Generally, for health maintenance (improvement of lifestyle-related diseases) or enhancement of athletic abilities, it is valid to decrease body fats and promote carbohydrate metabolism by aerobic exercises. That is to say, if we incorporate glucoses which are energy sources of muscles into the muscles and burn the glucoses, we consume surplus glucoses, as a result of improvement of hyperglycemia and hyperinsulinemia, incorporating the glucoses and burning the glucoses contribute the improvement of lifestyle-related diseases (diabetes, obesity and hyperlipemia and so on).
The incorporating the surplus glucoses into the muscles is caused by muscle contractions, if we increase incorporated quantity into the muscles, it becomes possible to promote the carbohydrate metabolism.
In order to do the carbohydrate metabolism effectively by the muscle contractions, it is desirable to cause the muscle contractions of large volume muscles, we think that it is valid to extend and bend a hip joint and contract a big muscle group from a trunk to femoral regions.
There are running or walking et cetera as exercises contracting the big muscle group, and in the capacity of a device to imitate those exercises, treadmill is generally known.
The treadmill is an exercise assisting device to be capable of adapting rotational velocity and inclination angle of a moving belt which is a walking surface or running surface. And, as an aim of a training of a whole body endurance, running exercise or walking exercise on the treadmill are often done.
On the other hand, in the capacity of an exercise assisting device which is different from the treadmill and which intend a simulation of running or walking, it is known that an axle moving type bicycle ergometer which is disclosed in Japanese Patent Application Laid Open No. 2002-78817.
The ergometer comprises a pair of rotational axes which are given each rotational force by a pair of right and left pedals and a pair of right and left arms, a pair of tables which supports each axis of the pair of rotational axes in a horizontal direction, a pair of guide parts which supports each table of the pair of tables capably of reciprocating in a direction orthogonal to the pair of rotational axes, a pair of moving mechanisms which move the pair of tables on the pair of guide parts based on rotational angle of the rotational axis and a braking mechanism which do a breaking of each rotational axis of the pair of rotational axes (refer to Japanese Patent Application Laid Open No. 2002-78817).