Part 1: Answer the question in 350 words and above: What are the cardiovascular changes that take place in the body of a person that was a couch potato and begun to seriously train for a marathon? Part 2: Write a summary (min 150 words for each article) of the following 5 articles: ( No need to read them ALL in 100%, but taking notes of the main points ) https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2723649/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3079864/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5579396/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4868668/ https://www.healthline.com/nutrition/5-studies-on-saturated-fat#TOC_TITLE_HDR_3 Saturated fat does not clog the arteries!!!! (Links to an external site.) The reason has been from confusing CAUSALITY versus CORRELATION in the epidemiological studies on CVAs New model explains controversies over saturated fats and heart disease risk (Links to an external site.) CONCLUSIONS from this PAPER: Overall, the evidence linking SFA intake and ASCVD or mortality largely comes from associative epidemiological studies, as well as extrapolations from the effects of cholesterol-lowering drugs that have been shown to reduce ASCVD incidence and mortality, and not from high-quality RCTs. Also, the mechanisms by which SFA intake increases the cholesterol content of lipoproteins, and the biological purpose of this, are not well documented at the molecular level....From this perspective, the LDL cholesterol−raising effect of dietary SFAs does not imply a pathogenic response, but rather a properly functioning cholesterol homeostasis. Additionally, the different interactions between SFAs and n-3 compared to n-6 fatty acids in the regulation of cell membrane fluidity could explain why combined n-3 and n-6 fatty acid intake may protect against ASCVD, while increased intake of n-6 fatty acids alone does not If verified, our model speaks for a different approach to dietary recommendations for the prevention of ASCVD, and for the discontinuation of simplified expressions such as “good HDL cholesterol” and “bad LDL cholesterol.” types of fats: saturated, trans-unsaturated and cis-unsaturated Definition-for-a-saturated-versus-unsaturated-cis-versus-trans-fat