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Smoking-Related Lung Disorders

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Irrespective of smoking related lung disorders, findings suggest smoking can impair muscular strength and flexibility, disturb sleep patterns, is associated with osteoporosis, rheumatoid arthritis and lower back pain. Coupled with the deteriorating effects of ageing, there can be severe health implications within the elderly population. However, even so, there has not been enough research into this area. The aim of this critique is to analyse whether researchers have been effective in conducting a study which aims to addresses this.

Introduction
The introduction of the study is clear through its aims and supported with balanced arguments and relevant literature review such as Furnaletto et al and Pitsavo et al. It is important that researchers …show more content…

A significant criticism of this design is that researchers cannot control confounding variables; these are extraneous variables that affect or simultaneously correlate with both independent and dependant variables (Lund Research, 2012). Smoking and its secondary health impairments are not the sole determinants of physical activity, exercise capacity and quality of life, there are multiple confounding factors present; such as levels of stress or health education can impact both levels of smoking and physical activity. Consequently, direct causal or associative relationship can not be drawn between smoking and the dependant variables (Monsen, 2007). Therefore this study lacks internal validity as researchers can prove that only the independent variable is responsible for changes in the dependent variables. Nevertheless, it is argued, although we cannot infer relationships, cross-sectional studies are useful for indicating a possible link between tested variables and thus are useful in generating hypotheses and encouraging further research(Page et al., 1995) There has been a lack of research into the link between smoking status in physically independent elderly individuals and physical activity, exercise capacity and quality of life, therefore it may be argued that, firstly, it is more appropriate ascertain if there is a link between these variables from previous studies before progressing to …show more content…

A limitation of cross sectional studies is that the design is reliant on data which has been collected for other purposes and methods adopted cannot be controlled or changed. Studies analysed in this aimed to find methods of improving physical fitness and counteract inactivity with the use of pedometers and participants were selected via convenience and volunteer sampling (Proença et al, 2012, Zabatiero et al., 2013)).Thus participants who volunteered were most likely to have been physically active, have greater exercise capacity and thus more willing to take part than those who were less physically active. This contradicts this study as researchers are trying to find a full representation of different levels of physical activities and exercise capacity within the elderly population. This is a limitation as it does not provide full representation of elderly population and does not account for those who have been physically fit but less active. As a result, this study lacks internal and external validity as it has poor generalisability and participants are not fully representative of the general elderly

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