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.
1 Different swimming strokes challenge different muscles within the body so you can choose where you tone up. 2  The pressure of water causes a shift of blood volume from the periphery of the body to the thorax. 3  This increases venal pressure and so leads to a decrease in heart rate of up to 20bpm lower in water than on land. Swimming can support up to 90% of the bodyâs weight in the water, meaning that those with disabilities, injuries or illnesses such as arthritis can take part in a comfortable and safe environment.