The elaborated approach for researching heart failure is systematic and comprehensive to a large extent. However, it is possible to implement some improvements in order to achieve more precise results. As for the population, which is intended to participate in the research, I am convinced that there is the need to specify the patients who should be examined and monitored. For instance, patients should be divided into two groups. The first one should unite people who are at risk of heart failure. Studies show that men who are older than 65 years old and are diagnosed with diabetes or have obesity are prepossessed to heart failure (Inamdar & Inamdar, 2016). Other risk factors include Afro-American origin and adherence to destructive habits, such as smoking, drinking alcohol, drug abuse, and leading a sedentary lifestyle. The second group should involve people who have no significant prepossession of heart failure. This way, the result of the research may be accurate and comprehensive. Another suggestion on research methods regards challenges of obtaining a sample. It is undeniable that there are considerable hardships with this aspect due to problems with patient cooperation. First of all, it is essential to explain to patients the reasons why they are required to follow particular recommendations with strong arguments. This will ensure the patients to be more accurate with this aspect. In addition, a sufficient solution could be asking patients to lead a diary, where they should record how they stuck to the requirements. This will not only motivate them to adhere to the recommendation deliberately but also supply more accurate results of the research. Moreover, patients will be able to trace the changes in their health state, which will allow them to adjust the treatment plan in accordance with their individual needs. The strategy of focusing on precise age, in which children tend to be diagnosed with type 1 diabetes, may seem advantageous, as it will focus on the specialties of disease development among children. However, division only two age groups, namely from four to six years old and from ten to fourteen, may make the research limited (Couper et al., 2018). Therefore, it may be a beneficial solution to expand age groups. An alternative decision could be implementing the third group, which will unite children, aged from six to ten, who are at minimum risk (Couper et al., 2018). Such an approach will make the research will provide more comprehensive results and will be insightful for further exploration. It is apparent that obtaining a sample may be challenging, especially when the research focuses on children. First of all, there is a range of ethical issues which should be taken into consideration. Therefore, choosing to follow all the requirements of experiments and research strictly has been the most effective decision. It will not involve both physical and mental harm for the young participants and allow them to explore the issue of the research properly. A sufficient solution has been to avoid sensitive themes in questionaries, which will not put pressure on children and maintain a convenient environment for them. In addition, in order to address the problems with obtaining a sample, some of the participants may be monitored in children’s hospital settings (Couper et al., 2018). This approach will allow us to notice any changes in the health state of children and explore them urgently.