People push just as hard during the second workout as the first, even though they feel less sore and recover faster.

Scientific Claim

Peak torque and total work performed during maximal eccentric elbow flexor contractions are not significantly different between the first and second bouts in untrained men, indicating similar mechanical demand despite reduced damage.

Original Statement

“No significant difference in the changes in peak torque (P = 0.12) or total work (P = 0.35) over six contractions in a set, and more than 10 sets of six eccentric contractions was evident between two bouts.”

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

definitive

Can make definitive causal claims

Assessment Explanation

This is a direct measurement of physical output with no causal inference. 'Are not significantly different' is appropriate for descriptive statistical results.

Evidence from Studies

Supporting (0)

No supporting evidence found

Contradicting (1)

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

Randomized Controlled Trial

Human

2015 May 15

The study found that after the first workout, muscles didn't stretch as much during the second workout, meaning the body adapted to use less effort and got less damaged — so the mechanical demand wasn't the same, it was lower.

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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