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Related Experiment Video

Updated: Jun 12, 2026

Improving Strength, Power, Muscle Aerobic Capacity, and Glucose Tolerance through Short-term Progressive Strength Training Among Elderly People

Improving Strength, Power, Muscle Aerobic Capacity, and Glucose Tolerance through Short-term Progressive Strength Training Among Elderly People

Published on: July 5, 2017

Older adults underestimate RPE and knee extensor torque as compared with young adults.

Danny M Pincivero¹

¹Department of Kinesiology and Physical Education, Wilfrid Laurier University, Waterloo, Ontario, Canada. dpincivero@wlu.ca

Medicine and Science in Sports and Exercise

|May 29, 2010

Summary

Older adults underestimate knee extensor torque compared to young adults, potentially due to differing muscle recruitment patterns. This impacts understanding of muscle force production across age groups.

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In vivo Measurement of Knee Extensor Muscle Function in Mice

In vivo Measurement of Knee Extensor Muscle Function in Mice

Published on: March 4, 2021

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Last Updated: Jun 12, 2026

Improving Strength, Power, Muscle Aerobic Capacity, and Glucose Tolerance through Short-term Progressive Strength Training Among Elderly People

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Published on: July 5, 2017

In vivo Measurement of Knee Extensor Muscle Function in Mice

In vivo Measurement of Knee Extensor Muscle Function in Mice

Published on: March 4, 2021

Area of Science:

Biomechanics
Gerontology
Exercise Physiology

Background:

Muscle strength and control decline with age.
Understanding age-related differences in neuromuscular function is crucial for maintaining mobility and independence in older adults.

Purpose of the Study:

To compare knee extensor muscle recruitment, torque production, and perceived exertion between healthy young and old adults.
To investigate age-related differences in neuromuscular responses during isometric knee extension.

Main Methods:

Subjects performed isometric knee extension contractions at various intensities (% MVC and perceived exertion levels).
Surface electromyography (EMG) recorded vastus medialis (VM), vastus lateralis (VL), and rectus femoris (RF) muscle activity.
Torque and ratings of perceived exertion (RPE) were measured.

Main Results:

Young adults reported higher perceived exertion than older adults for equivalent % MVC.
Young adults showed greater VL and RF EMG relative to VM, unlike older adults.
Older adults produced significantly greater torque at matched perceived exertion levels compared to young adults.

Conclusions:

Healthy older adults may underestimate their voluntary knee extensor torque relative to young adults.
Differential muscle recruitment patterns between young and old adults may explain these findings.
These results highlight age-related adaptations in neuromuscular control and force perception.