This research report investigates the impact of 30 minutes of daily running on the risk of coronary heart disease (CHD) in men over 45. It begins with an introduction and literature review, exploring the causes of CHD, the benefits of exercise, and existing research on the topic. The report outlines the research design, utilizing a mixed-methods approach with both quantitative (questionnaires) and qualitative (interviews) data collection methods. The investigation plan details the sampling strategy (systematic random sampling of men aged 45-80), data collection methods (questionnaires and semi-structured interviews), and data analysis techniques (SPSS for quantitative data and thematic analysis for qualitative data). Anticipated outcomes include demonstrating the benefits of running for heart health and informing healthcare professionals. The report addresses ethical concerns, such as obtaining prior approval and maintaining confidentiality. Potential risks, including loss of follow-up and incomplete data, are also acknowledged. The proposed method of dissemination includes publication in medical journals, research websites, and presentations at conferences. A detailed timetable with milestones is provided, along with a comprehensive list of references.