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Related Experiment Video

Updated: Jun 8, 2025

Measurement of Maximum Isometric Force Generated by Permeabilized Skeletal Muscle Fibers

Measurement of Maximum Isometric Force Generated by Permeabilized Skeletal Muscle Fibers

Published on: June 16, 2015

Maximum Isokinetic Eccentric Elbow Flexor Muscle Force Can Be Estimated Using Maximum Isometric Contraction Force.

Riku Yoshida¹, Kazuki Kasahara², Yuta Murakami²

¹Rehabilitation Medicine, Maniwa Orthopedics Clinic, Niigata, JPN.

|November 5, 2024

Summary

Estimating elbow eccentric (ECC) muscle strength is challenging. This study found that elbow isometric (ISO) flexion strength, especially when combined with muscle thickness, can accurately predict ECC strength in athletes.

Keywords:

eccentric contraction elbow flexor lengthening contraction maximal voluntary contraction muscle thickness

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Last Updated: Jun 8, 2025

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Isometric and Eccentric Force Generation Assessment of Skeletal Muscles Isolated from Murine Models of Muscular Dystrophies

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Published on: January 31, 2013

Area of Science:

Biomechanics
Sports Science
Musculoskeletal Physiology

Background:

Accurate measurement of maximal isokinetic eccentric (ECC) muscle strength is difficult in field settings.
Developing practical methods to estimate ECC strength is crucial for sports performance and injury prevention.
Elbow flexor strength assessment is important for various athletic activities.

Purpose of the Study:

To determine if elbow isometric (ISO) flexion muscle strength can estimate elbow ECC flexion muscle strength.
To investigate the added value of muscle thickness (MT) in estimating elbow ECC flexion muscle strength.

Main Methods:

147 healthy adults (99 males, 48 females) participated.
Maximal isometric and eccentric elbow flexion strength were measured using an isokinetic dynamometer.
Elbow flexor muscle thickness was measured via ultrasound.

Main Results:

Multiple regression analysis showed a high coefficient of determination (R²=0.89).
Elbow isometric flexion strength was a significant predictor (standardized coefficient β=0.94).
Muscle thickness also showed a significant association (standardized coefficient β=0.07), improving estimation accuracy.

Conclusions:

Elbow isometric flexion strength can reliably estimate elbow eccentric flexion strength.
Incorporating muscle thickness enhances the accuracy of estimating eccentric muscle strength.
These findings offer a practical approach for assessing elbow flexor strength in sports environments.