This systematic review and dose-response meta-analysis for the Global Burden of Disease Study 2013 examined the relationship between total physical activity and the risk of breast cancer, colon cancer, diabetes, ischemic heart disease, and ischemic stroke. The study included 174 articles, with 35 on breast cancer, 19 on colon cancer, 55 on diabetes, 43 on ischemic heart disease, and 26 on ischemic stroke. The analysis used data from multiple sources, including cohort studies and surveys, to map domain-specific physical activity to total activity. The results showed that higher levels of total physical activity were associated with lower risks for all five diseases. However, the most significant risk reductions occurred at lower levels of activity (up to 3000-4000 MET minutes/week). For example, individuals with 600 MET minutes/week of activity had a 2% lower risk of diabetes compared to those with no activity. An increase from 600 to 3600 MET minutes/week reduced the risk by an additional 19%. At higher levels of activity, the risk reductions were much smaller. The study found that the risk reduction for breast cancer was 14% for highly active individuals (≥8000 MET minutes/week) compared to insufficiently active individuals. For colon cancer, the risk reduction was 21%, for diabetes 28%, for ischemic heart disease 25%, and for ischemic stroke 26%. The study highlights the importance of total physical activity across all domains (leisure, occupation, domestic, transportation) and suggests that achieving levels several times higher than the current recommended minimum (600 MET minutes/week) significantly reduces the risk of these diseases. The findings emphasize the need for further research to better quantify the relationship between physical activity levels and disease risk. The study also notes that the current WHO recommendation of 600 MET minutes/week is based on a single domain of activity, and that considering all domains provides a more comprehensive understanding of physical activity's health benefits.This systematic review and dose-response meta-analysis for the Global Burden of Disease Study 2013 examined the relationship between total physical activity and the risk of breast cancer, colon cancer, diabetes, ischemic heart disease, and ischemic stroke. The study included 174 articles, with 35 on breast cancer, 19 on colon cancer, 55 on diabetes, 43 on ischemic heart disease, and 26 on ischemic stroke. The analysis used data from multiple sources, including cohort studies and surveys, to map domain-specific physical activity to total activity. The results showed that higher levels of total physical activity were associated with lower risks for all five diseases. However, the most significant risk reductions occurred at lower levels of activity (up to 3000-4000 MET minutes/week). For example, individuals with 600 MET minutes/week of activity had a 2% lower risk of diabetes compared to those with no activity. An increase from 600 to 3600 MET minutes/week reduced the risk by an additional 19%. At higher levels of activity, the risk reductions were much smaller. The study found that the risk reduction for breast cancer was 14% for highly active individuals (≥8000 MET minutes/week) compared to insufficiently active individuals. For colon cancer, the risk reduction was 21%, for diabetes 28%, for ischemic heart disease 25%, and for ischemic stroke 26%. The study highlights the importance of total physical activity across all domains (leisure, occupation, domestic, transportation) and suggests that achieving levels several times higher than the current recommended minimum (600 MET minutes/week) significantly reduces the risk of these diseases. The findings emphasize the need for further research to better quantify the relationship between physical activity levels and disease risk. The study also notes that the current WHO recommendation of 600 MET minutes/week is based on a single domain of activity, and that considering all domains provides a more comprehensive understanding of physical activity's health benefits.