The Compact Wheelchair Roller Dynamometer

Area of Science:

• Rehabilitation Engineering
• Biomechanics
• Medical Device Development

Background:

• Current equipment for evaluating wheelchair propulsion is often complex and expensive.
• There is a need for accessible and reliable tools to assess wheelchair propulsion capacity.

Purpose of the Study:

• To validate a novel dynamometer prototype designed for assessing wheelchair propulsion.
• To compare the prototype's performance against a high-speed videography reference system.

Main Methods:

• Twenty-one healthy subjects performed a 20-second wheelchair sprint protocol.
• The prototype's power and rotation data were collected for both left and right sides.
• Data were compared with a reference system using high-speed videography (240 fps).

Main Results:

• High levels of accordance were observed between the prototype and the reference system (95% CI).
• Excellent intraclass correlation coefficient (ICC = 0.99, P < 0.001) indicated high reliability.
• No significant differences were found in rotation (P = 0.91) or power (P = 0.94) measurements.

Conclusions:

• The new dynamometer prototype meets validation criteria for assessing wheelchair propulsion.
• This equipment offers a reliable and potentially more cost-effective alternative for clinical and research settings.
• The validated prototype can serve as a valuable new tool for evaluating wheelchair propulsion capacity.