The best exercise for your age

The effect of exercise on health is profound. It can protect you from a range of conditions, including heart disease, type 2 diabetes and some cancers. But the type and amount of exercise you should do changes as you age. To ensure that you are doing the right type of exercise for your age, follow this simple guide. Exercise habits tend to steadily decline during teen years, particularly in girls. Getting enough exercise promotes a healthy body image and helps manage stress and anxiety. You can also: Encourage teenagers to keep one team sport, if possible. For teenagers who are not into team sports, swimming or athletics can be a good way to keep fitness levels up. How to increase …

Earth’s magnetic north pole is hurtling toward Russia

(CNN)The north magnetic pole has been drifting so fast that it could be a problem for smartphone maps and navigation systems. The model, which is commissioned by the British and US military agencies, is typically updated every five years, the most recent being in 2015. But the agency explained that the “out-of-cycle update … will ensure safe navigation for military applications, commercial airlines, search and rescue operations, and others operating around the North Pole.” And while the model’s primary user is the military, it has found its way into Google and Apple’s civilian mapping systems. The difference will be minor for civilian purposes, however, and the changes are largely limited to latitudes above 55 degrees. “For most users below 55 …