Hello,

The following paper can help your answer:

Passive muscle length changes affect twitch potentiation in power athletes. Med Sci Sports Exerc. 2014 Jul;46(7):1334-42

Thanks Hugo!

Hello Jordi,

Not sure, but since MVC correlates with isometric tetanic force and eccentric torque compares with lengthening force, it might be worth taking a broader view on this subject and read some papers based on isolated muscle experiments. e.g. Roots et al 2012, Journal of musc res and cell motil, 33: 313-325, and refs therein.

Hope useful,

KW

Ok, thanks both. But what I want to know if there's any way I can correlate the isometric strength that a muscle can do in a specific position to its eccentric capacity.

Better said, if after an intervention I find a decrease in isometric strength, can I anyhow deduct a decrease in eccentric strength too?

Not straightforward! Experiments isolated muscle show that procedures (e.g. myosin inhibitors, cooling) that decrease isometric tetanic force do not have an effect of similar magnitude on lengthening force. On that basis, a direct 1:1 correlation is not expected between decrease in isom str and eccentric strength. 

Roots et al, 2007, JMRCM.

Thanks! That was what I was afraid of. Thanks for the reference

HI,

there is a Publikation in German, which gives Correlations:

Exzentrisches Krafttraining: Auswirkungen auf unterschiedliche Maximal- und Schnellkraftparameter (Schriftenreihe des Bundesinstituts für Sportwissenschaft) Taschenbuch – 2. Dezember 2011

von Bundesinstitut für Sportwissenschaft (Herausgeber), Klaus Wirth (Autor)

I`don`t Know, this is an option.

Thanks Gilbert! But I have some questions about your reference

Is it in a specific chapter of the book? Could u brief me what the author says about this topic? And last, do you know if this book it's been translated to English?

HI Jordi,

unfortunatly it is not translated into english to my knowledge.

Klaus Wirth wrote about eccentric force and the relation between maximal force and explosive Force. He did two investigations with the upper and lower extremity.

These were  28 young men (24.7 years old), sport students with no experience in strength training. The intervention and the controll group did 6 weeks and 3 times a week either concentric or eccentric exercise.  The correlation from all partizipants was r = 0.78 for the upper extremity (bench press) after the training. There are a lot more other correlation given to other parameter of strength.

For more infomation see the scanned page and the related link to amazon:

http://www.amazon.de/Exzentrisches-Krafttraining-unterschiedliche-Schnellkraftparameter-Sportwissenschaft/dp/386884516X/ref=sr_1_2?ie=UTF8&qid=1444650673&sr=8-2&keywords=klaus+Wirth+Krafttraining

I hope, this can help,

Best regards, Gilbert

Thanks, it's really helpful. This scanned pages can make the difference!

I appreciate it.

Best regards, Jordi