During Discovery's nine-day mission the astronauts were to perform 83 experiments many of which were medical. Glenn, help the aged. They included research into balance disorders. In space the sense organs that indicate orientation can get confused. Finding out why this happens and seeking a remedy may help those on Earth with balance and co-ordination problems.
Some experiments involve work before, during and after the mission.
One investigation will study the effects of space travel on muscle wastage and Glenn's recovery back on Earth. The recovery process Just testing That is the main point about the experiments that Glenn performed in orbit. His reactions to zero gravity and his recovery from it will be different from the younger astronauts. It is expected that he will be more affected by stress and take longer to recover than the other astronauts. Discovery's crew included two doctors.