Resistance bands are a great way to build muscle while limiting injury with heavy weights. Maintaining muscle mass is important for healthy joints as well as keeping your metabolism high. Most resistance bands come with a sampling of exercises to get you started. One reason that resistance bands are helpful is that they provide equal tension throughout the entire range of motion. Check out some bands to get you started:
Another tool to add to your home gym is a jump rope. These are great to have on hand to get your heart rate elevated and get in a good cardio workout. This will also help with building good muscle in the lower extremity. Add this in between sets of your resistance bands workouts and you are in for a great session!