You may not realize it, but you may have a bad habit. Getting regular exercise is considered a good habit, and therefore if you are not getting regular exercise, that is a bad habit. The good news is that you can break this habit relatively easy.
You don’t have to participate in an extreme exercise to reap the benefits of exercise. You just need to be consistent and do it frequently. But, this does not mean that you should do it every single day. Three to four days of exercise, every week is going to be good enough for most people.
Your best bet is to find a qualified professional, i.e., a personal trainer, to set up a program for you. If you just start doing random exercises, it still may benefit you. However, having a structured plan will give you the most benefits in the shortest amount of time. A good trainer will get to know your body and will tailor a plan around what he or she finds out about you. The trainer should also ask what your fitness goals are. You may be looking to bulk up, or you may want to have more stamina and energy. Your trainer should ask you several questions to determine what you want out of the program.
If you decide to go it alone, i.e., without a trainer, make sure you do a bit of research on how to set up the exercise program for yourself. This option is harder for you because you are probably not qualified as a trainer. Also, you won’t know if you are doing the exercises correctly. An alternative approach is to use a trainer for a few days or weeks, and then as you get used to the exercises, cut the ties with the trainer.
If you do nothing else but increase your walking, this is better than not doing any exercise at all. Therefore, if you continue to walk regularly, you may consider the bad habit broken. Don’t be fooled into thinking that you can walk one day per week and say that you’ve broken the habit though - because that is not enough. As previously stated you need at least three days per week.
You can build up your stamina over time by starting out with small durations and then increase the duration as your body gets used to your routine. Many people get the exercise bug and end up increasing their activity over time.