No matter how old you are, or what your age may be, or even your fitness level, these five activities can help you get in shape and lower your risk for disease:

Swimming. You might call swimming the perfect workout. The buoyancy of the water supports your body and takes the strain off painful joints so you can move them more fluidly. “Swimming is good for individuals with arthritis because it’s less weight-bearing,” explains Dr. I-Min Lee, professor of medicine at Harvard Medical School. Research finds that swimming can improve your mental state and put you in a better mood. Water aerobics is another option. These classes help you burn calories and tone up.

Tai Chi. Tai chi — a Chinese martial art that incorporates movement and relaxation — is good for both body and mind. In fact, it’s been called “meditation in motion.” Tai chi is made up of a series of graceful movements, one transitioning smoothly into the next. Because the classes are offered at various levels, tai chi is accessible, and valuable, for people of all ages and fitness levels. It’s particularly good for older people because balance is an important component of fitness, and balance is something we lose as we get older. Take a class to help you get started and learn the proper form. You can find tai chi programs at your local YMCA, health club, community center, or senior center.

Strength training. If you believe that strength training is a macho, brawny activity, think again. Lifting light weights won’t bulk up your muscles, but it will keep them strong. If you don’t use muscles, they will lose their strength over time. Muscle also helps burn calories. The more muscle you have, the more calories you burn, so it’s easier to maintain your weight. Strength training might also help preserve your ability to remember. Before starting a weight training program, be sure to learn the proper form. Start light with just one or two pounds. You should be able to lift the weights 10 times with ease. After a couple of weeks, increase that by a pound or two. If you can easily lift the weights through the entire range of motion more than 12 times, move up to slightly heavier weight.

Walking. Walking is simple, yet powerful. It can help you stay trim, improve cholesterol levels, strengthen bones, keep blood pressure in check, lift your mood, and lower your risk for a number of diseases (diabetes and heart disease, for example). A number of studies have shown that walking and other physical activities can improve memory and resist age-related memory loss. All you need is a well-fitting and supportive pair of shoes. Start with walking for about 10-15 minutes at a time. Over time you can start to walk farther and faster until you’re walking for 30 to 60 minutes on most days of the week.