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Related Concept Videos

Eccentric Loading01:16

Eccentric Loading

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 load.
Design of Columns under an Eccentric Load01:21

Design of Columns under an Eccentric Load

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 centric...
General Case of Eccentric Axial Loading01:12

General Case of Eccentric Axial Loading

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 bending,...
Eccentric Axial Loading in a Plane of Symmetry01:16

Eccentric Axial Loading in a Plane of Symmetry

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.
Exercise and Muscle Performance01:27

Exercise and Muscle Performance

Exercise induces a range of adaptations in muscle tissue, depending on the type and duration of activity. Such physical training can be broadly categorized into two types: endurance exercises and resistance exercises.
Endurance exercises
Endurance exercises involve running, swimming, or cycling, which require repetitive movements with low force output. When a person engages in endurance exercise, a few noticeable changes occur in their skeletal muscles. For instance, the number of capillaries...
Posttensioned Masonry Walls01:15

Posttensioned Masonry Walls


Post-tensioned masonry walls use high-strength steel rods or flexible tendons to enhance the strength and efficiency of masonry structures. These elements are securely anchored to the foundation and extend vertically either within the cores of the masonry units or between the masonry wythes. The construction process involves building the wall with these tensioning elements in place and allowing the mortar to fully cure.
Following the curing process, the tensioning begins. Steel rods are...

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Related Experiment Video

Updated: Jun 8, 2026

Muscle Imbalances: Testing and Training Functional Eccentric Hamstring Strength in Athletic Populations
07:30

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Published on: May 1, 2018

Using additional eccentric loads to increase concentric performance in the bench throw.

Jeremy M Sheppard1, Kieran Young

  • 1Queensland Academy of Sport, Nathan, Australia. Jeremy.sheppard@dlgsr.qld.gov.au

Journal of Strength and Conditioning Research
|September 17, 2010
PubMed
Summary
This summary is machine-generated.

Adding extra weight during the eccentric phase of a bench throw significantly improves concentric performance. This finding suggests strength coaches can use accentuated eccentric loads to boost athletic power.

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14:10

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

Published on: January 31, 2013

Area of Science:

  • Biomechanics
  • Exercise Physiology

Background:

  • The bench throw is a common exercise for developing upper body explosive power.
  • Optimizing concentric phase performance is crucial for maximizing power output in ballistic movements.

Purpose of the Study:

  • To investigate if augmented eccentric loads enhance concentric performance in the bench throw.
  • To compare concentric performance under different eccentric-concentric load conditions.

Main Methods:

  • Fourteen male subjects performed bench throws with varying eccentric-concentric loads (40-40, 60-40, 70-40, 80-40 kg) using a Smith machine.
  • A linear position transducer measured barbell displacement-time characteristics to determine maximum displacement.
  • Statistical analysis used a significance level of p < 0.05.

Main Results:

  • All augmented eccentric load conditions (60-40, 70-40, 80-40 kg) resulted in significantly greater barbell displacements compared to the equated load condition (40-40 kg).
  • No significant differences in displacement were found between the different augmented eccentric load conditions.
  • Concentric peak barbell displacement was superior with additional eccentric loads.

Conclusions:

  • Augmented eccentric loading in the bench throw can enhance concentric performance.
  • Increased muscle tension and crossbridging during the eccentric phase may explain the improved concentric output.
  • Strength and conditioning professionals can utilize accentuated eccentric load bench throws to improve athletes' concentric performance.