ABSTRACT
La prevención de los trastornos alimentarios es considerada por los psicólogos de la salud como una tarea prioritaria a cubrir. De acuerdo con esta idea se propuso analizar y evaluar la eficacia de dos programas de intervención basados en distintas estrategias. La muestra no probabilística estuvo formada por 58 estudiantes, con edad promedio de 13.43, (DE=1.14). Las participantes se asignaron al azar a dos distintos programas de prevención selectiva: Psicoeducación (n=28; x̅ de edad=13.46, DE=1.17) y Realidad Virtual Reforzada (n=30; x̅ de edad=13.40, DE=1.13). Los resultados muestran que no se detectaron diferencias entre los programas. Al evaluar el efecto de los dos programas por separado (prestest-postest) se obtuvieron resultados positivos y estadísticamente significativos (p < .001) en variables asociadas con imagen corporal y conductas alimentarias de riesgo. Además se observó una disminución importante en el porcentaje de participantes que se ubicaban en riesgo (significancia clínica) como producto de los programas. Estos hallazgos son alentadores debido a la importancia implicada en la disminución de factores de riesgo y el efecto que tiene en la salud de las adolescentes.
The prevention of eating disorders is considered, mainly by psychologists of health, a priority task to cover. In accord to this idea it was decided to analyze and evaluate the effectiveness of two intervention programs based in different strategies. The nonrandom sample consisted of n=58 students with a mean age of x̅ =13.43 (SD=1.14), which were randomly assigned to two different selective prevention programs: Psychoeducation (n = 28; age of x̅ =13.46, SD=1.17) and Virtual reality Reinforced (n=30; age of x̅ =13.40, SD=1.13). The results showed no differences between programs. However, when each was evaluated (pretest / postest) results were positive and statistically significant (p < .001) in those variables associated with body image and disordered eating. In addition there was a significant decrease in the percentage of participants who were placed at risk (clinical significance) as a result of the preventive programs. These findings are encouraging because of the importance involved in reducing risk factors and the effect it has on the health of adolescents.
ABSTRACT
The socio-cultural or peer pressure on pre-adolescents and adolescents who desire a perfect body figure can lead to the practice of excessive exercise and/or restrictive diet in order to achieve thinness. So the purpose of this study is to evaluate both factors in a group of Mexican women who practice organized and disciplined physical activity in an institutional framework and Mexican female who don't practice it. The sample consisted on N= 774 women: n=387 practice physical activity and n=387 do not exercise in a disciplined manner. The average age was M=11.8, SD=2.2 with a range between 9 and 16 years old. It was used a scale that measure dietary risk factors and one that measure excessive exercise. Results. An ANOVA generated a model that suggests that women who don't practice organized and disciplined exercise and are more exercise dependence, incur in more restrictive diet. It follows that among the girls who don't practice organized physical activity (exercise) dependence could be reduced to an attitude towards physical exercise combined with restricted diet, for weight control and reducing size. This suggests that physical activity, sports and recreational organized activities organized within an institutional framework promotes eating health.
La presión cultural sobre púberes y adolescentes que desean una figura ideal puede orillarlas a la práctica de ejercicio excesivo y/o dieta restringida con el fin de alcanzar la delgadez. Por ello el propósito del presente trabajo es evaluar ambos factores en un grupo de mujeres mexicanas que practican actividad física organizada y otro que no la practica. La muestra quedó formada por N=774 mujeres: n=387 practican ejercicio y n=387 no lo practican de forma disciplinada. La edad promedio fue M=11.8, DE= 2.2 con un rango de entre 9 y 16 años. Se utilizó una escala que mide factores alimentarios de riesgo y una que mide factores deportivos. Resultados. Un ANOVA generó un modelo que sugiere que las mujeres que no practican actividad física organizada y que son más dependientes al ejercicio incurren más en la dieta restringida. De ello se deduce que entre las chicas que no practican actividad física organizada la dependencia al ejercicio podría reducirse a una actitud hacia el ejercicio físico que además combinan con dieta restringida para controlar el peso y reducir la talla. Esto sugiere que la actividad físico-deportiva-recreativa-organizada dentro de un marco institucional promueve la salud alimentaria.
ABSTRACT
OBJETIVO: Estudar efeitos do ultra-som terapêutico sobre o crescimento do fêmur e da tíbia, em ratos jovens. MÉTODO: Ratus norvegicus com quatro semanas de vida, machos, totalizando 115 animais, divididos em quatro grupos, foram submetidos ao ultra-som terapêutico (0,8 MHz, cabeçote fixo, pulso contínuo, por dez minutos, durante dez dias), na face medial do joelho direito, nas potências de 0,0 W/cm2 (grupo controle), 0,5 W/cm2 (grupo G2), 1,0 W/cm2 (grupo G3), e 1,5 W/cm2 (grupo G4). Lâminas histológicas da epífise, placa de crescimento e metáfise e as medidas dos comprimentos do fêmur e da tíbia foram estudadas na sexta, décima terceira e vigésima sexta semanas de vida. Os dados foram submetidos à análise de variância - fatorial inteiramente aleatorizado. RESULTADO: Nenhuma alteração estatística do crescimento ósseo foi estabelecida entre quaisquer dos três grupos tratados e o grupo controle. Entretanto, alterações sugestivas de diminuição do crescimento do fêmur e da tíbia de G4 em relação a G2 e G3, foram evidenciadas. No grupo G4 alterações histopatológicas como necroses celulares e neoformação óssea, pós-necrose, foram encontradas. CONCLUSÃO: Quando comparados os grupos tratados com o grupo controle, não há evidência estatística de estímulo ou inibição ao crescimento ósseo pela aplicação do ultra-som terapêutico. Nível de Evidência: Nível II, estudo coorte transversal.
OBJECTIVES: To determine the effects of ultrasound therapy on the femur and tibia growth in young rats. METHOD: Four-week-old male Ratus Norvegicus totaling 115 animals, divided into four groups, were submitted to ultrasound therapy (0.8 MHz, fixed tube head, continuous pulse, for 10 minutes, once a day, ten times) on the medial face of the right knee, with powers of 0.0 W/cm2 (group G1), 0.5 W/cm2 (group G2), 1.0 W/cm2 (group G3), and 1.5 W/cm2 (group G4). Histological slides of the epiphysis, growth plate and metaphysis and the femoral and tibial length measurements were studied in the sixth, thirteenth and twenty-sixth weeks of life. The data were submitted to factorial analysis of variance according to a one-way layout. RESULTS: No statistically significant bone growth alteration was established between any of the three treated groups and the control group. However, alterations in femoral and tibial growth suggesting a decrease in G4 in relation to G2 and G3 were noted. In G4, histopathological alterations, such as cellular necrosis and post-necrosis bone neoformation were found. CONCLUSION: According to this study, no statistical evidence of bone growth stimulus or inhibition resulting from the application of ultrasound therapy was found when comparing the treated groups with the control group. Histological alterations regarded as pathological were only observed in G4. Also, smaller significant bone growth was found in G4 compared to G2 and G3. Level of Evidence: Level II, cross-sectional study.