Protein, which is needed to maintain and rebuild muscles.

Get regular exercise to help maintain muscles and bone mass and prevent weight gain.

Paraplegics use the devices to maintain muscles with lost nerve function.

"Maintaining healthy bones and muscles can be better understood if we can remove the pervasive force of gravity," Dr. Sulzman said.

It should also maintain excellent flexibility, strength and endurance of the hip, pelvis and lower back muscles.

A well-designed exercise program is often considered a crucial part of therapy that helps to maintain strong muscles and bones and flexible joints.

Protein provides energy and is needed for the body to make new cells, to maintain and rebuild muscles, to carry other nutrients, to act as messengers in the body, and to support the immune system.

Apart from the important physical and psychological benefits derived from preserving the mobility of joints, maintaining healthy, active muscles and improving the flow of blood through the heart to all parts of the body, there are other advantages.

Regular exercise is recommended as both safe and useful to maintain muscles strength and overall physical function.