Cardio doesn’t have to mean jogging until your knees complain or spending an hour on a machine you don’t like. For better health, most older adults need a steady amount of movement that gets the heart working, the breathing a little faster, and the body used to showing up again tomorrow. The simple target is this: aim for at least 150 minutes of moderate cardio each week, or about 30 minutes a day, 5 days a week. That may sound like a lot at first. But those minutes can be sp