Hand & foot trikes

I was invented many hand & foot bikes.
The hand & foot bikes are the user changes directions by shifting the center of weight and moves forward by using both hands and both feet.
The front wheels can automatically change directions to the extent that the cycle itself is leaned over.
The user can achieve a balanced physical development, and the cycle is speedy as both hands and feet are all used to generate a combined propelling force, making it suitable for riding a long distance.

web-site