| 摘要 |
A machine for utilizing muscular energy is disclosed which can be driven, through separate operating means, by movement of a user's legs and by upper body (i.e. arms and torso) movement. The movement of the legs and the upper body movement need not be synchronized, and each part of the user's body can work at the rate most suited to it. A bicycle with a driven rear wheel is a typical example of such a machine. Both of the separate operating means can be arranged to drive a common spindle so that the power applied to the spindle is greater than would be the case in a conventional bicycle where only leg power is applied in driving the machine.
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