Three-track skiing is defined as skiing on one ski while using outriggers to maintain balance. Please note the purposeful statement "skiing on one ski" as opposed to "skiing on one leg." It is not uncommon for a skier who is a bilateral amputee to ski on a prosthesis.
Many disabilities affect the strength, reflexes, and range of motion of one leg or the other--predisposing a skier for three track skiing. Diseases and accidents may also take their toll on a skier's ability to ski on two legs. A few examples are developmental or muscular diseases that affect one leg, rods or pins in a badly broken leg, a severe knee injury, fused ankles, or a traumatic accident that leaves one leg weak or non-functioning.
With or without a sound leg, you will be able to stand on one ski and maintain dynamic balance with the assistance of outriggers. Outriggers provide a three-point balance system, enabling you to maintain dynamic balance while skiing. Whether you will need outriggers, all models provide a range of lengths and adjustments.
Skis and boots - Boot and ski selection and modifications are integral to skier performance. Fatigue levels are generally high for three-track skiers who do not use crutches or exercise their upper bodies and for those who walk with a prosthesis. By having you walk in the ski boot with outriggers during dryland practice will provide a good indication of whether fatigue is going to be an issue. This tactic also allows you to become accustomed to the boot and outriggers before attempting to use them on a slippery surface.
Outriggers - These ski-equipped crutches provide the three-track skier with a three-point balance system: one ski and two outriggers on the snow.
Other adaptive equipment - Three-track skiers can also benefit from many of the same pieces of adaptive equipment that four-track skiers use, i.e., tethers and slant boards.
Three-track skiers are capable of developing all the basic movement skills of skiing. Obviously, however, we need to modify the standard exercise progression somewhat. Developing the balancing skill will be a significant challenge for most three-track skiers, but once basic skills like this and others are established, their development is comparable to what which occurs in two-track skiing.