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Related Concept Videos

Isotonic and Isometric Muscle Contractions01:22

Isotonic and Isometric Muscle Contractions

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Two primary types of muscle contractions are isotonic and isometric, each serving unique functions and involving distinct mechanisms. Both isotonic and isometric contractions are integral to the body's complex system of movement and stability. Isotonic exercises contribute significantly to functional strength and movement, while isometric contractions are crucial for maintaining posture and joint stability.
Isotonic contractions
Isotonic contractions occur when a muscle changes length while...
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Non-destructive Tests for Concrete Strength01:12

Non-destructive Tests for Concrete Strength

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The rebound hammer test, also known as the Schmidt hammer test, is a non-destructive technique for evaluating the hardness of concrete and, indirectly, the strength of concrete. It operates on the principle that the rebound of a spring-driven mass from a concrete surface correlates to the surface's hardness. The device comprises a mass within a tubular housing, a spring mechanism, and a plunger that strikes the concrete. Upon release, the energy imparted to the mass by the spring causes it...
117

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Related Experiment Video

Updated: Jul 2, 2025

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

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[Reference values for isometric strength tests].

Jan Schröder1, Rüdiger Reer2

  • 1Institut für Bewegungswissenschaft, Sport- und Bewegungsmedizin, Universität Hamburg, Turmweg 2, 20148, Hamburg, Deutschland. jan.schroeder@uni-hamburg.de.

Orthopadie (Heidelberg, Germany)
|February 20, 2024
PubMed
Summary
This summary is machine-generated.

Isometric strength testing devices are reliable but not comparable. Device-specific benchmark values for trunk and knee flexion/extension strength testing are recommended for clinical use.

Area of Science:

  • Orthopaedic rehabilitation
  • Biomechanics
  • Clinical assessment
Keywords:
Functional ratiosKnee extensionKnee flexionReference valuesTrunk strength

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