Purpose: The purpose of the study is to investigate the amount of energy it requires individuals to move. We will evaluate the energy demands of both arm reaching and walking.

Main eligibility requirements:

• 35–55 years of age
• Able to walk without the use of a cane/walking aid
• Able to participate in two evaluation sessions (about a week apart) at CU Boulder

Participants will be compensated up to $200 for their time.