2B is an oblique view of an alternative embodiment of a right side crank arm assembly according to the present invention; [0010]FIG. 3 is an oblique view of an alternative embodiment of a left side crank arm assembly according to the present invention; [0011]FIG. 4 is an oblique view of a particular embodiment of an assisting apparatus according to the present invention; [0012]FIG. 5 is a side vie