The muscle fibers forming our calves, thighs, buttocks, upper arms, shoulders and back have the capacity to generate maximum blood flow while forcing the largest volume of air flow from our lungs. Additionally, the author of "Exercise RX," Gary Yanker and his renowned team of medical experts have identified five major muscle group movements capable of producing maximum circulatory stimulation throughout the entire body. Specifically, these five muscle movements are the stepping movement for calves and shins, the kicking action for thighs and buttocks, rotating the torso for the abdominal/lower back muscles, rowing or swimming movements for arms, chest, upper back and finally raising both arms in a continuous fashion. Exercising these five largest muscle groups produces the most vigorous blood flow to all of the body's muscles and vital organs. The health and fitness benefits from engaging these muscle groups are numerous and range from improving strength and cardio to coordinating balance. It also explains why the GYROCISOR "SuperStroke" maneuver is so effective as a health and performance enhancing exercise. Basically, the GYROCISOR "SuperStroke" maneuver engages the majority of our core muscles in a highly coordinated, bi-lateral dual elliptical movement that can be performed for a varied duration to achieve the desired fitness level. When this movement is combined with the angular momentum of a live and loaded GYROCISOR Power Shuttle, the efficacy of the exercise is multiplied by a factor that is increased by speed or additional weight.