Differentiated perceived exertion and self-regulated wheelchair exercise.

Area of Science:

• Rehabilitation science
• Exercise physiology
• Biomechanics

Background:

• Self-regulation of exercise intensity is crucial for effective training.
• Rating of Perceived Exertion (RPE) is a common method for self-monitoring exercise.
• Differentiating RPE into peripheral and overall components may enhance accuracy.

Purpose of the Study:

• To evaluate the effectiveness of differentiated RPE (overall vs. peripheral) for self-regulating submaximal wheelchair propulsion in novice users.
• To compare physiological responses during imposed versus RPE-regulated wheelchair exercise.

Main Methods:

• 18 able-bodied novice participants completed incremental and graded exercise tests on a wheelchair ergometer.
• Participants performed intermittent exercise bouts at imposed light (40% Vo2peak) and moderate (60% Vo2peak) intensities.
• Participants self-regulated exercise intensity using either overall RPE or peripheral RPE.

Main Results:

• Peripheral RPE allowed precise self-regulation during moderate-intensity exercise.
• Overall RPE resulted in accurate self-regulation during light-intensity exercise.
• Significant differences in oxygen consumption and blood lactate were observed in the overall group during moderate-intensity exercise.

Conclusions:

• Peripheral RPE is a valuable tool for self-regulating moderate-intensity wheelchair exercise in novices.
• Overall RPE is more suitable for self-regulating light-intensity wheelchair propulsion.
• Differentiated RPE strategies can improve exercise self-regulation in wheelchair users.