with the rapid development of the contemporary society, an increasing number of people, under so much pressure at work, have been deeply depressed in recent years. some of them suggest that it is more enjoyable to have a job, and they work only three days a week with long hours rather than work five days a week with shorter hours now. in their expected situation, they can have a longer weekend to have a rest and be more active in the work next week. but as far as i am concerned, there is no doubt that working for five days with shorter hours can help people do better at work and rest better in weekends.people will feel much more tired if they put the work needed five days to be done in only three days. think about that, now we work 8 hours per day and have a rest for 2 days. if it changed to work three days with the same workload, we need to work more than 13 hours per day. scientists say that each person need 8 hours for sleeping per day, besides, considering the crowded traffic in China, we much spare at least 2 hours on the bus or subway for going to work and back home. so, there is only one hour for us to eat or relax. how could we bare such work pressure in successive three days? that will do great harm to our health. what is worse, for a majority of people, they would miss the meal for more sleep. such long time of hunger could cause stomachache or even cancer. it is not worthy to do so for the longer rest in charge of your lifespan.furthermore, some kind of jobs are not suitable to lengthen the daily work like sports players and programmers. if the coach let his players train all the day and then send them to the race course. it is certain that they will lose. athletes need rest more than us ordinary people after they have trained normally. if you lengthen their training time, their muscles cannot have enough rest, then the athletes will not be strong enough to enable them to have a competition or take part in the next training. programmers, however, is another good example, like me myself, each time i finished a grogram with all night working, all i want to do is sleep. i will not eat anything even though i was considerably hungry. but after an all day sleeping, i started eating, much more than i ever eat in my daily life. that is unhealthy, but i can't control. so don't put yourself much stress at work, it does no good to you.since weekend could let people relax their minds, and most of them say they will have a greater efficiency after a long rest so a longer weekend may be better for people to relax than the shorter one now. but i can't agree with it. yes, people can travel around and meet friends or just rest at home in weekend, it is good for our health. a longer weekend could offer people enough time to travel a distant place to experience different culture and see different people. apparently it is good for us. but don't you think that if we have more time to have a rest in life, about four days, it is hard for us to return back to work the next Monday? at least i am the one who come come to study right away after a long vacation.however, some jobs need a free schedule to do, like playwriters and novelists. as long as they come up with an idea or a plot that is related to their works, they can write almost all day to finish it. no one can disrupt them. but even though it comes to them, it is still have the physical problems, so i strongly hold my opinion that we should not put the work needed fives days to do in three days.