introduction: stumbling or falling is a major health problem among the elderly which accounts for their majority of physical injuries such as pelvic fractures, disability, loss of independency and even death. the goal of the study was comparison of the effect of aerobic and resistance exercise on static and dynamic balance in old men. methods: a quasi-experimental study was conducted and thirty...

background: polychlorinated biphenyls (pcbs) are synthetic aromatic compounds containing two benzene rings with one to ten chlorine atoms. there are concerns about the health risks of these compounds in the environment due to their toxicity, persistence, and biological accumulation. pcbs wastes must be treated before being discharged to the environment because they will pollute the water, soil,...

In 'good genes' models of sexual selection, females choose mates whose genes confer increased survival value to offspring. One possible index of male quality is aerobic capacity (the metabolic basis of sustainable exercise), which is likely to be important for fitness. If it is both heritable and ecologically valuable, high aerobic capacity would be a direct signal of male genetic quality. If a...

OBJECTIVE To compare the effect and sustainability of 6 months combined aerobic/strength training vs aerobic training alone on quality of life in women after coronary artery by-pass graft surgery or myocardial infarction. DESIGN Prospective, 2-group, randomized controlled trial. PARTICIPANTS Ninety-two women who were 8-10 weeks post-coronary artery by-pass graft surgery or myocardial infarc...

PURPOSE/OBJECTIVES To test the effects of aerobic and resistance exercise on changes in bone mineral density (BMD) in women newly diagnosed with stage I-III breast cancer receiving chemotherapy. DESIGN Randomized clinical trial. SETTING Two National Cancer Institute-designated cancer centers in metropolitan areas. SAMPLE 66 women with stage I-III breast cancer beginning adjuvant chemother...

Design We aimed to evaluate the effect of progressive resistance training on cardiorespiratory fitness and muscular strength in coronary heart disease, when compared to control or aerobic training, and when combined with aerobic training. Secondary aims were to evaluate the safety and efficacy of progressive resistance training on other physiological and clinical outcomes. Methods and results E...

| This paper investigates the relevance of the immune system metaphor to Time Dependent Optimization (TDO). At rst, we review previous results underlining the over-average reactiveness and robustness featured by a Simple Artiicial Immnune System (Sais) in comparison to well known evolutionist approaches ((GC99]). Then, we evaluate its immunization capability (i.e. improving robustness to previo...

Homeless youth face multiple challenges to becoming independent, self-sufficient adults. They struggle to survive from day to day, doing what they can to secure food and temporary shelter. They endure the trauma of street life, often contending with mental health and sub stance use issues. They lack the education and work experience necessary to find employment. In addition to the issues that c...