March 1st, 2010
A bicycle is a human supercharged vehicle that has a frame connected with two wheels and that is
driven by a pedal. introduced during the 19th centuries bicycles are known to outdo the
total number of motor vehicles by a ratio of 2 to 1. In many areas of the globe, bicycles are the main method of transport. Although
the essential use of the bicycle is as a means of transport, it has developed other uses including recreational actions, fitness actions
law enforcement diligences and competitive sports.
The Story of Bicycles
Since the inception of the chain-driven model in around 1885, the fundamental design and the shape of a
typical bicycle has remained relatively unchanged. But, other advances such as using computers to pattern
and check the stability have been made to the bicycle from its inventing process. These methods have greatly aided the spawn of
particularized bicycles for particular purposes such as racing, utility and law enforcement uses. In addition, many of the parts that played a
major role in the development of autos for instance, ball bearings, pneumatic tires and spoke tensioned wheels were initially intended for
the bicycle.
What to Look for In a Bicycle
Dynamics
of the bicycle is something that should be mentioned to first. A bicycle has to maintain its center of gravity over the wheels in order to stay upright or balanced.
Therefore, it accomplishes this by the moving forward using the steering which is ordinarily provided by the rider
and sometimes even by the bicycle itself. Additionally, in order to navigate successfully the body of the rider must balance out the dynamics,
especially at turns. Counter-steering is a task that is used in this regard.
Through both biological and mechanical view points, the bicycle is an super
streamlined machine. Energy needed from the rider for the bicycle to execute its
marvels are high on the list but given the distance that a bicycle can take you through without fuel, it becomes a
worthwhile journey at the end. Nearly, 99% of the energy is expressed to the wheels of the bicycle when a
rider exerts energy into the pedals. However when gears mechanisms are used this figure may drop by 10-15%.A rider using a bicycle
feels air drag or the resistive force that is exerted by air. At higher speeds, importantly greater power outputs are needed to overcome the air drag. When a rider is sitting in an upright position, the
body of the rider accounts for nearly 75% of the total drag experienced by the bicycle and rider combined. Nonetheless, the exerted drag can be significantly
reduced by placing the rider in a supine or a prone position and by covering the bicycle with fairing that is aerodynamic.
The main
features of a bicycle are frame, steering mechanics, seating, drivetrain, suspension, wheels and brakes. Some
bicycles use optional mechanics to get advantage for the dynamics of the bicycle. Using gears a rider can produce a higher power output with a relatively low
power input and thus, crescendo the efficiency of the bicycle.
June 24th, 2008
Stationary Exercise Bikes - Still A Top Choice For Overall Fitness
In all the craze over new fangled fitness equipment, the exercise bike often gets overlooked. Stationary exercise bikes have been around for many years, which can lead some people to think they are outdated or not as effective as newer types of equipment. But for many people, exercise bikes provide a fun, consistent, reasonable means of exercising, improving cardio functions, and losing weight.
Stationary exercise bikes provide all the benefits of riding a bicycle. They provide good cardio workouts, have much less impact on knees, hips and other joints than walking or running, and can be used at any time it’s convenient. Most stationary bikes have manual or computerized controls to allow you to adjust resistance and speed. Many also come with heart monitors and cardio workouts already programmed in. There is a huge selection of price and style, and stationary bikes tend to be the most affordable cardio exercise machine.
Plus, with a stationary bike, you don’t have to worry about traffic, dogs, or bad weather. You can exercise in the convenience of your own home and even watch television or read a book while you bike. Try doing that on the bike path at the park!
Types of Stationary Bikes
Standard, upright stationary bikes come in single or dual action models. Dual action bikes have handles or levers to work the upper body and have been shown to provide more effective cardio workouts, burn more calories, and also improve overall body tone more efficiently than single action bikes. Dual action bikes work well for those with hip or leg injuries who need to exercise but also need to go easy on their legs. The dual action allows the arms to work harder to operate the machine, thus requiring less work from the legs.
A recumbent bicycle, sometimes called a “bent,” is a type of stationary bike that is more laid back…literally. It places the body in a semi or fully reclining position, taking pressure off the back area. Some people feel the position is difficult to adapt to at first, but many who choose recumbent bikes say they are very easy and comfortable to ride. They usually come with a larger seat, which often means you will stay on the machine longer or not have discomfort later.
Because of the reclining position, a recumbent bike works the abdominal muscles more and also creates more hamstring action. The lower center of gravity makes for better balance as well. Doctors feel they are better for those with back problems or with cerebral palsy and related diseases. The recumbent bikes also bring your feet more closely in line with your heart, keeping blood pressure low and providing for a safer overall workout.
Popular Models & Prices
Most stationary bikes come with ways to assess your speed and distance. Economy models have a tachometer/odometer combination and a design that utilizes a flywheel to provide resistance. These models are not programmable and provide the least effective workout, but are at under $200 can be an inexpensive way for a beginner or someone on a tight budget to get some exercise. They can be purchased at many department stores.
Standard models usually come with more features such as a programmable consul that calculates heart rate or allows you to pick a heart rate and then adjust the resistance accordingly. These bikes may use flywheels, fan blades, or magnetic resistance, depending on the quality. Magnetic resistance is usually the best method as it operates more smoothly and is quieter. These models can range from $200 up to $1500 and provide the broadest range of selection for the average person. Some popular models include Tunturi F520 (recumbent), Vision Fitness R2000, and several models from Schwinn, the popular bike manufacturer.
More expensive stationary bikes often use magnetic resistance and typically need to be plugged in to an outlet. They come with all the bells and whistles, including extended warranties, more varied programming features, and comfort options such as built in fans. They typically cost over $1500. Lifecycle 5500HR and 5500RHR (recumbent) are popular choices among those who are serious about their workout or have a healthy budget.
Other popular manufacturers of exercise bikes include Nordic Track, Reebok, Weslo, Keys, Fitness Quest, and Edge.
Compared To Other Equipment
All types of stationary bikes provide a low impact workout that many feel is an advantage over treadmill exercise. The force on the knees, ankles, feet and other body parts that occurs with walking or running can cause swelling or discomfort in the joints. It can irritate old injuries or sometimes even produce new problems. A stationary bike provides non-weight bearing exercise that reduces impact on these areas.
In the health and fitness industries, and among customers, there is an extensive debate over which machines burn more calories and give a better cardio workout. There is evidence on both sides of the issue, but many people agree that a stationary bike should have dual action to optimize weight loss and heart health. The pumping of the arms has a significant impact of the effectiveness of any workout, and a treadmill is less effective as well if you hold onto the hand supports rather than letting your arms swing or pumping them in rhythm to your motion.
Elliptical trainers are another exercise option that provides a low impact workout, but many feel they do not provide the same cardio benefits. Rowing machines are boring, more difficult to use, and can be hard on the back. Other equipment has disadvantages as well, making stationary bikes a good choice for overall effectiveness and satisfaction. Consumer buying shows that exercise bikes continue to rank as a top choice for exercise and fitness training.
In the ever expanding world of health and fitness equipment, there have been some true advances as well as a bunch of gimmicks. A stationary bike is an old standard that has been a proven exercise tool for years, and that continues to improve and adapt through new technology. The overall effectiveness, ease of use and variety of designs and prices makes a stationary exercise bike an excellent choice for beginners and advanced enthusiasts alike.
About the Author:
C.J. Gustafson is a successful writer for Best-Home-Gyms.com, providing consumer
information on the best discount home gyms. Read our
elliptical
trainer reviews, exercise bike and
treadmill reviews
for great ideas on equipping your gym.
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