An elliptical training machine, sometimes referred to as cross-trainer, is a stationary fitness device. An elliptical fitness machine can have functions to simulate a combination of jogging, stair climbing and cross-country skiing while holding onto handles that engage your arms and upper body. Benefits of using an elliptical trainer are that it provides a cardiovascular workout, it's gentle on joints and incorporates movements from the entire body.
Concerns
Ligament tears and joint problems in the knees, ankles and hips are a common complaint among runners, according to the website Runners Rescue. Columbia University's health-information website, Go Ask Alice!, notes that no matter how careful a person is, physical activities like jogging can cause a stress fracture. Because an elliptical trainer eliminates repetitive force on joints, it's one of the best machines a person who enjoys running or jogging for exercise can use.
Injuries
According to MayoClinic.com, stress fractures, which occur most often in the lower leg and foot, are tiny cracks in the bones caused by repetitive force or overuse. Runners and people with osteoporosis -- a disease that causes bones to weaken -- are at high risk for developing stress fractures. Further, participating in certain sports and engaging in activities like running and jogging can rupture a ligament or tear cartilage in lower leg joints.
Benefits
The Nicholas Institute of Sports Medicine and Athletic Trauma reports that for each mile you run, your foot hits the ground about 800 times, and your body absorbs about 2.5 times your body weight. Not only is running hazardous to people with existing joint injuries, but healthy joints can eventually succumb to the constant stress and strain. According to Spine-health, when using an elliptical machine, your foot never hits the ground, entirely eliminating the impact of walking or running on a hard surface. An elliptical machine also puts very little stress on the spine and bones.
Stride Length
Before using an elliptical trainer, Spine-health suggests checking your stride length. Some elliptical machines have a pre-set stride length that is not appropriate for everyone. Limiting your stride length can put strain on your joints and ligaments, which is problem for someone with existing injuries. People who do not have joint problems can develop them over time by using an elliptical trainer with a limiting or far-reaching stride length.
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