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 offers a non-impact way to burn a relatively high number of calories in a short amount of time. The number of calories you burn depends on a few factors, but you can get an idea of how many a typical session might burn. The calories that you burn during your swimming sessions will help you reach and maintain a healthy body weight, which in turn may reduce your health risks.