Mechanically Activated Stretch Reflex (M.A.I.R) Exercises

**Pegasus** · 01-31-2016

Originally Posted by marinera

You just have to observe what happens in athletes or workers; for example runners have a number of tendon injuries and tendinopaty way higher than gymnasts, dancers or even weightlifters. Also inflammations to hands, wrists and fingers are pretty common among those who make repetitive movements at low forces but for a high number of times, like typists to say one.

It also makes sense because it doesn't allows for strain stress relaxation to take place; so, every time the connective tissue is stretched, even with little strain or force, it is a small shock or break; with comparable forces, cyclic stretch will cause more damage than static stretch, so in the end the strain will be bigger through static stretch than cyclic stretch. Look at contorsionists, do they do a high number of stretches or do slowly try to get their body in the position they want to achieve?

I suppose though you want some kind of scientific backup. Too late at night to search it now, but I will do when I will log again. maybe even tomorrow.

Yes these are overuse injuries . They occur with vey prolonged use ,hours a day .

**marinera** · 01-31-2016

Clin Biomech (Bristol, Avon). 2007 Oct;22(8):932-40. Epub 2007 Jun 28.
Cyclic loading causes faster rupture and strain rate than static loading in medial collateral ligament at high stress.

Thornton GM¹, Schwab TD, Oxland TR.
Author information

Abstract

BACKGROUND:

Ligaments may be subjected to higher than normal loads when one of the complementary ligament restraints of a joint or the ligament itself is injured. Damage can accumulate in a ligament due to cyclic and static loading under these increased loads, but it remains unknown whether one type of loading will cause rupture faster than the other in medial collateral ligament.
METHODS:

The objective of this study was to compare the time and strain behaviour of normal rabbit medial collateral ligaments under static and cyclic loading over a wide range of applied stresses, with particular emphasis on time-to-rupture. Stresses were normalized to ultimate tensile strength and selected from three regions of the stress-strain curve: two linear-region stresses (60% and 30% of the ultimate tensile strength) and one stress at the transition from the toe-region to the linear-region (15% of the ultimate tensile strength).
FINDINGS:

Cyclic loading caused faster rupture than static loading at all stresses. Strain-time profiles were different in that the increase in strain (strain relative to initial strain) was greater under static than cyclic loading prior to rupture. However, steady-state strain rate (when increase in strain reaches a plateau in the secondary strain stage) was greater under cyclic than static loading.

INTERPRETATIONS:

These results suggest that cyclic loading is more detrimental than static loading in ligaments that are subjected to higher than normal stresses following injury of a complementary restraint or the ligament itself.

Cyclic loading causes faster rupture and strain rate than static loading in medial collateral ligament at high stress. - PubMed - NCBI

Ann Biomed Eng. 2007 Oct;35(10):1713-21. Epub 2007 Jul 14.

Fatigue is more damaging than creep in ligament revealed by modulus reduction and residual strength.

Thornton GM¹, Schwab TD, Oxland TR.

Author information

Abstract

Following injury of a complementary joint restraint, ligaments can be subjected to higher than normal stresses. Normal ligaments are exposed to static (creep) and cyclic (fatigue) loading from which damage can accumulate at these higher than normal stresses.

This study tracked damage accumulation during creep and fatigue loading of normal rabbit medial collateral ligaments (MCLs) over a range of stresses, using modulus reduction as a marker of damage. Creep tests were interrupted occasionally with unloading/reloading cycles to measure modulus.

Test stresses were normalized to ultimate tensile strength (UTS): 60%, 30%, and 15% UTS. Not all creep and fatigues tests progressed until rupture but were stopped and followed by an assessment of the residual strength of that partially damaged ligament using a monotonic failure test. Fatigue loading caused earlier modulus reduction than creep. Modulus reduction occurred at lower increases in strain (strain relative to initial strain) for fatigue than creep. In other words, at the same time or increase in strain, fatigue is more damaging than creep because the modulus ratio reduction is greater. These findings suggest that creep and fatigue have different strain and damage mechanisms. Ligaments exposed to creep or fatigue loading which produced a modulus reduction had decreased residual strength and increased toe-region strain in a subsequent monotonic failure test. This finding confirmed that modulus reduction during creep and fatigue is a suitable marker of partial damage in ligament. Cyclic loading caused damage earlier than static loading, likely an important consideration when ligaments are loaded to higher than normal magnitudes following injury of a complementary joint restraint.

Fatigue is more damaging than creep in ligament revealed by modulus reduction and residual strength. - PubMed - NCBI

**Pegasus** · 01-31-2016

Originally Posted by marinera

Clin Biomech (Bristol, Avon). 2007 Oct;22(8):932-40. Epub 2007 Jun 28.
Cyclic loading causes faster rupture and strain rate than static loading in medial collateral ligament at high stress.

Thornton GM¹, Schwab TD, Oxland TR.
Author information

Abstract

BACKGROUND:

Ligaments may be subjected to higher than normal loads when one of the complementary ligament restraints of a joint or the ligament itself is injured. Damage can accumulate in a ligament due to cyclic and static loading under these increased loads, but it remains unknown whether one type of loading will cause rupture faster than the other in medial collateral ligament.
METHODS:

The objective of this study was to compare the time and strain behaviour of normal rabbit medial collateral ligaments under static and cyclic loading over a wide range of applied stresses, with particular emphasis on time-to-rupture. Stresses were normalized to ultimate tensile strength and selected from three regions of the stress-strain curve: two linear-region stresses (60% and 30% of the ultimate tensile strength) and one stress at the transition from the toe-region to the linear-region (15% of the ultimate tensile strength).
FINDINGS:

Cyclic loading caused faster rupture than static loading at all stresses. Strain-time profiles were different in that the increase in strain (strain relative to initial strain) was greater under static than cyclic loading prior to rupture. However, steady-state strain rate (when increase in strain reaches a plateau in the secondary strain stage) was greater under cyclic than static loading.

INTERPRETATIONS:

These results suggest that cyclic loading is more detrimental than static loading in ligaments that are subjected to higher than normal stresses following injury of a complementary restraint or the ligament itself.

Cyclic loading causes faster rupture and strain rate than static loading in medial collateral ligament at high stress. - PubMed - NCBI

Ann Biomed Eng. 2007 Oct;35(10):1713-21. Epub 2007 Jul 14.

Fatigue is more damaging than creep in ligament revealed by modulus reduction and residual strength.

Thornton GM¹, Schwab TD, Oxland TR.

Author information

Abstract

Following injury of a complementary joint restraint, ligaments can be subjected to higher than normal stresses. Normal ligaments are exposed to static (creep) and cyclic (fatigue) loading from which damage can accumulate at these higher than normal stresses.

This study tracked damage accumulation during creep and fatigue loading of normal rabbit medial collateral ligaments (MCLs) over a range of stresses, using modulus reduction as a marker of damage. Creep tests were interrupted occasionally with unloading/reloading cycles to measure modulus.

Test stresses were normalized to ultimate tensile strength (UTS): 60%, 30%, and 15% UTS. Not all creep and fatigues tests progressed until rupture but were stopped and followed by an assessment of the residual strength of that partially damaged ligament using a monotonic failure test. Fatigue loading caused earlier modulus reduction than creep. Modulus reduction occurred at lower increases in strain (strain relative to initial strain) for fatigue than creep. In other words, at the same time or increase in strain, fatigue is more damaging than creep because the modulus ratio reduction is greater. These findings suggest that creep and fatigue have different strain and damage mechanisms. Ligaments exposed to creep or fatigue loading which produced a modulus reduction had decreased residual strength and increased toe-region strain in a subsequent monotonic failure test. This finding confirmed that modulus reduction during creep and fatigue is a suitable marker of partial damage in ligament. Cyclic loading caused damage earlier than static loading, likely an important consideration when ligaments are loaded to higher than normal magnitudes following injury of a complementary joint restraint.

Fatigue is more damaging than creep in ligament revealed by modulus reduction and residual strength. - PubMed - NCBI

Seems to bear out my point.

**alydric1** · 02-09-2016

I hate to be that guy but I just finished reading all of this thread and there is a boatload of information and maybe I missed it but there doesn't seem to be a conclusion.

Are we agreeing that the OP's method is effective or ineffective for adding length and girth?

The wrist-stretch (A-stretch?) and the Uli are both recommended exercises but it is it the method of the routine that is the issue?

**frank12364** · 09-18-2016

Its really hard to understand fully how to perform this exercise. Are there any pictures or videos available?

**The Kidd** · 09-26-2016

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