Title page for ETD etd-5115131974430

Type of Document Master's Thesis
Author Coombs, Dana Joseph
URN etd-5115131974430
Title Design of User-Weight-based Exercise Machines
Degree Master of Science
Department Mechanical Engineering
Advisory Committee
Advisor Name Title
Reinholtz, Charles F. Committee Chair
Mitchell, Larry D. Committee Member
Tidwell, Paul H. Committee Member
  • linkage
  • engineering design
  • kinematics
  • exercise equipment
Date of Defense 1997-02-07
Availability unrestricted
This thesis describes the process of designing

exercise machines that raise the weight of the

user as the primary source of resistance. Most

strength training machines use weight stacks or

springs as the source of resistance. While such

machines are highly evolved and provide an

excellent workout, they typically have a number

of disadvantages including high cost, and large

size and weight. A user weight-based exercise

design will reduce the cost, size and weight of

the machine. The design process considers

some important issues. Parallelogram linkages

are implemented to provide non-rotary motion

without the disadvantage of linear bearings. The

user input is located with respect to the user

providing correct relative motion for the

exercise. The design also considers proper

resistance curves during the design process.

Specific examples are given for each step of the

design process. These examples include the

evolution of ideas and the creation and use of

kinematic and automatic tools.

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