Recumbent exercise bikes employ a supportive chair seat that offers better back support than standing bicycles, so recumbents are a popular choice for home exercise. As of October 2010, the LifeSpan fitness company offers one model of recumbent bike, the R3 Recumbent. The R3 is a mid-range priced exercise bike and is available at retail stores as well as directly from LifeSpan through its website, Lifespanfitness.com.
Function
The LifeSpan R3 recumbent provides comfortable biking exercise that burns calories and builds cardiovascular fitness. You can target your optimum heart rate by tracking it manually or by using the machine's built-in heart rate monitor. The monitor automatically adjusts the resistance level of the machine to keep you constantly pedaling at a speed that brings your heart rate to a selected level.
Features
The R3 features an 11-inch flywheel with automatic magnetic resistance. Magnetic resistance, as opposed to a tension belt, provides a smooth level of resistance throughout the pedal stroke, according to the Galt Tech's online buying guide
The LifeSpan R3's LCD monitor gives readouts for time, distance, speed, RPM, watts, calories burned, program level and heart rate. The monitor tilts for easy viewing while riding.
The machine comes programmed for six workouts: manual, interval training, weight loss, mountain climb, random and target heart rate. The R3's plush seat and lumbar support provide a comfortable ride, while the magazine rack allows you to exercise your mind while exercising your body.
Size
The R3 measures 68 inches long, 27 inches wide and 45 inches high. The seat adjusts along the seat rail so you can vary the distance between the seat and the pedals. The R3's heavy-gauge steel frame makes it slightly bulkier at 137 lbs. than similar recumbent bikes, such as the Schwinn 230. However, the R3 moves easily on caster wheels on the front base.
Price and Warranty
LifeSpan's list price for the R3 recumbent bike is $899, as of October 2010. Bikes purchased for residential use come with a lifetime warranty on the frame and resistance system, a three-year warranty on all parts and a one-year warranty on all labor. R3 bikes purchased for commercial use come with a five-year warranty on the frame and resistance system and a one-year warranty for parts and labor.
Considerations
When shopping for a recumbent exercise bike, compare the features, price and value of the machines. When compared to the industry leader, the Schwinn 230, the R3 is sturdier and has similar features, but costs roughly $400 more. Comfort is another critical factor when choosing a recumbent exercise bike, so take a test ride on each model before purchasing.



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