Indoor cycling
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Indoor cycling is a form of exercise that involves using a stationary exercise bicycle in a classroom setting. The concept was created in the 1980s by ultra-endurance athlete Jonathan Goldberg ("Johnny G."). Participants set goals based on their heart rate, which can be measured by hand or using a heart rate monitor.
Several competing programs exist, including "Spinning," administered by Mad Dogg Athletics, "Studio cycling," operated by Reebok, and "Power pacing," from Keiser.
A typical class involves a single instructor at the front of the class who leads the participants in a number of different types of cycling. The routines are designed to simulate terrain and situations encountered in actual bicycle rides, including hill climbs, sprints and interval training. Coasting downhill, however, is not simulated. The instructor uses music and enthusiastic coaching to motivate the students to work harder.
Each person in the class can choose his/her own goals for the session. Some participants choose to maintain a moderate, aerobic intensity level, while others drive their heart rates higher in intervals of anaerobic activity. It can be difficult to stay at the moderate level in a class that is geared towards more intensity. If the exercise is not done correctly, injuries can occur; problems with the lower back and knees are most common.
Classes generally use specialized stationary bicycles. Features include a mechanical device to modify the difficulty of pedaling, specially-shaped handlebars, and multiple adjustment points to fit the bicycle to a range of riders. The pedals are equipped with toe straps to hold the foot to the pedal, enabling powerful upstrokes. They may also have cleats for use with specialty bicycling shoes. These bicycles do not have the electronic features found on some models of stationary bicycles.
The difficulty of the workout is modulated in three ways:
- By varying the resistance on a flywheel attached to the pedals. The resistance is controlled by a knob, wheel or lever that the rider operates, causing the flywheel brake (a common bicycle brake, a friction wheel, a magnetic eddy-current brake, a viscoelastic fluid brake, or a strap running around the flywheel) to tighten. Tightening the brake makes pedaling more difficult while loosening it makes pedaling easier. On most bikes, the brake can be completely loosened, leaving no resistance to pedaling except the inertia of the flywheel; or it can be tightened to a point that the rider can no longer generate enough force to turn the flywheel. Usually, riders who can not tolerate the resistances called out by the instructor are encouraged to ride at a level at which they feel comfortable yet challenged.
- By changing the cadence (the speed at which the pedals turn). Pedaling faster against high resistance expends more energy than pedaling slowly against low resistance.
- By sitting or standing in various positions:
- Forward, with hands at the front-most part of the handlebars where the handles are parallel to the sides of the rider's body, used only when out of the saddle
- Middle, with hands on the 12-14" part of the handlebars that crosses the rider's body
- Rear, with hands at the center part of the handlebars
Each of these positions works the muscles in slightly different ways. Proper form for standing while pedaling requires the body to be more upright and the back of the legs touching or enveloping the point of the saddle, with the center of gravity directly over the crank. The center of gravity or pressure of body weight should never rest on the handlebars. Any mode of "hovering" where any muscles are isolated and the natural movement of another body part is forced to cease is not an approved or safe method for Spinning and is not part of the official Spinning program.
Most indoor cycling classes are coached with music. Riders may synchronize their pedaling to be in time with the rhythm of the music, thus providing an external stimulus to encourage a certain tempo. Often, the music chosen by the instructor is dance music or rock music set to a dance beat (i.e. 4/4 time), but not necessarily. This tends to help motivate participants to work harder than they might otherwise. The instructor also may choose specific song for sprints, climbs, and jumps. While the music provides a tempo cue, the cadence does not need to be a multiple of the beat in order for the rider to feel in rhythm; the music therefore helps a rider maintain any constant cadence, not just a cadence that matches the beat.
It is recommended when riding in a class to bring plenty of water. Indoor cycling is very energetic and causes a lot of sweating, and a person who is near dehydration can easily be dehydrated by the end of an hour of hard riding. One ounce (30 millilitres) of water consumed for each minute of work is the recommended and safest hydration ratio, but this could be varied depending on your weight.
The flywheel resistance control is also used to brake the flywheel. When changing from fast pedaling to slow, the flywheel brake may be used to slow the flywheel rather than allowing the force of the angular momentum to be applied to ones knees and legs.
[edit] Spinning as a bicycling technique
Spinning on a mobile bicycle refers to the technique of using a range of gears to maintain a constant rapid cadence of 60-110 rpm in controlled, even pedal strokes. This technique is recommended to improve bicycle control, aerobic fitness and endurance. Lance Armstrong notably uses this technique even on steep climbs.
