There are plenty of different types to keep fit and each one benefits the health in a different way.
1. Walking- good for energy and cardiovascular fitness. It maintains muscle strength in the legs, helps prevent bone loss. Walk has to be brisk to bring any benefit at all. It does not help general flexibility or balance. Good leg muscles are essential for getting the blood back up the legs to the heart so walking must ideally be part of every older person's routine.

2. Swimming - helps develop muscle strength and cardiovascular fitness. It is good for flexibility in the shoulder and helps people who cannot bear their own weight. It has to be brisk to bring real benefit and does nothing for bone density

3. Cycling - helps develop cardiovascular health, lower body strength and power, balance, ankle and foot elasticity. It does not maintain bone density and a stationary exercise bike will not help balance.

4. Keep fit - in a structured class a program can bring all the benefits of all types of exercise but it depends what is enclosed. A mild seated exercise class may be fun but may not be effective. Exercise books and videos can be helpful too but they do not support progression. It is warmly recommended but make sure the tutor is qualified to instruct older people.

5. Yoga - generally believed to maintain flexibility, muscle tone and strength; reduce anxiety; develop body awareness. The latter is important because, as we age, the sensors that tell us where the body parts are becoming less efficient.

Other form of workout:
Tai chi is the slow sequences of movements develop strength, flexibility, body awareness and especially balance. Also reduces nervousness and stress. But it is not very cardiovascular. It is an excellent exercise for older people but add something for cardiovascular health. Balance training is one of the most successful ways to reduce the risk of falling. If one has problems due to illness, can help to get back to normal and overcome feelings of stiffness or unsteadiness.
Other fun activities:
Dance can be beneficial for balance, flexibility, cardiovascular fitness, power, co-ordination and reaction. It must be brisk to improve cardiovascular fitness. Gyms are mainly benefit to strength and cardiovascular system. Sex is exercise too, though it depends what one does and for how long. Energetic sex can hold cardiovascular fitness and muscular flexibility.

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