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A trainer or "indoor trainer" is a piece of equipment that makes it possible to ride a Bicycle indoors without moving forward. They are primarily used to train for races. A trainer consists of a frame, a clamp to hold the bicycle securely, a roller that presses up against the rear wheel, and a mechanism that provides resistance when the pedals are turned. In a wind trainer, the roller drives fan blades that create air resistance. These are typically the least expensive and noisiest trainers. Magnetic trainers have Magnet s that resist each other, and are moderately expensive and moderately noisy. Some magnetic trainers have handlebar-mounted control boxes to change the level of resistance during a training session. Fluid trainers use liquid-filled chambers to create resistance. They are the most expensive and most quiet trainers. A small number of trainers use a centrifugal pressure mechanism to create resistance, involving pressure plates, ball bearings and specially shaped grooves. These are similar to fluid trainers in price and performance. Trainers make it possible to build bicycle skills and power very efficiently in a highly controlled environment, without the unavoidable interruptions of outdoor riding. For instance, in hill training, instead of being limited to whatever hills are around one's home, one can simulate any size and steepness. One triathlon coach estimates that three hours of indoor training can be as effective as four hours of outdoor training. Trainers provide better preparation for racing than Stationary Bicycle s. Trainers require better technique than stationary bicycles, and they provide a more realistic-feeling ride. The geometry and resulting body position of a stationary bicycle may be significantly different from a racing bike; of course, if one uses the racing bike itself in an indoor trainer, the body position is identical. However, indoor training is extremely monotonous. Some people find the tedium unbearable. Others distract themselves with music, television or videos. Some trainers are equipped with sensors that monitor the rider's performance. Power output, cadence, virtual speed and heart rate are among the metrics that can be transmitted electronically. Analyzing these figures can help to fine-tune the athlete's training. Rollers are a similar device, but they do not support the bicycle. Balancing the bicycle without flying off the rollers is an extra challenge for the rider. Some find that this helps them focus on the workout, while others prefer the stability of a trainer. See also EXTERNAL LINKS |
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