Arm Crank Ergometry Assignment Example | Topics and Well Written Essays - 2000 words

Arm Crank Ergometry - Assignment Example Previous studies have considered issues linked to exercise efficiency. This line of enquiry provides important information associated with the relationship between the energy required to achieve a given amount of external work. In the context of a competitive athlete or a patient in a clinical setting, exercise efficiency provides a useful insight into functional capacity. When presented in either gross or net terms, exercise efficiency has been shown to increase in line with workload during both cycling and ACE. Several studies have also demonstrated there to be a clear interaction between crank rate and workload with respect to oxygen consumption during cycling and ACE. Additionally, previous studies have considered exercise efficiency in a number of different ways, including the calculation of gross, net, and delta values. Powers et al. (1984) showed that VO2 during ACE increased in line with crank rate. At workloads of 15 and 30W, VO2 was lower and exercise efficiency was higher, using crank rate of 50 and 70 rev.min-1 compared to 90 rev.min-1. Furthermore, when the workloads were increased to 45 and 60W, exercise efficiency remained higher using 50 compared to 90 rev.min-1. ... Furthermore Smith et al. showed that while variations in crank rate (50, 70 and 90 rev.min-1) influenced measures of exercise efficiency a relatively low workloads (30 to 70w) during ACE, these discrepancies did not exist at 90w. These data are interesting as they question the previously reported interaction between crank rate, workload and exercise efficiency. The purpose of this practical will be to further investigate 1) if exercise efficiency parameters change in line with variations in crank rate and 2) to determine whether or mechanical efficiency varies according to the external workload being achieved. In these respects, values of gross, net and work efficiency will be considered. RESULTS. The results of the experiment are summarised in the table 1 in the Annex. You can see that the index FE02 (fractional concentration of oxygen in expired air) was varied in the range between 16.2 and 18.5 ml O2/kg/min (range is 2.3 ml O2/kg/min). Consequently the mean of 35 measurements was equal to 17.1 and its standard error is 0.09. The variance of FE02 gross value was 0.34 and standard deviation - 0.56. The distribution of the sample was asymmetric and not normal (skewness is 0.72 and kurtosis 0.29). The values of median, lower and upper quartile were equal to 17.0, 16.7 and 17.4 correspondingly. The mean value of FECO2 (fractional concentration of CO2-exhaled) was equal to 3.660.08 while the variance and standard deviation was 0.24 and 0.49 respectively. The median of the index was 3.73 and the first (lowest) and third (upper) quartiles were equal to 3.45 and 3.98 while the minimum and maximum were 2.52 and 4.44 (range is 1.92 ml CO2/kg/min). The skewness and kurtosis were not equal to zero thus the distribution was not symmetric. The data

Reading and write essay Example | Topics and Well Written Essays - 750 words

Reading and write - Essay Example It is vital to pay attention to this debate in regards for the future existence of the human race. As population keeps rising, the environment size remains constant. This leads to increased pressure on the natural resources found in the environment such as vegetation and minerals (Moseley, Lanegran & Pandit81). This scenario would result to a situation where the resources would become scarce to accommodate population. It is in this respect that it becomes vital to pay attention to this debate. As the population rises so to does the impact of human action on the environment. Human action such as industrial and agricultural revolutions has contributed to key impacts on the environment. Technological advancement has advanced food production as well as depletion of natural resources like minerals, biodiversity, and the global climate. It is vital that human beings think about the results that their actions leave on the environment. Population rise also leads to increase in waste producti on, which impacts on environmental degradation. Greater efforts need to be put in place to understand the relationship between population and environment. There are serious concerns on the results of population increase on local resources like water, soil, forests, pastures, fisheries and biodiversity. As the population keeps rising so to do humans encroach on other habitats (Moseley, Lanegran & Pandit 105). Population growth also results to development, which leads to expansion of human activities such as creation of industries and settlement areas. This development facilitated by population increase also results to encroachment of other habitats. Encroachment as a result of population rise threatens the existence of other animal and plant species. These species get forced to shift their natural habitats, and this may lead to their extinction. To create a balance in nature, there is the need for the existence of other species apart from the human race. The loss of biodiversity in t he environment posses a key threat to human beings. Population increase also contributes to climate change. Population increase may result to economic growth and development. Growth and development get characterized by technological advancement, industrial and agricultural revolutions (Moseley, Lanegran & Pandit 212). The development of industries ensures that carbon emissions impact on the climate by altering weather patterns. Population increase also results to increased pressure on environmental resources such as forests and water catchment areas. Pressure on such resources distorts the global water cycle and in turn results to climate change over time. Focus should get placed on developing sustainability between population and the environment. This concept seeks to address the issue of sustainable development. A balance should be struck between population increase and the environment. The sustainability concept seeks to address issues on population and resources, ecosystems, spe cies, and wastes. Sustainable development between population and the environment requires that focus be placed on policies and ethics by human beings. Policies should get created to protect the environment from negative human impacts. Policy makers such as governments and non governmental organizations need to develop strategies that would ensure synergistic relations between populatio