Most free weight and traditional resistance machines involve beginning an exercise from a dead stop. Getting a weight moving from a dead stop is called overcoming the moment of inertia in physics and requires acceleration. In exercise, overcoming the moment of inertia places a rapid and dramatic load on your muscles.
At this point your muscles, joints and tendons are at most risk of injury. Because you aren’t actually lifting a weight when you use compressed air gym equipment, there is no corresponding moment of inertia to overcome and therefore less potential for injury. This means that hydraulic exercise equipment is particularly suitable if you have a history of muscle or joint problems — especially compared with more traditional forms of resistance training.
This is why our unique air resisted machines are best for toning without the soreness or injury of muscles and joints over the next few days.