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 low impact. Unlike jogging or plyometric training, swimming is a way to fit cardio into your workout routine without putting stress on your bones, joints and muscles. This is a plus for swimmers of all ages and body types, but it's particularly beneficial for seniors and people with arthritis.