Analysis Version
v1
History
Back to Study: Reduced muscle lengthening during eccentric contra...
correlational
Analysis v1
0
Pro
37
Against

The more the biceps stretched during the first tough workout, the more strength the person lost the next day.

Scientific Claim

The increase in distal biceps brachii myotendinous junction displacement from set 1 to set 10 during the first eccentric bout is significantly correlated with the magnitude of maximal voluntary isometric contraction strength loss at 1 day postexercise.

Original Statement

“A significant correlation was found between the percent change in distal MTJ displacement from set 1 to set 10 during the first exercise bout and the magnitude of decrease in MVC torque from baseline to 1 day postexercise...”

From study:Reduced muscle lengthening during eccentric contractions as a mechanism underpinning the repeated-bout effect.

Evidence Quality Assessment

Claim Status

appropriately stated

Study Design Support

Design supports claim

Appropriate Language Strength

association

Can only show association/correlation

Assessment Explanation

The claim correctly uses correlation language and is directly supported by Pearson’s r values reported in the results. No causal inference is made.

Evidence from Studies

Supporting (0)

0
No supporting evidence found

Contradicting (1)

37
37

Reduced muscle lengthening during eccentric contractions as a mechanism underpinning the repeated-bout effect.

Randomized Controlled Trial
Human
2015 May 15

The study saw that muscles stretched more during the first workout and got more sore and weaker afterward, but it never checked if the amount of stretching directly linked to how much strength was lost — so we can't say for sure they're connected.

Source Study

Reduced muscle lengthening during eccentric contractions as a mechanism underpinning the repeated-bout effect.

Score: 37
DOI: 10.1152/ajpregu.00338.2014

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