We've heard it before; now we're reading it in the December issue of IJCP, the International Journal of Clinical Practice: exercise is "the most powerful lifestyle choice any individual can make to improve their health." Science Daily reports on reseach that reviewed the key findings of 40 papers published between 2006 and 2010. The researchers concluded that regular exercise can reduce around two dozen physical and mental health conditions and slow down how quickly the body ages. Find a list of benefits here. What exactly is exercise? The researchers recommend that healthy adults aged between 18 and 65 should aim for 150 minutes of moderate intensity physical activity a week, such as 30 minutes of brisk walking, five days a week. And people who undertake more vigorous intensity exercise, such as jogging, should aim for 20 minutes three days a week.