This study suggests that FES ambulation may allow cardiorespiratory demands comparable to those of AC exercise while offering an alternative activity for sufferers of upper-extremity injury or chronic pain. While the high energy requirements and low gait speed of FES ambulation may limit its potential as a source of functional locomotion, high energy uptake may be useful when considered as a means of exercise activity. Limitations of the study include separate methods of heart rate measurement and complications in pace quickening caused by the present status of FES technology. Future improvements in technology might make possible independent use of FES ambulation by persons with lower-extremity paralysis, increasing the chances of adherence to exercise that may assist in the prevention of obesity-related secondary conditions. Expanding the possibilities for exercise training for persons with lower limb paralysis can be an important step in improving fitness and preventing many common secondary conditions associated with physical inactivity.