This article develops a novel global strategy to prevent and manage cancer and obesity and other major modern diseases by optimizing circadian timing and regularity of physical activity. Early morning and early evening are considered beneficial in optimizing endocrinology and metabolism. This optimization, particularly in early evening or late afternoon, has the great potential to minimize risks of obesity, diabetes and related cardiometabolic concerns. Bioprocessing & Biotechniques Jo urnal of B io p ro ces sing & B io te ch niques