MAR 17 1994
attention d: SD5-94-513 1 3
Gideon Ariel, Ph.D.
Universities Space Research Association
Trabuco Canyon, CA 92679
Dear Dr. Ariel:
Thank you for delivering the second generation Resistive Exercise Dynamometer RED. This
is a remarkable design with the potential for an enormous positive impact on How
astronauts exercise in space. The potential for modifying the RED such that it becomes a
stair stepper or a rower is especially ingenious. Please extend my congratulations to Mr.
Phill Harmon and his staff for a truly superb effort !
In addition, the potential use of the RED as a dynamometer to measure skeletal muscle
performance during space flight missions will be a major technological breakthrough. This
option will provide NASA the capability to monitor skeletal muscle strength changes while
on orbit. Knowledge of these changes will be a major enhancement that will enable
appropriate space flight exercise countermeasures to maintain muscle performance.
Michael C. Greenisen, Ph.D.
Manager, Exercise Countermeasures Project
for the Design of the Exercise Machine on the Space Station