Keiser is a commercial fitness company that has been in operation since 1976. It sells a wide variety of specially made exercise equipment that uses the concept of variable resistance and hydraulic resistance design. These pieces of equipment are customizable and designed to target multiple muscle groups in a single session.
Types
Keiser products include weight-lifting machines, weight racks, treadmills, bikes, elliptical trainers and various accessories. The weight machines are made in such a way that they can be converted into various forms to perform different exercises. The weight racks, too, can be converted to take advantage of different free weight exercises or fit into a specific space in your gym or home.
Technology
Keiser equipment use hydraulic technology to produce its resistance. The air cylinders are equivalent to the resistance produced by several hundred pounds of weight stacks. The equipment is therefore low impact in nature, which offers more control and a reduced risk of injury.
Weight-Lifting Equipment
The Air250 is an entry-level, cost-effective bilateral piece of equipment that can be adjusted to do leg curls, crunches, lat pull-downs, chest presses, etc. The Air300 is designed for unilateral and bilateral exercises and has a higher weight range; it can do hip abductors, leg curls and extensions, leg presses and squats. The Air350 contains biaxial pieces of equipment that allow you to do the chest press, upper back and butterfly. The Infinity series cable machine is the most versatile, working every muscle group at any angle.
Exercise Equipment
The M series of elliptical trainers use a magnetic resistance system that simulates walking and running at any pace without shocks to the joints or connective tissue. Both upright and recumbent bikes allow for bi-directional resistance; they are ideal for therapy and sports performance settings. The AC5000 treadmills are durable machines that can be adjusted to perform speeds up to 12 mph.
Benefits
A study conducted by Barbara Gale and Marialice Kern from the Department of Kinesiology of San Francisco State University found that a 10-week Keiser fitness program conferred a beneficial effect upon sedentary women. Aerobic capacity increased by 10 percent, upper body strength increased by 21 to 30 percent and lower body strength increased by 22 to 44 percent. No significant changes in body composition, blood cholesterol levels and triglycerides were recorded, possibly due to the short time frame or lack of rigorous diet that accompanied the exercise program.
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