My doctor told me that adding an exercise regimen that kept my heart rate accelerated 30-40 minutes almost every day would be good for me. Doing that (and changing eating habits) helped me lose weight. My question is: is 60 minutes of cardio-exercise ?twice as good? as 30 minutes? Is 45 minutes 50% better for me than 30? Or is there a diminishing return on incremental increases like that?
Organic foods have few, if any, health advantages over conventional foods, a research review finds. The researchers looked at thousands of prior studies. They focused on 237 that met their standards for how well the research was done. Only 17 studies compared how the foods affected people. The others focused on properties of the foods themselves. Nutrient levels varied greatly, with no clear patterns. Organic produce was 30% less likely to have pesticide residue than conventional produce. Children in 2 studies were less likely to have pesticides in urine if they ate organic diets. But researchers said the amounts were small and within safety limits. Bacteria levels were about the same in both kinds of meats. But the bacteria in the conventionally produced meats were more drug-resistant. They were 33% more likely to resist multiple antibiotics.