How much physical activity do you do in a week？ Are you getting enough exercise？（1） 　　   For example， people who exercise regularly are less likely to suffer from many diseases． Regular exercise reduces the risk of early death by 30%． It also improves your sleep quality．

Today， most adults are much less active than in the past because our jobs are far less physical than the work our grandparents used to do．（2） 　　   This lack of regular physical activity means people burn fewer calories than in the past， so we need to do something to consume （消耗）our energy． Experts think adults need to do 2.5 hours of moderate exercise per week．（3） 　　．

Exercise can be expensive， but it doesn't have to be． Team sports such as football can be cheap because all the players share the cost of the field．（4） 　　 It can also be very social．

If you don' t want to spend any money， try one of the following activities． Go for a run． The only equipment you need is a pair of running shoes． If you take the bus， try getting off one stop early and walking the extra distance． Go to the park． （5） 　　   You can play different kinds of games there． This is a great way to involve family members and friends．

In short， there are many easy ways of keeping fit． If we all recognize the value of doing this， we will live longer and be healthier．

A．	Try getting a group of friends or family together．
B．	This could be fast walking or cycling on a flat road．
C．	Regular activity benefits your health in many ways．
D．	You should get more exercise and eat less to keep fit．
E．	Joining a sports club is a cheap way of getting exercise．
F．	Many of us spend seven hours or more just sitting on a chair each day．