On a daily basis, do some type of easy, low-intensity, steady-state movement. The goal here is not to reach your maximum heart rate or burn a certain number of calories. It’s to move in an easy way, generate some brain food, stimulate your joint receptors, de-stress, etc.
Walking is ideal for this type of regular movement. Humans have walked since, well, since we were humans! We should be able to walk, safely, with good posture, and good balance, throughout our entire lives.
If you can do so while keeping your heart rate in a nice, low, non-stressed range, then easy jogging, cycling, swimming, stand up paddling, kayaking, etc. can be nice, easy, steady-state movements for you, too.
Once or twice each week, add some “bursts” to your cardio-type exercise for “training” purposes. This challenges your body in a different way, more effectively trains your cardiovascular system than old-school cardio, and improves your overall metabolic efficiency, thereby helping you burn excess fat more easily.
Examples here are sprinting, hill running, and bursts of “sprints” while doing just about any other type of cardio exercise – cycling, stand up paddling, rowing, and even on some cardio