It is never too late to be active. If you have lived a sedentary life style for decades, becoming active may prove to be the hardest task you undertake. You Can Start Being Active Today. If you can start small you will be amazed at how your body will reward you for your efforts. We know you can’t walk on water, but if you have access to a swimming pool start by walking back and forth across the shallow end of the pool. You can walk in water without harmful impact on your sedentary joints. In the beginning do this for 3 to 5 minutes at least 3 times a week.