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

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Exploring the issue of 'functionality' in isokinetic dynamometry.

Matt Greig¹, Ben Langley¹

¹Clinical Biomechanics Research Group, Edge Hill University, Ormskirk, UK.

Research in Sports Medicine (Print)

|September 20, 2023

Summary

Isokinetic dynamometry, a gold standard for strength assessment, can be improved. Tailoring data collection protocols to specific functional movements, like walking gait, enhances clinical relevance and rehabilitative success.

Keywords:

Isokinetic dynamometer musculoskeletal screening rehabilitation

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Muscle Imbalances: Testing and Training Functional Eccentric Hamstring Strength in Athletic Populations

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Area of Science:

Biomechanics
Rehabilitation Medicine
Sports Science

Background:

Strength is crucial for physical performance, injury prevention, and rehabilitation.
Isokinetic dynamometry is the gold standard for strength measurement, offering adjustable parameters.
Current methods face criticism for lacking functional relevance due to arbitrary speed selection.

Purpose of the Study:

To investigate the functional relevance of isokinetic dynamometry in assessing strength.
To inform the development of bespoke data collection protocols for isokinetic testing.
To enhance the clinical utility of isokinetic dynamometry by aligning it with functional movement demands.

Main Methods:

Biomechanical analysis of walking gait to determine functional movement demands.
Identification of angular velocities for concentric and eccentric knee flexor and extensor actions during gait.
Application of these findings to design a tailored isokinetic data collection protocol.

Main Results:

Concentric knee flexor and extensor demands during walking occurred at an average angular velocity of 70°·s^-1.
Eccentric knee flexor and extensor demands during walking occurred at average angular velocities of 192°·s^-1 and 165°·s^-1, respectively.
These velocities differ significantly from arbitrarily selected speeds in standard isokinetic testing.

Conclusions:

Bespoke isokinetic data collection protocols, informed by biomechanical analysis of functional movements, significantly enhance testing efficacy.
Tailoring isokinetic testing to specific clinical goals, such as post-knee replacement gait, improves functional relevance.
This approach optimizes strength assessment for better rehabilitation outcomes and performance prediction.