Be aware the Exercise isn't necessarily what you may think it is. If your sole image of exercise is calisthenics and weight lifting, you are missing the vast majority of exercise options. So what is exercise then? From a physiological standpoint, exercise is any activity that results in physical effort on the part of the body.
So what activities count as exercise? Try the following:
Chasing the bus
Mopping the floor
The list can get quite varied, there are so many things that count as exercise. Still exercise can be grouped into three types depending on the overall effect it has on the human body:
Aerobic exercises such as walking and running focus on increasing cardiovascular endurance.
Anaerobic exercises such as weight training, functional training or sprinting increase short-term muscle strength.
Each type has it value. In selecting the kind of exercise activity to engage in, it is important to choose one that will actually be done. If you find it boring, you will eventually give it up and lose the benefits. Consequently try do something that you will enjoy and keep on doing. Of course if you are the kind the person that is perennially late for the bus, you're probably set for life. :)