橢圓運動機在操作時會有與跑步同樣的效果，但卻不會有與地面接觸所產生的衝擊力。再配合上手部的運動，使手腳能同時達到運動的效果。
本研究主要的目的是針對運動器材中的橢圓運動機，以系統化的設計方法設計出符合需求的新型橢圓運動機，以期更符合模擬人行走或跑步時的步伐。
本文首先蒐集及分析現有專利中橢圓運動機之構造與運動特性，歸納出其設計需求及設計限制；再經由系統化的設計程序，根據功能需求，合成並評估出可行的新型橢圓運動機構想；選定新型構想後，配合所訂定的需求運動曲線，以圖集搜尋法及連續法合成出新型橢圓運動機各參數尺寸，完成新型橢圓運動機的運動設計。此新型橢圓運動機的特性有：一、腳踏板位置的耦桿點曲線為近似橢圓形的封閉曲線，其跨距長與高度符合一般人的跨步距離；二、曲柄的位置在使用者前方，使用者可以更自由的伸展運動；三、所有桿件皆為連桿，沒有滾子或滑件所造成的噪音及易磨損問題。

Elliptical motion exerciser makes users exercise just like walking or running, and won’t bear the impact of the reacting force from the ground. The hands can exercise together with a handle part on it.
The main purpose of this study focuses on applying a systematic method to design a new elliptical motion exerciser conforming design requirements to simulate walking or running.
This study first collects and analyzes the structure and kinematic feature of the present elliptical motion exercisers in patents to conclude needs and constraints for design; afterwards, through the systematic design procedure, we can synthesize and evaluate the possible conceptual design for the new type meeting the functional need. According to the selected conceptual design for the new exerciser, the kinematic dimension of the new exerciser is synthesized coordinating the required couple-point-curve by searching atlas and applying homotopy.
There are three features about this new type. First, the coupler-point -curve of the point of the foot plate is a closed curve near elliptic fitting with most of people for simulating kinematic form of feet walking and running. Second, user can spread whole body easily because the position of the crank is in front of the user. Third, all members are link, and there is no noise and attrition problem made by roller or slider.

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