These band exercise can effectively complement some forms of aerobic exercise such as walking or jogging. If you would prefer not to increase the amount of time you spend exercising, but currently walk, I would suggest you reduce the time you walk by 10 minutes and use that extra time to do some resistance training.
Feet in split position, pull the band into your ribcage and rotate your shoulders, alternating right arm then left. Eyes stay focused forward and shoulders rotate around your spine.
20 each arm