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.
Freestyle swimming simultaneously works upper-body and lower-body muscle groups. Photo Credit Ryan McVay/Photodisc/Getty Images. Freestyle swimming, also known as the front crawl stroke, involves movements that work muscles throughout your midsection, upper and lower body.Strengthening individual muscle groups can help improve your form and efficiency of the freestyle swimming stoke.. Different muscle groups contribute to particular elements of the freestyle stroke, and you can avoid overuse injuries by strengthening those muscles.trengthening individual muscle groups can help improve your form and efficiency of the freestyle swimming stoke. . Different muscle groups contribute to particular elements of the freestyle stroke, and you can avoid overuse injuries by strengthening those muscles.