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Related Concept Videos

Eccentric Loading01:16

Eccentric Loading

620
Eccentric loading is a crucial concept in the study of structural engineering and mechanics, particularly when analyzing the stability and stress distribution in columns. Unlike centric loading, where the force is applied along the centroidal axis, causing uniform compression, eccentric loading occurs when a force is applied off-center. This off-center application introduces not only direct compressive stress but also bending stress, significantly influencing the column's behavior under...
620
Design of Columns under an Eccentric Load01:21

Design of Columns under an Eccentric Load

878
Designing columns to withstand eccentric loads is a critical aspect of structural engineering, ensuring structures can support off-center loads without failure. This design process must account for the additional normal stresses introduced by eccentric loading, which can significantly influence a column's stress distribution and overall stability. An eccentric load applied to a column induces normal stresses that can be conceptualized as a combination of stresses due to an equivalent...
878
General Case of Eccentric Axial Loading01:12

General Case of Eccentric Axial Loading

318
Unsymmetrical bending occurs when the bending moment applied to a structural member does not align with its principal axis. This misalignment leads to complex stress distributions and deflection patterns that differ from symmetrical bending, which are essential for designing structures to withstand different loading conditions.
Consider a member subjected to equal and opposite forces that are applied along a line that does not coincide with the member's neutral axis. In unsymmetrical...
318
Eccentric Axial Loading in a Plane of Symmetry01:16

Eccentric Axial Loading in a Plane of Symmetry

369
Eccentric axial loading occurs when an axial load is applied away from the centroidal axis of a structural member. This scenario is common in engineering, where structural elements may not be directly aligned due to various design or functional requirements.
369
Design of Columns under a Centric Load01:17

Design of Columns under a Centric Load

326
The design of columns under centric load is a fundamental aspect of structural engineering and is critical for ensuring the stability and integrity of structures. Euler's and Secant's formulas are central to understanding and calculating the critical load and deformation behaviors of columns, providing a basis for safe and effective structural design.
Euler's formula is applicable under the assumption that the column is a perfect, straight, homogenous prism, and it is operating...
326
Stresses under Combined Loadings01:23

Stresses under Combined Loadings

285
When analyzing a bent tube with a circular cross-section subjected to multiple forces, it is crucial to determine the stress distribution in order to maintain structural integrity under varied load conditions.
The process begins by slicing the tube at critical points and analyzing the internal forces and stress components at these sections, focusing on the centroid. Normal stresses, generated by axial forces and bending moments, are either compressive or tensile and vary across the section from...
285

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Updated: Nov 7, 2025

Muscle Imbalances: Testing and Training Functional Eccentric Hamstring Strength in Athletic Populations
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Accentuated Eccentric Loading in the Bench Press: Considerations for Eccentric and Concentric Loading.

Christopher B Taber1, Jared R Morris1, John P Wagle2

  • 1Department of Physical Therapy and Human Movement Science, Sacred Heart University, Fairfield, CT 06825, USA.

Sports (Basel, Switzerland)
|April 30, 2021
PubMed
Summary
This summary is machine-generated.

Accentuated eccentric loading (AEL) can enhance bench press speed at certain loads. However, excessively high eccentric loads (110%) may not consistently improve performance, with effectiveness depending on load and movement range.

Keywords:
augmented eccentric loadingeccentric traininghierarchical linear modelingvelocity-based trainingweight releasers

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Area of Science:

  • Sports Science
  • Biomechanics
  • Strength and Conditioning

Background:

  • Accentuated eccentric loading (AEL) is a training method involving a greater load during the eccentric (lowering) phase than the concentric (lifting) phase.
  • Understanding the impact of AEL on movement velocity is crucial for optimizing training programs.

Purpose of the Study:

  • To investigate the effects of AEL on bench press concentric velocities across various concentric and eccentric loads.
  • To compare the performance outcomes of AEL protocols (100% and 110% of one-repetition maximum) against traditional loading (TRAD).

Main Methods:

  • Ten strength-trained men performed bench presses with loads ranging from 30% to 80% of their one-repetition maximum (1-RM).
  • Eccentric loads were set at 100% (AEL100) and 110% (AEL110) of 1-RM, while TRAD used equal eccentric and concentric loads.
  • Multilevel models were used to analyze the impact of AEL protocols on concentric velocities.

Main Results:

  • AEL100 resulted in faster concentric velocities at 30% and 80% 1-RM compared to TRAD, though this was less pronounced with greater barbell displacement.
  • AEL110 showed a larger change in velocity across the tested loads compared to TRAD.
  • The 110% AEL protocol might have been too demanding for consistent performance benefits.

Conclusions:

  • AEL protocols, particularly AEL100, can enhance bench press concentric velocities across a range of loads.
  • The effectiveness of AEL is contingent upon the specific eccentric load used and the range of motion during the lift.
  • Higher eccentric loads (AEL110) may not always yield superior or consistent performance improvements.