Push ups build upper body strength, but to build cardiovascular health one needs to involve as many of the large muscle groups, SIMULTANEOUSLY, as possible. That's why running, Racquetball, cycling and a lot of other exercises are much better for whole body conditioning.
A simple one you you can do at home is push ups!
For elderly people, simple exercises such as light jogging or powerwalking can be good to keep the lungs strong. As far as strength, push-ups can be very effective.
Some exercises that will tone exercises are crunches and yoga exercises. The lung may be a good thing to try. Push ups will help make the area tighter.
sit ups push ups and squats and leg lifts
i would say sit ups, crunches, and push ups are all good exercises to do in your room
push ups and benching
Well you can always just do push-ups or pull-ups bench pressing is always good for your biceps
The best exercises for you to do really depend on what you're looking to get out of it/build on. Push ups aren't much good if cardio is your goal.
Speed walking or light jogging, light push-ups or sit-ups, and other easy light exercises
push ups
The best floor exercises use a lot of different muscle groups. Try situps, jumping jacks, leg raises, and push ups. A good resource for floor exercises is a basic pilates book.
Push ups, pull ups, arm/shoulder exercises