Serious viral pneumonia is more likely to happen in those with a weakened immune system, such as: Babies who are born too early. Children with heart and lung problems. People who have HIV/AIDS. People receiving chemotherapy for cancer, or other medicines that weaken the immune system.
Lower back pain: How exercise helps. When you're in pain you may feel like resting, but staying active is good for your back. Exercises for lower back pain can strengthen back, stomach and leg muscles. They help support your spine, relieving back pain. Ideally, choose activities that involve endurance,strength and flexibility such as walking, swimming or cycling.
Swimming is also useful in rehabilitation of injured athletes. Patients with rheumatoid arthritis can improve their aerobic capacity by swimming in warm water. Asthmatics should be encouraged to swim, as swimming is the sport that is least likely to precipitate an asthmatic attack, and the fitter they are the fewer attacks they have; swimming improves their breathing.