Image by mikebaird via FlickrExecise is good. It can halve your risk of developing many major illnesses (including type 2 diabetes, coronary heart disease, osteoporosis, cancers - e.g., it protects against bowel cancer; for older women, it may cut breast cancer risk). Benefits of regular exercise include increasing levels of HDL ('good' cholesterol) and reducing high blood pressure. It promotes bone density to protect against osteoporosis, improves sleep, reduces stress and risk of depression and dementia later in life.
Daily Exercise is good for you