Cycling is the best kind of exercise to keep oneself fit.骑自行车是最好的一种工作，以保持自己的合适。 The activity is enjoyable.这项活动是一种享受。 Cycling is enjoyable means that people will stick to his exercise and hence will keep themselves fit.骑自行车是一种享受意味着人民将坚持自己行使，从而将自己保持合适。 Cycling has nothing to do with remaining aloof from people like other exercises want you to.骑自行车无关剩余远离人民像其他演习要你。 Rather you can include your friends or family members too.相反，您可以包括你的朋友或家庭成员过多。 While cycling, you can also explore your neighborhood and if possible whole town or city too.虽然骑自行车，还可以探讨您的居民委员会，如果可能的话整个城市或城市太多。 What can best if you tend to find a new hang out place along with some good fitness?什么最能如果你倾向于找到一个新挂出的地方以及一些良好的健身？ Cycling is best for the people living in the countryside as they get to observe some beautiful and fabulous views.骑自行车是最好的人生活在农村的时候将它们遵守一些美丽和精彩的意见。

Of course, cycling cannot be done indoors so one needs to move out.当然，自行车不能做这样一个室内需要迁出。 This will help people to intake some fresh air hence feeling energized for the rest of the day.这将有助于人们摄取一些新鲜空气，所以感觉充满活力，在余下的一天。 And guess what no petrol is involved in the fitness process.和猜测是没有汽油参与健身的进程。 Start from small distances and then slowly take over long routes.开始由小的距离，然后慢慢地接管长期路线。 This activity has almost no risk involved and minimal chances of getting hurt as the cycle is a light weighed machine.这项活动几乎没有风险和最小的机会受到伤害的周期是体重轻机。 There is no age difference in cycling.不存在年龄差距在自行车。 People of any age can involve themselves in the action for some great sport and a fit body.人民的任何年龄可以参与行动的一些伟大的运动和合适的机构。 Enjoying cycling with the whole family on a Sunday morning seems a great idea.享受骑车的整个家庭在星期天早晨似乎是一个伟大的想法。 Try it out.试试。

It was the German inventor Karl von Drais who developed the first bicycle - the “swift walker” -- in 1817.这是德国发明家卡尔冯德莱斯谁制订了第一个自行车-的“迅速沃克” -在1 8 17年。 This bicycle lacked pedals and people “walked” on them.这自行车缺乏踏板和人民“走”上。 It had a wooden frame supported by two wooden wheels with iron rims and covered by leather.它有木框支持由两个木制车轮轮缘和铁所涵盖的皮革。 Since then the bicycles have come a long way both in terms of frames and materials used to make them.自那时以来，骑自行车走过了漫长的道路无论在范围和使用的材料，使它们。

In the late 1800s, a tubular steel frame replaced the wooden or cast iron frame.在1800年代末期，管状钢架取代了木制或铸铁框架。 Although the steel bicycles were very strong they were also difficult to handle because of their weight.虽然钢铁自行车是非常强大的，他们也难以处理，因为他们的体重。 Even today steel is the preferred material though new age materials like aluminum, titanium and carbon fiber are also being used to make high-end and specialized bicycles.即使在今天钢铁是首选材料尽管新时代的材料像铝，钛和碳纤维也被用来制造高端和专门的自行车。