended sitting time before the intervention. CONCLUSIONS: This study demonstrated that combining an informational strategy with computer- or mobile-generated alerts reduces sitting time spent in the workplace. This intervention was inexpensive for employees and companies. An interesting perspective could be to compare these effects with those of interventions based on a change in the physical work environment (such as the installation of adjustable desks).


Asunto(s)
Salud Laboral , Sedestación , Lugar de Trabajo , Adulto , Femenino , Humanos , Masculino , Persona de Mediana Edad , Evaluación de Programas y Proyectos de Salud , Conducta Sedentaria , Encuestas y Cuestionarios , Factores de Tiempo
SELECCIÓN DE REFERENCIAS
DETALLE DE LA BÚSQUEDA