HEALTH AND SOCIO-ECONOMIC INEQUALITIES IN THE EUROPEAN UNION

The aim of this paper is to analyse socio-economic inequalities in the European Union and their influence on health care. The empirical analysis is based mainly on data from the European Community Household Panel which contains data homogeneous across European Union countries and make comparisons possible. In addition, the functional form of the relationship between income and health, considering the impact of socioeconomic status among individuals whose medical needs are similar, is studied.

SOCIO-ECONOMIC STATUS AND HEALTH: EVIDENCE FROM THE ECHP

In this paper, the effects of socioeconomic characteristics (gender, age, education level, marital status, income, occupational and health status, household size and social relationships) on individuals´ health status in Spain from 1994 to 2001 are analysed. The estimations are carried out using ordered probit models and new data from the whole waves of the European Community Household Panel (ECHP) have been used. The results indicate that personal characteristics, education level, income as well as health status and social relationships have strong influence on self-assessed health.

Obesity and socio-economic inequalities in spain: evidence from the ECHP

This paper explores the relationship between obesity, measured by the Body Mass Index (BMI), and socio-demographic characteristics in Spain. Empirical work is based on data from the European Community Household Panel (ECHP). The results obtained through probit models show that factors such as age, education, marital status, health status and some economic data are relevant in explaining whether an individual is obese or not.ECHP.

Irrationality and quasiperiodicity in driven nonlinear systems

We analyse the relationship between irrationality and quasiperiodicity in nonlinear driven systems. To that purpose we consider a nonlinear system whose steady-state response is very sensitive to the periodic or quasiperiodic character of the input signal. In the infinite time limit, an input signal consisting of two incommensurate frequencies will be recognised by the system as quasiperiodic. We show that this is in general not true in the case of finite interaction times. An irrational ratio of the driving frequencies of the input signal is not sufficient for it to be recognised by the nonlinear system as quasiperiodic, resulting in observations which may differ by several orders of magnitude from the expected quasiperiodic behavior. Thus, the system response depends on the nature of the irrational ratio, as well as the observation time. We derive a condition for the input signal to be identified by the system as quasiperiodic. Such a condition also takes into account the sub-Fourier response of the nonlinear system.Comment: accepted in Phys. Rev. Let

Static loads on the lower back for two modalities of the isometric smith squat

Introduction: The squat is one of the most effective exercises in athletic training. However, there is a scarcity of research that reports the muscular and joint loads in the lumbar region incurred when performing the high bar and the low bar isometric squat modalities in a Smith machine. Therefore, this study aims to determine the muscle force of the lower back extensors, and the compressive (Rc) and shear (Rs) forces at the lumbosacral joint for the one repetition maximum (1RM) high bar and low bar isometric parallel-depth Smith squats. Methods: Eight healthy male well-trained 400-m sprinters participated in the study. The athletes performed the two modalities of the isometric squat on a 7° backward-inclined Smith machine using a mean ± SD 1RM external resistance of 100.3 ± 7.2 kg. During the squat, the participants paused for 2-3 s at the bottom of the squat, corresponding to a position in which the thighs are parallel to the ground. This was, therefore, considered a static position for the calculation of isometric muscle forces and joint loads using static mechanical analysis. Moment arms, and joint and segmental angles were calculated from video images of the squatting performance. Internal forces were computed using a geometrical model of the trunk and lower limb. Results: Spinal extensor muscular forces and lumbo-sacral joint forces were higher when using the low bar technique; with the exception of Rs which was approximately equal. The mean Rc were 10.2 body weights (BW) or 8,014 N (high bar) and 11.1 BW or 8,729 N (low bar). Discussion: The low bar technique yields higher Rc and may therefore be avoided in the rehabilitation of spinal injuries. Increased bone mineral density and well-developed trunk musculature due to long term squat training can provide protection against passive spinal tissue failure. Therefore, the Rc found for the 1RM isometric parallel-depth Smith squat do not appear excessive for healthy well-trained athletes. The presence of Rs at the lumbo-sacral joint in both squat modalities suggests potential for damage to the intervertebral disc. The findings provide an in-depth understanding of the two squat modalities in isometric conditions for the prevention of lower back injury and the design of rehabilitation programs

Static loads on the knee and ankle for two modalities of the isometric smith squat

Introduction: The back squat is a popular strength training exercise that recruits approximately 75% of the muscular system. However, knowledge of muscular and joint loads incurred when performing two variations of the back squat, namely the high bar and the low bar isometric parallel-depth Smith squat, is limited. Therefore this study aims to determine the lower limb muscle forces and the compressive and shear joint forces at the knee and ankle incurred in these two subtle variations of the one repetition maximum (1RM) isometric Smith squat. Method: Eight healthy male 400-m sprinters participated in the study. The participants performed the two modalities of the squat using a 7° backward-inclined Smith machine. The bottom of the squat corresponded to a position in which the thighs are parallel to the ground. The mean ± SD 1RM external load for the eight participants was 100.3 ± 7.2 kg. During the squat, the participants paused for 2-3 s at the bottom of the squat. This was, therefore, considered a static position for the calculation of isometric muscle forces and joint loads using static mechanical analysis. Moment arms, and joint and segmental angles were calculated from video images of the squat obtained at 25 Hz. Internal forces were computed using a geometrical model of the lower limb. Results: Quadriceps muscle and knee joint forces were higher in the high bar squat; where, the mean patellofemoral joint reaction force was 3.7 body weights (BW). The ankle extensor muscle and ankle joint forces were larger in the low bar squat; whereby, the mean compressive force at the ankle joint was 3.0 BW. Discussion: The high bar squatting modality may be avoided in the rehabilitation of ACL injury. Conversely, the low bar technique may be discouraged in conditions of ankle joint instability, strained Achilles tendon, and damaged gastrocnemius and soleus muscles. The findings of the static biomechanical evaluation provide an in-depth understanding of the musculoskeletal loads associated with the two squat modalities in isometric conditions and offer a foundation for the dynamic modelling of the high bar and low bar Smith squat. Further, the knowledge gained can be used for the prevention of injury in strength training and in the design of rehabilitation programs that control muscle recruitment and joint loads

Trends in income inequality in the European Union: implications for health inequalities

The comparative analysis of income inequality across countries has acquired increasing importance in recent years. This paper is divided in two parts. The first one is focused on the analysis of income inequality in the European Union. To carry out this task, we use different models based on Lorenz curves and quantiles functions and different equivalence scales. The European Community Household Panel Data are used. The second part of the paper is focused on explaining the differences in income and health inequalities across European countries. In particular several hypotheses concerning the economic determinants of health inequalities are studied. KEY WORDS Income inequality, Lorenz curves, quantile functions, equivalence scales, European Community Household Panel, health inequalities