Cycling can be defined as a sport or an exercise which involves the use of bicycles particularly.骑自行车可以被界定为一种运动或工作，涉及使用自行车特别。 It is a form of exercise where a person uses his legs to stimulate the body metabolism by peddling the wheels.这是一个形式的行使如果一个人使用他的腿，以刺激人体代谢兜售的车轮。 A cycle or rather a bicycle is mechanical equipment which brings ones feet into motion.一个周期或者骑自行车是机械设备带来的英尺的动议。 Cycling is one such activity which acts upon the entire body.骑自行车就是这样的一个活动行为的整个身体。 It initially is applicable as a warming up activity.它最初是作为一个适用变暖的活动。 Further it also an easy and simple method of exercising for all age groups which is because it has very easy mechanism and also it has less risk factors.此外它也容易和简单的方法行使对所有年龄组是因为它很容易机制，也有不足的风险因素。 Hence cycling is recommended for all age groups.因此，骑自行车，建议所有年龄组。

Cycling is all in all a highly beneficial form of sport since it not only regulates body temperature, flow of the blood but also helps to reduce cholestrol levels on large scale, cardiovascular and joint related ailments.骑自行车是所有的都是非常有益的运动形式，因为它不仅调节体温，流动的血液，而且有助于降低胆固醇水平对规模大，心血管病和关节有关的疾病。 Further more cycling is also seen as a knee rehabilitating sport .此外骑自行车也被视为膝伤恢复运动。 those who suffer from ankle or knee problems.这些谁遭受踝关节或膝关节的问题。 Nowadays there so much in the markets that one cannot hold to following a simple diet then there eating out trends in such conditions people tend to put on wait even, office goers, businessmen put on wait and in their busy hectic schedule they get less time to go gymming.如今有这么多的市场，一个不能坚持以下一个简单的饮食然后有吃的趋势在这种条件下人们往往把等待，甚至办公人士，商人把等待，并在其繁忙的日程繁忙，他们得到的时间更少去gymming 。 In such situations they are find it very -very convenient to make of bicycle because it is an easy mode to burn those calories .在这种情况下，他们感到非常，非常方便，使自行车，因为它是一个简单模式，以烧伤这些热量。 It has been observed that even half an hour a day is equivalent to one hour of exercise at gym.据观察，甚至半小时，一天等于一小时的健身运动。

When it comes to buying a bike, one often asks the question, “What kind of a bike should I buy?” The answer depends on what kind of riding you want to do.说到买了自行车，人们往往问的问题， “什么样的自行车我应该买什么？ ”答案取决于什么样的骑马你想做的事。 For serious off-road cycling, you need a sturdy mountain bike; for distance riding you need a fast, light and comfortable bike; for traveling you need a touring bike.对于严重的越野自行车，你需要一个坚固的山地自行车，骑马的距离你需要一个快速，轻型，舒适的自行车;旅游你需要一个旅行自行车。 You can even go in for a companion bike if you have to carry your child to school or spouse to work.你甚至可以去为同伴自行车如果您携带您的孩子上学或配偶工作。

The choice is yours.一切由您选择。 Today, you have specialized bikes for specialized needs.今天，你有专门的自行车专门的需要。 Mountain bikes are usually heavy and have a higher rolling resistance.山地自行车通常是沉重和有较高的滚动阻力。 But they are the best to own if you live in a place with hills all around you.但是，他们是最好的，以自己如果你住在同一个地方山上所有你周围。 They run smoothly along single-tracks, along steep mountain trails and over rocks.他们顺利地沿着单一轨道，沿着陡峭的山间小径和岩石。

The racing bicycle is made using aluminum and dual carbon fiber chain and seat stays.该赛车采用的是铝和碳纤维双链和座位留下来。 It is lightweight with a raised seat to provide dynamic posture to the rider.这是轻量级的提高提供座位的姿态，以动态的骑手。 The front and rear wheels are closely arranged for swift turning.前后车轮有密切安排迅速转折点。 For greater aerodynamic efficiency, the racing wheel has a triangular cross-section that forms a teardrop with the tire.为了提高气动效率，赛车方向盘有一个三角截面的泪滴形式的轮胎。 The number of spokes in the wheel are few -- the reason being the need to reduce wind resistance and to add to overall efficiency.数量辐条的车轮很少-原因是必须减少风的阻力，并增加整体效率。 However, in the case of hill climbing bicycles, the traditional box-sectioned rim is used.然而，在爬山自行车，传统的方块，切片用篮筐。

The rims of the racing bikes are made of aluminum, which is lightweight and can be easily molded.该轮辋的赛车自行车是铝，这是重量轻，可以很容易成型。 However, in some bicycles molded carbon fiber is used to make the rim.然而，在一些自行车成型碳纤维可用于生产篮筐。 These rims are lighter as compared to aluminum rims but they easily crack and chip when the wheel punctures.这些车轮更轻相比，铝轮辋，但他们很容易裂纹和芯片时，车轮穿刺。 That is why the riders prefer cheaper and heavier wheels for training.这就是为什么乘客喜欢更便宜和更重轮培训。

Gears and chain drive have made cycling easier, and more fun.齿轮及链传动取得了自行车更方便，更有趣。 The two literally channel the energy that makes the bicycle move forwards.这两个字面上的能源通道，使自行车向前移动。 However, this was not always so.然而，这并非总是如此。 In the first bicycles the pedals were attached to the wheels, and cycling was not easy.在第一个骑自行车的脚踏板被重视的轮子，自行车是不容易的。 It was only when the chain drive was developed that the bicycle got its modern look.这是只有在链传动是发达国家的自行车有其现代的外观。

The cyclist could move the rear wheel forward by putting pressure on the pedals that were attached to the chain drive.骑单车可移动后轮提出施加压力，踏板被附在链传动。 The greater the pressure, the greater was the pull on the rear wheel.更大的压力，更大的是拉的后轮。 The chain drive also made it possible for the rider to sit between the two wheels and pedal comfortably.在链传动也使得车手坐在之间的两个轮子和踏板轻松。 It also improved the balance of the cyclists.它也改善了平衡，骑自行车。